VOLCLAY WATERPROOFING SYSTEM FOR STRUCTURES VOLTEX

Transcription

1 CETCO Europe Ltd Birch House Scotts Quays Birkenhead Merseyside CH41 1FB Tel: Fax: website: APPROVAL INSPECTION TESTING CERTIFICATION TECHNICAL APPROVALS FOR CONSTRUCTION Agrément Certificate 86/1650 Product Sheet 1 VOLCLAY WATERPROOFING SYSTEM FOR STRUCTURES VOLTEX PRODUCT SCOPE AND SUMMARY OF CERTIFICATE This Certificate relates to Voltex, for use in waterproofing and damp-proofing underground reinforced concrete structures. AGRÉMENT CERTIFICATION INCLUDES: factors relating to compliance with Building Regulations where applicable factors relating to additional non-regulatory information where applicable independently verified technical specification assessment criteria and technical investigations design considerations installation guidance regular surveillance of production formal three-yearly review. KEY FACTORS ASSESSED Resistance to water and water vapour the system provides an effective barrier to the passage of liquid water and water vapour from the ground (see section 5). Resistance to puncturing the membrane is resistant to damage and has the ability to self-heal if punctured (see section 6). Durability when fully protected, the system provides an effective barrier to the transmission of water and water vapour for the life of the building in which it is incorporated (see section 11). The BBA has awarded this Agrément Certificate to the company named above for the system described herein. The system has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate. On behalf of the British Board of Agrément Date of First issue: 17 August 2009 Simon Wroe Greg Cooper Originally certificated on 30 June 1997 Head of Approvals Materials Chief Executive The BBA is a UKAS accredited certification body Number 113. The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at Readers are advised to check the validity and latest issue number of this Agrément Certificate by either referring to the BBA website or contacting the BBA direct. British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford mail@bba.star.co.uk Herts WD25 9BA 2009 website: Page 1 of 8

2 Regulations In the opinion of the BBA, Voltex, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations: The Building Regulations 2000 (as amended) (England and Wales) Requirement: A1 Requirement: C2(a) Requirement: Regulation 7 Loading When adequately confined, the system contributes to satisfying this Requirement. See section 8 of this Certificate. Resistance to moisture The system is an effective barrier to water and water vapour. See section 5 of this Certificate. Materials and workmanship The system is acceptable. See section 11 and the Installation part of this Certificate. The Building (Scotland) Regulations 2004 (as amended) Regulation: 8(1)(2) Fitness and durability of materials and workmanship The use of the system satisfies the requirements of this Regulation. See sections 10 and 11 and the Installation part of this Certificate. Regulation: 9 Building standards construction Standard: 1.1(a)(b) Structure The application of the system will not adversely affect the building s ability to transmit loadings, with reference to clauses (1)(2), (1)(2), (1)(2) and (1)(2). See section 8 of this Certificate. Standard: 3.4 Moisture from the ground The system is an effective barrier to liquid water and water vapour, with reference to clauses (1)(2), (1)(2), (1)(2), (1)(2) and (1)(2) respectively. See section 5 of this Certificate. Regulation: 12 Building standards conversions All comments given for this system under Regulation 9, also apply to this Regulation, with reference to clause (1)(2) and Schedule 6 (1)(2). (1) Technical Handbook (Domestic). (2) Technical Handbook (Non-Domestic). The Building Regulations (Northern Ireland) 2000 (as amended) Regulation: B2 Fitness of materials and workmanship The system is acceptable. See section 11 and the Installation part of this Certificate. Regulation: B3(2) Suitability of certain materials The system does not normally require maintenance. See section 10 of this Certificate. Regulation: C4(b) Resistance to ground moisture and weather The system is an effective barrier to liquid water and water vapour. See section 5 of this Certificate. Regulation: D1 Stability When adequately confined, the system contributes to satisfying this Requirement. See section 8 of this Certificate. Construction (Design and Management) Regulations 2007 Construction (Design and Management) Regulations (Northern Ireland) 2007 Information in this Certificate may assist the client, CDM co-ordinator, designer and contractors to address their obligation under these Regulations. See sections: 2 Delivery and site handling (2.1 to 2.4) and 4 Practicability of installation (4.3). Non-regulatory Information NHBC Standards 2008 NHBC accepts the use of Voltex, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors. Zurich Building Guarantee Technical Manual 2007 In the opinion of the BBA, Voltex, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements. Page 2 of 8

3 Technical Specification 1 Description 1.1 Voltex is a waterproofing membrane, approximately 6.4 mm thick, consisting of two polypropylene geotextiles, a woven fabric and non-woven fabric, enclosing granular sodium bentonite at a minimum weight of 4.88 kgm 2. The two geotextiles are interlocked by a needle-punching process pushing fibres from the non-woven layer through and beyond the woven layer. This process links the geotextiles and contains and confines the bentonite (see Figure 1). Figure 1 Cross-section through Voltex woven geotextile needle-punched geotextile fibres non-woven geotextile granular Volclay sodium bentonite 1.2 Voltex is manufactured in a controlled continuous process in which partially-hydrated bentonite granules are uniformly distributed between woven and non-woven geotextiles. A needle-punching process is applied, linking the geotextiles together and securing the bentonite granules within the membrane. 1.3 Other components used with Voltex include: Waterstop RX a black-extruded strip of sodium bentonite/butyl rubber backed with a silicone release paper and used as a water bar in construction joints and in conjunction with Voltex Bentoseal a trowel-grade sodium bentonite compound used for detailing work, eg around penetrations Voltex Granules a loose form of granular sodium bentonite used to prevent the seepage of water from backfill material or mixed with water and used as a paste for sealing. 1.4 Quality control is exercised over raw materials, during manufacture and on the final products. 2 Delivery and site handling 2.1 Voltex is supplied in 1.1 m wide by 5.0 m long rolls on pallets of 35 rolls, stacked horizontally and shrink wrapped. Each roll weighs between 33 kg to 38.5 kg (1). 2.2 Coils of Waterstop RX, 25 mm by 19 mm are packaged in cartons. Each carton contains six coils of 5 m length (1), each box weighs 25 kg. 2.3 Bentoseal is supplied in litre tubs (1), each tub weighs 18 kg. 2.4 Voltex Granules are supplied in 20 kg bags. 2.5 The product and components must be stored in dry conditions, under cover and away from the possibility of damage or premature contact with water. Waterstop RX should also be stored away from direct heat. (1) Weights and sizes are subject to change, users are advised to consult current manufacturer s literature. Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on Voltex. Page 3 of 8

4 Design Considerations 3 Use 3.1 Voltex is satisfactory for use in waterproofing and damp-proofing underground reinforced concrete structures, and is satisfactory for Type A reinforced concrete basement construction grades 2, 3 and 4 as defined in Table 1 of BS 8102 : The membrane stops the passage of water between the membrane and the concrete structure to which it is fixed. The membrane must be adequately confined to ensure a watertight seal is achieved in service. 3.3 Waterstop RX is satisfactory for use as a water bar in reinforced concrete construction joints, on Type B constructions as defined in Table 1 of BS 8102 : It is also used as an accessory in structures waterproofed with Voltex. 3.4 Waterstop RX is not designed for use in movement joints. 3.5 The product and components must never remain permanently exposed. 4 Practicability of installation 4.1 The system should only be installed by contractors who have been trained and approved by the Certificate holder. 4.2 The membrane is easy to handle and can be cut using a sharp knife. 4.3 Voltex may be applied under most normal site conditions, including subzero temperatures and during heavy rainfall. Under wet conditions the system can withstand light construction traffic without significant extrusion of the bentonite. Slight losses at the exposed edges of a lap joint will not impair the watertightness, provided the conditions given in section 12.3 are met. Any bentonite that extrudes from the membrane will become slippery when wet which can have an adverse effect on site safety. 4.4 Waterstop RX should not be applied during heavy rainfall or where there is free-standing water. 5 Resistance to water and water vapour The system provides an effective barrier to the passage of liquid water and water vapour from the ground. 6 Resistance to puncturing The polypropylene geotextiles containing the bentonite are robust and resistant to normal site activities. The dropping of heavy articles will normally have no damaging effect on the membrane. Any accidental cuts will self heal when the membrane is hydrated following correct installation, provided that bentonite material is not lost from the edges of the cut. If it is thought that bentonite material has been lost, Bentoseal can be applied over the damaged area or, if the damage is more extensive, the membrane should be replaced with fresh Voltex. 7 Chemical resistance 7.1 The gelling of sodium bentonite is adversely affected by the presence of electrolytes (particularly trivalent ions) and may also be affected by the presence of soluble cations such as those found in chalk or lime soils. In such cases advice should be sought from the Certificate holder. 7.2 The membrane is not affected by organic contaminants. 7.3 In chemically-contaminated areas the membrane is hydrated by deliberate soaking with mains water and leaving for two to three hours before placing the backfill or pouring the concrete. 8 Resistance to loading Provided the membrane is adequately confined, properly hydrated and not subject to point loading, an installation beneath a foundation slab will transmit dead and imposed loads to the ground safely and without excessive deformation. In situations where point loading is anticipated the Certificate holder s advice should be sought. 9 Adhesion When concrete is cast against the membrane the free ends of the needle-punched fibres become embedded in the concrete, creating a permanent bond between the concrete and membrane. 10 Maintenance As the system is confined by the concrete and has suitable durability (see section 11), maintenance is not required. 11 Durability A fully-protected Voltex membrane, when installed with the appropriate ancillary products, will provide an effective barrier to water and water vapour for the life of the building in which it is incorporated. Page 4 of 8

5 Installation 12 General 12.1 Voltex is installed with the woven geotextile in contact with the concrete surface to be waterproofed The system bonds to poured concrete to form an integral seal to prevent water migration and requires no priming, fillets or protection boards The formation of a continuous waterproof barrier is achieved using lap joints with a minimum overlap of 100 mm between adjoining edges and roll ends. It is recommended to stagger laps at a minimum of 300 mm to avoid four sheets overlapping in one location. All lap joints are secured by either stapling laps together, or fixing them to the base with fasteners Sealing around protrusions through the membrane, eg at such details as piles and service pipes, is accomplished by cutting a hole in the membrane and fitting over the protrusion, bedding the membrane onto either Bentoseal or a paste made up, in situ, by mixing Voltex Granules with water. 13 Procedure Voltex Vertical surfaces 13.1 Voltex can be installed either against the outside of existing walls, or preferably applied to the inside face of shuttering to be subsequently filled with poured concrete On cast concrete substrates, the product is aligned horizontally (although vertical alignment is possible) and fixed through the overlaps using proprietary washer-headed fasteners. When fixed to the inside face of shuttering, the product is aligned vertically (although horizontal alignment is possible) ensuring that all laps face down, away from the flow of the poured concrete. The overlaps are secured to the shuttering using nails or staples. A minimum overlap of 100 mm should be achieved between the vertical membrane and the membrane protruding from the base slab Backfilling should be carried out as soon as possible after placing the Voltex. Backfill material should be free from builders debris and angular aggregate, and should be compacted to a minimum 85% Modified Proctor After backfilling, the application of the membrane is continued. The membrane should not be installed above the intended final ground level and Voltex is terminated on the concrete structure at ground level. Horizontal surfaces 13.5 Surfaces to be waterproofed should be reasonably smooth and may be damp (but free from standing water). Earth and sand substrates should be compacted to a minimum 85% Modified Proctor At the edge of the slab the membrane should extend vertically a minimum of 300 mm above the top surface to form an overlap with the vertical membrane Overlaps should be stapled or nailed to prevent displacement during concrete placement The concrete slab to be poured should have a minimum thickness of 150 mm. Waterstop RX Surface preparation 13.9 Joint surfaces should be clean, dry and free from cavities and spalling. Any irregularities in the surface do not normally need to be filled. If required, these can be filled with a suitable strength cement grout or mortar while the concrete is still green, and made smooth Waterstop RX is positioned in the centre of the reinforced concrete construction joint, ensuring that a minimum of 75 mm concrete cover is provided to all sides of the product. Installation A strip of Waterstop RX is uncoiled and placed in position leaving the release paper temporarily intact so it can be pushed firmly in place into any undulations in the concrete surface (see Figure 2). Once sufficient product is positioned, the release paper is removed. Page 5 of 8

6 Figure 2 Waterstop RX installation details vertical wall joint Waterstop RX footing to wall joint kicker cast integrally with footing Waterstop RX Continuity of consecutive strips is maintained by butt jointing To prevent movement during concrete placement, the strips of Waterstop RX are covered by placing Revofix mesh over the product. The successive lengths of mesh are overlapped and fixed using nails at each overlap and at a spacing of approximately 300 mm in between. Swelling If the material exhibits considerable swelling prior to confinement in the joint, it must be replaced with new material. Concrete casting Casting of retaining walls and floor slabs is carried out immediately after fixing Waterstop RX in position. Technical Investigations 14 Tests Voltex 14.1 A trial installation was built and observations were made of the ease of installation at corners, laps and around obstructions, and the rate and pattern of water penetration Tests were conducted to determine: resistance to electrolytes resistance to rainfall (natural exposure) resistance to rainfall (cyclic water spray with simulated traffic) Tests were conducted (see Table 1) to determine: bond strength between Voltex and poured concrete stability of bentonite granules within the membrane during normal site handling. Table 1 Service performance Test Mean results Method (1) Bond strength (Nmm 1 ) 4.4 BS EN Stability (%) 1.75 BBA test method Hydraulic conductivity (cms 1 ) 1 x 10 9 ASTM D 5084 Low-temperature flexibility ( C) 29 ASTM D 1970 Hydrostatic pressure (kpa) 690 ASTM D 5385 Tensile strength (N) 329 ASTM D 4595 Puncture resistance (kg) 61.3 ASTM D 4833 Water vapour transmission zero transmission University of Hertfordshire Procedure (1) The test documents are detailed in the Bibliography. Page 6 of 8

7 Waterstop RX characterisation resistance to hydrostatic pressure Observations were made of the ease of installation, in particular around obstructions. 15 Investigations 15.1 The manufacturing process was examined, and the raw material specifications and quality control procedures established An assessment was made of independent reports (with the results given in Table 1) relating to: hydraulic conductivity under water pressure low-temperature flexibility resistance to hydrostatic pressure mechanical properties of the geotextiles water vapour transmission through hydrated membrane Visits were made to sites in progress to assess the application properties of the system A survey of contractors was conducted to assess the practicability of application and the performance in use Existing data on the effectiveness and durability of natural (Wyoming) sodium bentonite as a waterproofing membrane were examined An assessment was made of the original data resulting in the issue of Certificate 83/1081. Bibliography BS 8102 : 1990 Code of practice for protection of structures against water from the ground BS EN : 1993 Methods of test for adhesives 90º peel test for a flexible-to-rigid assembly ASTM D 1970 : 2000 Standard specification for self-adhering polymer modified bituminous sheet materials used as steep roofing underlayment for ice dam protection ASTM D 4595 : 1986 Test method for tensile properties of geotextiles by the wide-width strip method ASTM D 4833 : 2000 Test method for index puncture resistance of geotextiles, geomembranes and related products ASTM D 5084 : 2000 Test method for hydraulic conductivity of saturated porous materials using a flexible wall permeameter ASTM D 5385 : 1993 Test method for hydrostatic pressure resistance of waterproofing membranes Page 7 of 8

8 Conditions of Certification 16 Conditions 16.1 This Certificate: relates only to the product/system that is named and described on the front page is granted only to the company, firm or person named on the front page no other company, firm or person may hold or claim any entitlement to this Certificate is valid only within the UK has to be read, considered and used as a whole document it may be misleading and will be incomplete to be selective is copyright of the BBA is subject to English law Publications and documents referred to in this Certificate are those that the BBA deems to be relevant at the date of issue or re-issue of this Certificate and include any: Act of Parliament; Statutory Instrument; Directive; Regulation; British, European or International Standard; Code of Practice; manufacturers instructions; or any other publication or document similar or related to the aforementioned This Certificate will remain valid for an unlimited period provided that the product/system and the manufacture and/or fabrication including all related and relevant processes thereof: are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine are reviewed by the BBA as and when it considers appropriate In granting this Certificate, the BBA is not responsible for: the presence or absence of any patent, intellectual property or similar rights subsisting in the product/system or any other product/system the right of the Certificate holder to manufacture, supply, install, maintain or market the product/system individual installations of the product/system, including the nature, design, methods and workmanship of or related to the installation the actual works in which the product/system is installed, used and maintained, including the nature, design, methods and workmanship of such works Any information relating to the manufacture, supply, installation, use and maintenance of this product/system which is contained or referred to in this Certificate is the minimum required to be met when the product/system is manufactured, supplied, installed, used and maintained. It does not purport in any way to restate the requirements of the Health & Safety at Work etc Act 1974, or of any other statutory, common law or other duty which may exist at the date of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care. In granting this Certificate, the BBA does not accept responsibility to any person or body for any loss or damage, including personal injury, arising as a direct or indirect result of the manufacture, supply, installation, use and maintenance of this product/system. British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford mail@bba.star.co.uk Herts WD25 9BA 2009 website: Page 8 of 8

9 CETCO Europe Ltd Birch House Scotts Quays Birkenhead Merseyside CH41 1FB Tel: Fax: website: APPROVAL INSPECTION TESTING CERTIFICATION TECHNICAL APPROVALS FOR CONSTRUCTION Agrément Certificate 86/1650 Product Sheet 2 VOLCLAY WATERPROOFING SYSTEM FOR STRUCTURES WATERSTOP RX PRODUCT SCOPE AND SUMMARY OF CERTIFICATE This Certificate relates to Waterstop RX, a sodium bentonite/butyl rubber water bar for use in waterproofing and damp-proofing construction joints in underground structures. AGRÉMENT CERTIFICATION INCLUDES: factors relating to compliance with Building Regulations where applicable factors relating to additional non-regulatory information where applicable independently verified technical specification assessment criteria and technical investigations design considerations installation guidance regular surveillance of production formal three-yearly review. KEY FACTORS ASSESSED Resistance to water pressure the product provides an effective barrier to the passage of liquid water from the ground in construction joints (see section 5). Durability when fully protected, the product provides an effective barrier to the transmission of water in construction joints for the life of the building in which it is incorporated (see section 7). The BBA has awarded this Agrément Certificate to the company named above for the product described herein. The product has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate. On behalf of the British Board of Agrément Date of First issue: 17 August 2009 Simon Wroe Greg Cooper Originally certificated on 18 June 1986 Head of Approvals Materials Chief Executive The BBA is a UKAS accredited certification body Number 113. The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at Readers are advised to check the validity and latest issue number of this Agrément Certificate by either referring to the BBA website or contacting the BBA direct. British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford mail@bba.star.co.uk Herts WD25 9BA 2009 website: Page 1 of 6

10 Regulations In the opinion of the BBA, Waterstop RX, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations: The Building Regulations 2000 (as amended) (England and Wales) Requirement: C2(a) Requirement: Regulation 7 Resistance to moisture The product is an effective barrier to water in construction joints. See section 5 of this Certificate. Materials and workmanship The product is acceptable. See section 7 and the Installation part of this Certificate. The Building (Scotland) Regulations 2004 (as amended) Regulation: 8(1)(2) Fitness and durability of materials and workmanship The use of the product satisfies the requirements of this Regulation. See sections 6 and 7 and the Installation part of this Certificate. Regulation: 9 Building standards construction Standard: 3.4 Moisture from the ground The product is an effective barrier to water in construction joints, with reference to clauses (1)(2), (1)(2), (1)(2), (1)(2) and (1)(2) respectively. See section 5 of this Certificate. Regulation: 12 Building standards conversions All comments given for this product under Regulation 9, also apply to this Regulation, with reference to clause (1)(2) and Schedule 6 (1)(2). (1) Technical Handbook (Domestic). (2) Technical Handbook (Non-Domestic). The Building Regulations (Northern Ireland) 2000 (as amended) Regulation: B2 Fitness of materials and workmanship The product is acceptable. See section 7 and the Installation part of this Certificate. Regulation: B3(2) Suitability of certain materials The product does not normally require maintenance. See section 6 of this Certificate. Regulation: C4(b) Resistance to ground moisture and weather The product is an effective barrier to water in construction joints. See section 5 of this Certificate. Construction (Design and Management) Regulations 2007 Construction (Design and Management) Regulations (Northern Ireland) 2007 Information in this Certificate may assist the client, CDM co-ordinator, designer and contractors to address their obligation under these Regulations. See section: 2 Delivery and site handling (2.1). Non-regulatory Information NHBC Standards 2008 NHBC accepts the use of Waterstop RX, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors. Zurich Building Guarantee Technical Manual 2007 In the opinion of the BBA, Waterstop RX, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements. Technical Specification 1 Description 1.1 Waterstop RX is a black, extruded strip of sodium bentonite/butyl rubber with dimensions 25 mm by 20 mm and 15 mm by 10 mm cross-section, with one side backed by a silicone treated paper. 1.2 Quality control is exercised over raw materials, during manufacture and on the final product. Page 2 of 6

11 2 Delivery and site handling 2.1 Coils of Waterstop RX are packaged in cartons, each carton contains six coils of 5 m length (1), each box weighs 25 kg. (1) Weights and sizes are subject to change, users are advised to consult current manufacturer s literature. 2.2 The product should be stored away from direct heat, in dry conditions, under cover and away from the possibility of damage or premature contact with water. Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on Waterstop RX. Design Considerations 3 Use The product is satisfactory for use as a water bar; as part of a Volclay waterproofing installation, for Type A basement construction in grades 2, 3 and 4 as defined in Table 1 of BS 8102 : 1990, for construction joints in reinforced concrete structures, or for Type B structures as defined in BS 8102 to waterproof basements. 4 Practicability of installation 4.1 The system should only be installed by contractors who have been trained and approved by the Certificate holder. 4.2 Waterstop RX should not be applied during heavy rainfall or where there is free-standing water. 5 Resistance to water pressure Both in its original condition and after hydration, Waterstop RX provides an effective barrier to liquid water in construction joints of reinforced concrete. 6 Maintenance As the product is confined by the concrete and has suitable durability (see section 7), maintenance is not required. 7 Durability When fully protected, Waterstop RX, provides an effective barrier to the transmission of liquid water in construction joints, for the life of the building in which it is incorporated. Installation 8 General 8.1 Waterstop RX should not be applied during heavy rainfall or where there is free-standing water. 8.2 The product is not designed for use in movement joints. 8.3 The product must never remain permanently exposed. 9 Procedure Surface preparation 9.1 Joint surfaces should be clean, dry and free from cavities and spalling. Any irregularities in the surface do not normally need to be filled. If required, these can be filled with a suitable strength cement grout or mortar while the concrete is still green, and made smooth. 9.2 Waterstop RX is positioned in the centre of the reinforced concrete construction joint, ensuring that a minimum of 75 mm concrete cover is provided to all sides of the product. Installation 9.3 A strip of Waterstop RX is uncoiled and placed in position leaving the release paper temporarily intact so it can be pushed firmly in place into any undulations in the concrete surface (see Figure 1). Once sufficient product is positioned, the release paper is removed. Page 3 of 6

12 Figure 1 Waterstop RX installation details vertical wall joint Waterstop RX footing to wall joint kicker cast integrally with footing Waterstop RX 9.4 Continuity of consecutive strips is maintained by butt jointing. 9.5 To prevent movement during concrete placement, the strips of Waterstop RX are covered by placing Revofix mesh over the product. The successive lengths of mesh are overlapped and fixed using nails at each overlap and at a spacing of approximately 300 mm in between. Swelling 9.6 If the material exhibits considerable swelling prior to confinement in the joint, it must be replaced with new material. Concrete casting 9.7 Casting of retaining walls and floor slabs is carried out immediately after fixing Waterstop RX in position. Technical Investigations 10 Tests The following tests were carried out: characterisation resistance to hydrostatic pressure, and observations were made of the ease of installation, in particular around obstructions. 11 Investigations 11.1 Details were obtained of the manufacturing process, including the methods adopted for quality control Existing data on the effectiveness and durability of natural (Wyoming) sodium bentonite as a waterproofing membrane were examined Visits were made to a site in progress to assess the practicability of installation A survey of known users was conducted to assess the performance in use An assessment was made of the original data resulting in the issue of Certificate 83/1081. Bibliography BS 8102 : 1990 Code of practice for protection of structures against water from the ground Page 4 of 6

13 Conditions of Certification 12 Conditions 12.1 This Certificate: relates only to the product/system that is named and described on the front page is granted only to the company, firm or person named on the front page no other company, firm or person may hold or claim any entitlement to this Certificate is valid only within the UK has to be read, considered and used as a whole document it may be misleading and will be incomplete to be selective is copyright of the BBA is subject to English law Publications and documents referred to in this Certificate are those that the BBA deems to be relevant at the date of issue or re-issue of this Certificate and include any: Act of Parliament; Statutory Instrument; Directive; Regulation; British, European or International Standard; Code of Practice; manufacturers instructions; or any other publication or document similar or related to the aforementioned This Certificate will remain valid for an unlimited period provided that the product/system and the manufacture and/or fabrication including all related and relevant processes thereof: are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine are reviewed by the BBA as and when it considers appropriate In granting this Certificate, the BBA is not responsible for: the presence or absence of any patent, intellectual property or similar rights subsisting in the product/system or any other product/system the right of the Certificate holder to manufacture, supply, install, maintain or market the product/system individual installations of the product/system, including the nature, design, methods and workmanship of or related to the installation the actual works in which the product/system is installed, used and maintained, including the nature, design, methods and workmanship of such works Any information relating to the manufacture, supply, installation, use and maintenance of this product/system which is contained or referred to in this Certificate is the minimum required to be met when the product/system is manufactured, supplied, installed, used and maintained. It does not purport in any way to restate the requirements of the Health & Safety at Work etc Act 1974, or of any other statutory, common law or other duty which may exist at the date of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care. In granting this Certificate, the BBA does not accept responsibility to any person or body for any loss or damage, including personal injury, arising as a direct or indirect result of the manufacture, supply, installation, use and maintenance of this product/system. Page 5 of 6

14 British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford Herts WD25 9BA 2009 website: Page 6 of 6

15 CETCO Europe Ltd Birch House Scotts Quays Birkenhead Merseyside CH41 1FB Tel: Fax: website: APPROVAL INSPECTION TESTING CERTIFICATION TECHNICAL APPROVALS FOR CONSTRUCTION Agrément Certificate 86/1650 Product Sheet 3 VOLCLAY WATERPROOFING SYSTEM FOR STRUCTURES VOLTEX DS PRODUCT SCOPE AND SUMMARY OF CERTIFICATE This Certificate relates to Voltex DS, for use in waterproofing and damp-proofing underground reinforced concrete structures. AGRÉMENT CERTIFICATION INCLUDES: factors relating to compliance with Building Regulations where applicable factors relating to additional non-regulatory information where applicable independently verified technical specification assessment criteria and technical investigations design considerations installation guidance regular surveillance of production formal three-yearly review. KEY FACTORS ASSESSED Resistance to water and water vapour the system provides an effective barrier to the passage of liquid water and water vapour from the ground (see section 5). Resistance to puncturing the membrane is resistant to damage and has the ability to self-heal if punctured (see section 6). Durability when fully protected, the system provides an effective barrier to the transmission of water and water vapour for the life of the building in which it is incorporated (see section 11). The BBA has awarded this Agrément Certificate to the company named above for the system described herein. The system has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate. On behalf of the British Board of Agrément Date of First issue: 17 August 2009 Simon Wroe Greg Cooper Originally certificated on 25 June 2004 Head of Approvals Materials Chief Executive The BBA is a UKAS accredited certification body Number 113. The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at Readers are advised to check the validity and latest issue number of this Agrément Certificate by either referring to the BBA website or contacting the BBA direct. British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford mail@bba.star.co.uk Herts WD25 9BA 2009 website: Page 1 of 8

16 Regulations In the opinion of the BBA, Voltex DS, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations: The Building Regulations 2000 (as amended) (England and Wales) Requirement: A1 Requirement: C2(a) Requirement: Regulation 7 Loading When adequately confined, the system contributes to satisfying this Requirement. See section 8 of this Certificate. Resistance to moisture The system is an effective barrier to water and water vapour. See section 5 of this Certificate. Materials and workmanship The system is acceptable. See section 11 and the Installation part of this Certificate. The Building (Scotland) Regulations 2004 (as amended) Regulation: 8(1)(2) Fitness and durability of materials and workmanship The use of the system satisfies the requirements of this Regulation. See sections 10 and 11 and the Installation part of this Certificate. Regulation: 9 Building standards construction Standard: 1.1(a)(b) Structure The application of the system will not adversely affect the building s ability to transmit loadings, with reference to clauses (1)(2), (1)(2), (1)(2) and (1)(2). See section 8 of this Certificate. Standard: 3.4 Moisture from the ground The system is an effective barrier to liquid water and water vapour, with reference to clauses (1)(2), (1)(2), (1)(2), (1)(2) and (1)(2) respectively. See section 5 of this Certificate. Regulation: 12 Building standards conversions All comments given for this system under Regulation 9, also apply to this Regulation, with reference to clause (1)(2) and Schedule 6 (1)(2). (1) Technical Handbook (Domestic). (2) Technical Handbook (Non-Domestic). The Building Regulations (Northern Ireland) 2000 (as amended) Regulation: B2 Fitness of materials and workmanship The system is acceptable. See section 11 and the Installation part of this Certificate. Regulation: B3(2) Suitability of certain materials The system does not normally require maintenance. See section 10 of this Certificate. Regulation: C4(b) Resistance to ground moisture and weather The system is an effective barrier to liquid water and water vapour. See section 5 of this Certificate. Regulation: D1 Stability When adequately confined, the system contributes to satisfying this Requirement. See section 8 of this Certificate. Construction (Design and Management) Regulations 2007 Construction (Design and Management) Regulations (Northern Ireland) 2007 Information in this Certificate may assist the client, CDM co-ordinator, designer and contractors to address their obligation under these Regulations. See sections: 2 Delivery and site handling (2.1 to 2.4) and 4 Practicability of installation (4.3). Non-regulatory Information NHBC Standards 2008 NHBC accepts the use of Voltex DS, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors. Zurich Building Guarantee Technical Manual 2007 In the opinion of the BBA, Voltex DS, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements. Page 2 of 8

17 Technical Specification 1 Description 1.1 Voltex DS is a waterproofing membrane, approximately 6.4 mm thick, consisting of two polypropylene geotextiles, a woven fabric and non-woven fabric, enclosing granular sodium bentonite at a minimum weight of 4.88 kgm 2. The two geotextiles are interlocked by a needle-punching process pushing fibres from the non-woven layer through and beyond the woven layer. This process links the geotextiles and contains and confines the bentonite. An HDPE liner is integrally bonded to the non-woven geotextile (see Figure 1). Figure 1 Cross-section through Voltex DS woven geotextile needle-punched geotextile fibres non-woven geotextile HDPE liner granular Volclay sodium bentonite 1.2 Voltex DS is manufactured in a controlled continuous process. Quality control tests are carried out on the separate components of the system, and on the finished membrane. 1.3 Other components used with Voltex DS include: Waterstop RX a black, extruded strip of sodium bentonite/butyl rubber backed with a silicone release paper and used as a water bar in construction joints and in conjunction with Voltex DS Bentoseal a trowel-grade sodium bentonite compound used for detailing work, eg around penetrations Voltex Granules a loose form of granular sodium bentonite used to prevent the seepage of water from backfill material or mixed with water and used as a paste for sealing. 1.4 Quality control is exercised over raw materials, during manufacture and on the final products. 2 Delivery and site handling 2.1 Voltex DS is supplied in 1.1 m wide by 5.0 m long rolls on pallets of 35 rolls, stacked horizontally and shrink wrapped. Each roll weighs between 35 kg to 40 kg (1). 2.2 Coils of Waterstop RX, 25 mm by 19 mm are packaged in cartons. Each carton contains six coils of 5 m length (1), each box weighs 25 kg. 2.3 Bentoseal is supplied in litre tubs (1), each tub weighs 18 kg. 2.4 Voltex Granules are supplied in 20 kg bags. 2.5 The product and components must be stored in dry conditions, under cover and away from the possibility of damage or premature contact with water. Waterstop RX should also be stored away from direct heat. (1) Weights and sizes are subject to change, users are advised to consult current manufacturer s literature. Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on Voltex DS. Page 3 of 8

18 Design Considerations 3 Use 3.1 Voltex DS is satisfactory for use in waterproofing and damp-proofing underground reinforced concrete structures and is satisfactory for Type A reinforced concrete basement construction grades 2, 3 and 4 as defined in Table 1 of BS 8102 : The membrane will not permit the passage of water between the membrane and the concrete structure to which it is fixed. The membrane must be adequately confined to ensure a watertight seal is achieved in service. 3.3 Waterstop RX is satisfactory for use as a water bar in reinforced concrete construction joints, on Type B constructions as defined in Table 1 of BS 8102 : It is also used as an accessory in structures waterproofed with Voltex DS. 3.4 Waterstop RX is not designed for use in movement joints. 3.5 The product and components must never remain permanently exposed. 4 Practicability of installation 4.1 The system should only be installed by contractors who have been trained and approved by the Certificate holder. 4.2 The membrane is easy to handle and can be cut using a sharp knife. 4.3 Voltex DS may be applied under most normal site conditions, including subzero temperatures and during heavy rainfall. Under wet conditions the system can withstand light construction traffic without significant extrusion of the bentonite. Slight losses at the exposed edges of a lap joint will not impair the watertightness, provided the conditions given in section 12.3 are met. Any bentonite that extrudes from the membrane will become slippery when wet which can have an adverse effect on site safety. 4.4 Waterstop RX should not be applied during heavy rainfall or where there is free-standing water. 5 Resistance to water and water vapour The system provides an effective barrier to the passage of liquid water and water vapour from the ground. 6 Resistance to puncturing The system is robust and resistant to normal site activities. The dropping of heavy articles will normally have no damaging effect on the membrane. Any accidental cuts will self heal when the membrane is hydrated following correct installation, provided that bentonite material is not lost from the edges of the cut. If bentonite material has or may have been lost, a patch of Voltex DS is applied, and secured by nailing over the damaged area, ensuring that the patch extends a minimum of 100 mm each side of the damaged area. If the damage is more extensive, the membrane should be replaced with fresh Voltex DS. 7 Chemical resistance 7.1 The gelling of sodium bentonite is adversely affected by the presence of electrolytes (particularly trivalent ions) and may also be affected by the presence of soluble cations such as those found in chalk or lime soils. In such cases advice should be sought from the Certificate holder. 7.2 The membrane is not affected by organic contaminants. 7.3 In chemically-contaminated areas the membrane is hydrated by deliberate soaking with mains water and leaving for two to three hours before placing the backfill or pouring the concrete. 8 Resistance to loading Provided the membrane is adequately confined, properly hydrated and not subject to point loading, an installation beneath a foundation slab will transmit dead and imposed loads to the ground safely and without excessive deformation. In situations where point loading is anticipated the Certificate holder s advice should be sought. 9 Adhesion When concrete is cast against the membrane the free ends of the needle-punched fibres become embedded in the concrete, creating a permanent bond between the concrete and membrane. 10 Maintenance As the system is confined by the concrete and has suitable durability (see section 11), maintenance is not required. Page 4 of 8

19 11 Durability A fully-protected Voltex DS membrane, when installed with the appropriate ancillary products, will provide an effective barrier to water and water vapour for the life of the building in which it is incorporated. Installation 12 General 12.1 Voltex DS is installed with the woven geotextile in contact with the concrete surface to be waterproofed The system bonds to poured concrete to form an integral seal to prevent water migration and requires no priming, fillets or protection boards The formation of a continuous waterproof barrier is achieved using lap joints with a minimum overlap of 100 mm between adjoining edges and 300 mm between roll ends. It is recommended to stagger laps at a minimum of 300 mm to avoid four sheets overlapping in one location. All lap joints are secured by either stapling laps together, or fixing them to the base with fasteners Sealing around protrusions through the membrane, eg at such details as piles and service pipes, is accomplished by cutting a hole in the membrane and fitting over the protrusion, bedding the membrane onto either Bentoseal or a paste made up, in situ, by mixing Voltex Granules with water. 13 Procedure Voltex DS Vertical surfaces 13.1 Voltex DS can be installed either against the outside of existing walls, or preferably applied to the inside face of shuttering to be subsequently filled with poured concrete On cast concrete substrates, the product is aligned horizontally (although vertical alignment is possible) and fixed through the overlaps using proprietary washer-headed fasteners. When fixed to the inside face of shuttering, the product is aligned vertically (although horizontal alignment is possible) ensuring that all laps face down, away from the flow of the poured concrete. The overlaps are secured to the shuttering using nails or staples. A minimum overlap of 100 mm should be achieved between the vertical membrane and the membrane protruding from the base slab Backfilling should be carried out as soon as possible after placing the Voltex DS. Backfill material should be free from builders debris and angular aggregate, and should be compacted to a minimum 85% Modified Proctor After backfilling, the application of the membrane is continued. The membrane should not be installed above the intended final ground level and Voltex DS is terminated on the concrete structure at ground level. Horizontal surfaces 13.5 Surfaces to be waterproofed should be reasonably smooth and may be damp (but free from standing water). Earth and sand substrates should be compacted to a minimum 85% Modified Proctor At the edge of the slab the membrane should extend vertically a minimum of 300 mm above the top surface to form an overlap with the vertical membrane Overlaps should be stapled or nailed to prevent displacement during concrete placement The concrete slab to be poured should have a minimum thickness of 150 mm. Waterstop RX Surface preparation 13.9 Joint surfaces should be clean, dry and free from cavities and spalling. Any irregularities in the surface do not normally need to be filled. If required, these can be filled with a suitable strength cement grout or mortar while the concrete is still green, and made smooth Waterstop RX is positioned in the centre of the reinforced concrete construction joint, ensuring that a minimum of 75 mm concrete cover is provided to all sides of the product. Installation A strip of Waterstop RX is uncoiled and placed in position leaving the release paper temporarily intact so it can be pushed firmly in place into any undulations in the concrete surface (see Figure 2). Once sufficient product is positioned, the release paper is removed. Page 5 of 8

20 Figure 2 Waterstop RX installation details vertical wall joint Waterstop RX footing to wall joint kicker cast integrally with footing Waterstop RX Continuity of consecutive strips is maintained by butt jointing To prevent movement during concrete placement, the strips of Waterstop RX are covered by placing Revofix mesh over the product. The successive lengths of mesh are overlapped and fixed using nails at each overlap and at a spacing of approximately 300 mm in between. Swelling If the material exhibits considerable swelling prior to confinement in the joint, it must be replaced with new material. Concrete casting Casting of retaining walls and floor slabs is carried out immediately after fixing Waterstop RX in position. Technical Investigations 14 Tests Tests were conducted to determine: resistance of lap joints to water penetration resistance to puncture damage weight per unit area of bentonite. resistance to rainfall (natural exposure) weight per unit area of the membrane 15 Investigations 15.1 The manufacturing process was examined, and the raw material specifications and quality control procedures established An assessment was made of existing data relating to the performance of the bentonite geotextile An assessment was made of the original data resulting in the issue of Certificate 83/1081. Bibliography BS 8102 : 1990 Code of practice for protection of structures against water from the ground Page 6 of 8

21 Conditions of Certification 16 Conditions 16.1 This Certificate: relates only to the product/system that is named and described on the front page is granted only to the company, firm or person named on the front page no other company, firm or person may hold or claim any entitlement to this Certificate is valid only within the UK has to be read, considered and used as a whole document it may be misleading and will be incomplete to be selective is copyright of the BBA is subject to English law Publications and documents referred to in this Certificate are those that the BBA deems to be relevant at the date of issue or re-issue of this Certificate and include any: Act of Parliament; Statutory Instrument; Directive; Regulation; British, European or International Standard; Code of Practice; manufacturers instructions; or any other publication or document similar or related to the aforementioned This Certificate will remain valid for an unlimited period provided that the product/system and the manufacture and/or fabrication including all related and relevant processes thereof: are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine are reviewed by the BBA as and when it considers appropriate In granting this Certificate, the BBA is not responsible for: the presence or absence of any patent, intellectual property or similar rights subsisting in the product/system or any other product/system the right of the Certificate holder to manufacture, supply, install, maintain or market the product/system individual installations of the product/system, including the nature, design, methods and workmanship of or related to the installation the actual works in which the product/system is installed, used and maintained, including the nature, design, methods and workmanship of such works Any information relating to the manufacture, supply, installation, use and maintenance of this product/system which is contained or referred to in this Certificate is the minimum required to be met when the product/system is manufactured, supplied, installed, used and maintained. It does not purport in any way to restate the requirements of the Health & Safety at Work etc Act 1974, or of any other statutory, common law or other duty which may exist at the date of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care. In granting this Certificate, the BBA does not accept responsibility to any person or body for any loss or damage, including personal injury, arising as a direct or indirect result of the manufacture, supply, installation, use and maintenance of this product/system. Page 7 of 8

22 British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford Herts WD25 9BA 2009 website: Page 8 of 8

23 CETCO Europe Ltd Birch House Scotts Quays Birkenhead Merseyside CH41 1FB Tel: Fax: website: APPROVAL INSPECTION TESTING CERTIFICATION TECHNICAL APPROVALS FOR CONSTRUCTION Agrément Certificate 86/1650 Product Sheet 4 VOLCLAY WATERPROOFING SYSTEM FOR STRUCTURES REDSTOP WATERSTOP PRODUCT SCOPE AND SUMMARY OF CERTIFICATE This Certificate relates to Redstop Waterstop a sodium bentonite/butyl rubber water bar, for use in waterproofing and damp-proofing construction joints in underground structures. AGRÉMENT CERTIFICATION INCLUDES: factors relating to compliance with Building Regulations where applicable factors relating to additional non-regulatory information where applicable independently verified technical specification assessment criteria and technical investigations design considerations installation guidance regular surveillance of production formal three-yearly review. KEY FACTORS ASSESSED Resistance to water and water vapour the product provides an effective barrier to the passage of liquid water from the ground in construction joints (see section 5). Durability when fully protected, the product provides an effective barrier to the transmission of water in construction joints for the life of the building in which it is incorporated (see section 7). The BBA has awarded this Agrément Certificate to the company named above for the product described herein. The product has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate. On behalf of the British Board of Agrément Date of First issue: 17 August 2009 Simon Wroe Greg Cooper Originally certificated on 30 June 1997 Head of Approvals Materials Chief Executive The BBA is a UKAS accredited certification body Number 113. The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at Readers are advised to check the validity and latest issue number of this Agrément Certificate by either referring to the BBA website or contacting the BBA direct. British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford mail@bba.star.co.uk Herts WD25 9BA 2009 website: Page 1 of 6

24 Regulations In the opinion of the BBA, Redstop Waterstop, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations: The Building Regulations 2000 (as amended) (England and Wales) Requirement: C2(a) Requirement: Regulation 7 Resistance to moisture The product is an effective barrier to water in construction joints. See section 5 of this Certificate. Materials and workmanship The product is acceptable. See section 7 and the Installation part of this Certificate. The Building (Scotland) Regulations 2004 (as amended) Regulation: 8(1)(2) Fitness and durability of materials and workmanship The use of the product satisfies the requirements of this Regulation. See sections 6 and 7 and the Installation part of this Certificate. Regulation: 9 Building standards construction Standard: 3.4 Moisture from the ground The product is an effective barrier to water in construction joints, with reference to clauses (1)(2), (1)(2), (1)(2), (1)(2) and (1)(2) respectively. See section 5 of this Certificate. Regulation: 12 Building standards conversions All comments given for this product under Regulation 9, also apply to this Regulation, with reference to clause (1)(2) and Schedule 6 (1)(2). (1) Technical Handbook (Domestic). (2) Technical Handbook (Non-Domestic). The Building Regulations (Northern Ireland) 2000 (as amended) Regulation: B2 Fitness of materials and workmanship The product is acceptable. See section 7 and the Installation part of this Certificate. Regulation: B3(2) Suitability of certain materials The product does not normally require maintenance. See section 6 of this Certificate. Regulation: C4(b) Resistance to ground moisture and weather The product is an effective barrier to water in construction joints. See section 5 of this Certificate. Construction (Design and Management) Regulations 2007 Construction (Design and Management) Regulations (Northern Ireland) 2007 Information in this Certificate may assist the client, CDM co-ordinator, designer and contractors to address their obligation under these Regulations. See section: 2 Delivery and site handling (2.1). Non-regulatory Information NHBC Standards 2008 NHBC accepts the use of Redstop Waterstop, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors. Zurich Building Guarantee Technical Manual 2007 In the opinion of the BBA, Redstop Waterstop, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements. Page 2 of 6

25 Technical Specification 1 Description 1.1 Redstop Waterstop is a black extruded strip of sodium bentonite/butyl rubber with dimensions 25 mm by 20 mm and 15 mm by 10 mm cross-section, with one side backed by a silicone treated paper. 1.2 Quality control is exercised over raw materials, during manufacture and on the final product. 2 Delivery and site handling 2.1 Coils of Redstop Waterstop are packaged in cartons, each carton contains six coils of 5 m length (1), each box weighs 25 kg. (1) Weights and sizes are subject to change, users are advised to consult current manufacturer s literature. 2.2 The product must be stored away from direct heat, in dry conditions, under cover and away from the possibility of damage or premature contact with water. Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on Redstop Waterstop. Design Considerations 3 Use The product is satisfactory for use as a water bar: as part of a Volclay waterproofing installation, for Type A basement construction grades 2, 3 and 4 as defined in Table 1 of BS 8102 : 1990, for construction joints in reinforced concrete structures, or for Type B structures as defined in BS 8102 to waterproof basements. 4 Practicability of installation 4.1 The system should only be installed by contractors who have been trained and approved by the Certificate holder. 4.2 Redstop Waterstop should not be applied during heavy rainfall or where there is free-standing water. 5 Resistance to water pressure Both in its original condition and after hydration, Volclay Redstop Waterstop will provide an effective barrier to liquid water in construction joints of reinforced concrete. 6 Maintenance As the product is confined by the concrete and has suitable durability (see section 7), maintenance is not required. 7 Durability When fully protected, Redstop Waterstop, will provide an effective barrier to the transmission of liquid water in construction joints, for the life of the building in which it is incorporated. Installation 8 General 8.1 Redstop Waterstop should not be applied during heavy rainfall or where there is free-standing water. 8.2 The product is not designed for use in movement joints. 8.3 The product must never remain permanently exposed. Page 3 of 6

26 9 Procedure Surface preparation 9.1 Joint surfaces should be clean, dry and free from cavities and spalling. Any irregularities in the surface do not normally need to be filled. If required, these can be filled with a suitable strength cement grout or mortar while the concrete is still green, and made smooth. 9.2 Redstop Waterstop is positioned in the centre of the reinforced concrete construction joint, ensuring that a minimum of 75 mm concrete cover is provided to all sides of the product. Installation 9.3 A strip of Redstop Waterstop is uncoiled and placed in position leaving the release paper temporarily intact so it can be pushed firmly in place into any undulations in the concrete surface (see Figure 1). Once sufficient product is positioned, the release paper is removed. Figure 1 Redstop Waterstop installation details 9.4 Continuity of consecutive strips is maintained by butt jointing. 9.5 To prevent movement during concrete placement, the strips of Redstop Waterstop are covered by placing Revofix mesh over the product. The successive lengths of mesh are overlapped and fixed using nails at each overlap and at a spacing of approximately 300 mm in between. Swelling 9.6 If the material exhibits considerable swelling prior to confinement in the joint, it must be replaced with new material. Concrete casting 9.7 Casting of retaining walls and floor slabs is carried out immediately after fixing Redstop Waterstop in position. Technical Investigations 10 Tests The following tests were carried out: characterisation resistance to hydrostatic pressure, and observations were made of the ease of installation, in particular around obstructions. 11 Investigations 11.1 Details were obtained of the manufacturing process, including the methods adopted for quality control Existing data on the effectiveness and durability of natural (Wyoming) sodium bentonite as a waterproofing membrane were examined Visits were made to a site in progress to assess the practicability of installation A survey of known users was conducted to assess the performance in use An assessment was made of the original data resulting in the issue of Certificate 83/1081. Page 4 of 6

27 Bibliography BS 8102 : 1990 Code of practice for protection of structures against water from the ground Page 5 of 6

28 Conditions of Certification 12 Conditions 12.1 This Certificate: relates only to the product/system that is named and described on the front page is granted only to the company, firm or person named on the front page no other company, firm or person may hold or claim any entitlement to this Certificate is valid only within the UK has to be read, considered and used as a whole document it may be misleading and will be incomplete to be selective is copyright of the BBA is subject to English law Publications and documents referred to in this Certificate are those that the BBA deems to be relevant at the date of issue or re-issue of this Certificate and include any: Act of Parliament; Statutory Instrument; Directive; Regulation; British, European or International Standard; Code of Practice; manufacturers instructions; or any other publication or document similar or related to the aforementioned This Certificate will remain valid for an unlimited period provided that the product/system and the manufacture and/or fabrication including all related and relevant processes thereof: are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine are reviewed by the BBA as and when it considers appropriate In granting this Certificate, the BBA is not responsible for: the presence or absence of any patent, intellectual property or similar rights subsisting in the product/system or any other product/system the right of the Certificate holder to manufacture, supply, install, maintain or market the product/system individual installations of the product/system, including the nature, design, methods and workmanship of or related to the installation the actual works in which the product/system is installed, used and maintained, including the nature, design, methods and workmanship of such works Any information relating to the manufacture, supply, installation, use and maintenance of this product/system which is contained or referred to in this Certificate is the minimum required to be met when the product/system is manufactured, supplied, installed, used and maintained. It does not purport in any way to restate the requirements of the Health & Safety at Work etc Act 1974, or of any other statutory, common law or other duty which may exist at the date of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care. In granting this Certificate, the BBA does not accept responsibility to any person or body for any loss or damage, including personal injury, arising as a direct or indirect result of the manufacture, supply, installation, use and maintenance of this product/system. British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford mail@bba.star.co.uk Herts WD25 9BA 2009 website: Page 6 of 6

29 CETCO Europe Ltd Birch House Scotts Quays Birkenhead Merseyside CH41 1FB Tel: Fax: website: APPROVAL INSPECTION TESTING CERTIFICATION TECHNICAL APPROVALS FOR CONSTRUCTION Agrément Certificate 86/1650 Product Sheet 5 VOLCLAY WATERPROOFING SYSTEM FOR STRUCTURES BIGSTOP WATERSTOP PRODUCT SCOPE AND SUMMARY OF CERTIFICATE This Certificate relates to Bigstop Waterstop, a sodium bentonite/butyl rubber water bar for use in waterproofing and damp-proofing construction joints in underground structures. AGRÉMENT CERTIFICATION INCLUDES: factors relating to compliance with Building Regulations where applicable factors relating to additional non-regulatory information where applicable independently verified technical specification assessment criteria and technical investigations design considerations installation guidance regular surveillance of production formal three-yearly review. KEY FACTORS ASSESSED Resistance to water and water vapour the product provides an effective barrier to the passage of liquid water from the ground in construction joints (see section 5). Durability when fully protected, the product provides an effective barrier to the transmission of water in construction joints for the life of the building in which it is incorporated (see section 7). The BBA has awarded this Agrément Certificate to the company named above for the product described herein. The product has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate. On behalf of the British Board of Agrément Date of First issue: 17 August 2009 Simon Wroe Greg Cooper Originally certificated on 31 May 2000 Head of Approvals Materials Chief Executive The BBA is a UKAS accredited certification body Number 113. The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at Readers are advised to check the validity and latest issue number of this Agrément Certificate by either referring to the BBA website or contacting the BBA direct. British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford mail@bba.star.co.uk Herts WD25 9BA 2009 website: Page 1 of 6

30 Regulations In the opinion of the BBA, Bigstop Waterstop, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations: The Building Regulations 2000 (as amended) (England and Wales) Requirement: C2(a) Requirement: Regulation 7 Resistance to moisture The product is an effective barrier to water in construction joints. See section 5 of this Certificate. Materials and workmanship The product is acceptable. See section 7 and the Installation part of this Certificate. The Building (Scotland) Regulations 2004 (as amended) Regulation: 8(1)(2) Fitness and durability of materials and workmanship The use of the product satisfies the requirements of this Regulation. See sections 6 and 7 and the Installation part of this Certificate. Regulation: 9 Building standards construction Standard: 3.4 Moisture from the ground The product is an effective barrier to water in construction joints, with reference to clauses (1)(2), (1)(2), (1)(2), (1)(2) and (1)(2) respectively. See section 5 of this Certificate. Regulation: 12 Building standards conversions All comments given for this product under Regulation 9, also apply to this Regulation, with reference to clause (1)(2) and Schedule 6 (1)(2). (1) Technical Handbook (Domestic). (2) Technical Handbook (Non-Domestic). The Building Regulations (Northern Ireland) 2000 (as amended) Regulation: B2 Fitness of materials and workmanship The product is acceptable. See section 7 and the Installation part of this Certificate. Regulation: B3(2) Suitability of certain materials The product does not normally require maintenance. See section 6 of this Certificate. Regulation: C4(b) Resistance to ground moisture and weather The product is an effective barrier to water in construction joints. See section 5 of this Certificate. Construction (Design and Management) Regulations 2007 Construction (Design and Management) Regulations (Northern Ireland) 2007 Information in this Certificate may assist the client, CDM co-ordinator, designer and contractors to address their obligation under these Regulations. See section: 2 Delivery and site handling (2.1). Non-regulatory Information NHBC Standards 2008 NHBC accepts the use of Bigstop Waterstop, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors. Zurich Building Guarantee Technical Manual 2007 In the opinion of the BBA, Bigstop Waterstop, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements. Page 2 of 6

31 Technical Specification 1 Description 1.1 Bigstop Waterstop is a heavy-duty, blue, extruded strip of sodium bentonite/butyl rubber with dimensions 30 mm by 40 mm, with one side backed by a silicone-treated paper. 1.2 Quality control is exercised over raw materials, during manufacture and on the final product. 2 Delivery and site handling 2.1 Coils of Bigstop Waterstop are packaged in cartons, each carton contains three coils of 3 m length (1), each box weighs 25 kg. (1) Weights and sizes are subject to change, users are advised to consult current manufacturer s literature. 2.2 The product must be stored away from direct heat, in dry conditions, under cover and away from the possibility of damage or premature contact with water. Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on Bigstop Waterstop. Design Considerations 3 Use 3.1 The product is satisfactory for use as a water bar: as part of a Volclay waterproofing installation, for Type A basement construction in grades 2, 3 and 4 as defined in Table 1 of BS 8102 : 1990, for construction joints in reinforced concrete structures, or for Type B structures as defined in BS 8102 to waterproof basements. 3.2 The product is used in heavily reinforced subterranean concrete constructions such as tunnels and other large civil engineering structures. 4 Practicability of installation 4.1 The system should only be installed by contractors who have been trained and approved by the Certificate holder. 4.2 Bigstop Waterstop should not be applied during heavy rainfall or where there is free-standing water. 5 Resistance to water pressure Both in its original condition and after hydration, Bigstop Waterstop will provide an effective barrier to liquid water in construction joints of reinforced concrete. 6 Maintenance As the product is confined by the concrete and has suitable durability (see section 7), maintenance is not required. 7 Durability When fully protected, Bigstop Waterstop, will provide an effective barrier to the transmission of liquid water in construction joints, for the life of the building in which it is incorporated. Page 3 of 6

32 Installation 8 General 8.1 Bigstop Waterstop should not be applied during heavy rainfall or where there is free-standing water. 8.2 The product is not designed for use in movement joints. 8.3 The product must never remain permanently exposed. 9 Procedure Surface preparation 9.1 Scabbling the joints is recommended. Joint surfaces should be clean, dry, free from cavities and spalling. Bigstop Waterstop can tolerate uneven concrete surfaces, but any major irregularities in the surface should be filled with cement grout or mortar. 9.2 Depending on the situation, Bigstop Waterstop is applied to: footings to wall joints on the inside of the outermost reinforcing bars but not in the keyway (see Figure 1) basement slab joints below the reinforcing bars (and attached to these if necessary) vertical wall joints from the base upwards normally inside the outermost reinforcing bars. Figure 1 Bigstop Waterstop installation details 9.3 Bigstop Waterstop is positioned near the outside face or in the centre of the reinforced concrete construction joint, ensuring that a minimum of 150 mm concrete cover is provided to all sides of the product. Installation 9.4 A strip of Bigstop Waterstop is uncoiled and placed in position leaving the release paper temporarily intact so it can be pushed firmly in place in to any undulations in the concrete surface (see Figure 1). Once sufficient product is positioned, the release paper is removed. 9.5 Continuity of consecutive strips is maintained by butt jointing. Page 4 of 6

33 9.6 To prevent movement during concrete placement, the strips of Bigstop Waterstop are covered by placing Revofix mesh over the product. The successive lengths of mesh are overlapped and fixed using nails at each overlap and at a spacing of approximately 300 mm in between. Swelling 9.7 If the material exhibits considerable swelling prior to confinement in the joint, it must be replaced with new material. Concrete casting 9.8 Casting of retaining walls and floor slabs is carried out immediately after fixing Bigstop Waterstop in position. Technical Investigations 10 Tests Data from the following tests were examined: characterisation resistance to hydrostatic pressure. 11 Investigations 11.1 Details were obtained of the manufacturing process, including the methods adopted for quality control Existing data on the effectiveness and durability of natural (Wyoming) sodium bentonite were examined Visits were made to a site in progress to assess the practicability of use and in particular the ease of installation around obstructions An assessment was made of the original data resulting in the issue of Certificate 83/1081. Bibliography BS 8102 : 1990 Code of practice for protection of structures against water from the ground Page 5 of 6

34 Conditions of Certification 12 Conditions 12.1 This Certificate: relates only to the product/system that is named and described on the front page is granted only to the company, firm or person named on the front page no other company, firm or person may hold or claim any entitlement to this Certificate is valid only within the UK has to be read, considered and used as a whole document it may be misleading and will be incomplete to be selective is copyright of the BBA is subject to English law Publications and documents referred to in this Certificate are those that the BBA deems to be relevant at the date of issue or re-issue of this Certificate and include any: Act of Parliament; Statutory Instrument; Directive; Regulation; British, European or International Standard; Code of Practice; manufacturers instructions; or any other publication or document similar or related to the aforementioned This Certificate will remain valid for an unlimited period provided that the product/system and the manufacture and/or fabrication including all related and relevant processes thereof: are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine are reviewed by the BBA as and when it considers appropriate In granting this Certificate, the BBA is not responsible for: the presence or absence of any patent, intellectual property or similar rights subsisting in the product/system or any other product/system the right of the Certificate holder to manufacture, supply, install, maintain or market the product/system individual installations of the product/system, including the nature, design, methods and workmanship of or related to the installation the actual works in which the product/system is installed, used and maintained, including the nature, design, methods and workmanship of such works Any information relating to the manufacture, supply, installation, use and maintenance of this product/system which is contained or referred to in this Certificate is the minimum required to be met when the product/system is manufactured, supplied, installed, used and maintained. It does not purport in any way to restate the requirements of the Health & Safety at Work etc Act 1974, or of any other statutory, common law or other duty which may exist at the date of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care. In granting this Certificate, the BBA does not accept responsibility to any person or body for any loss or damage, including personal injury, arising as a direct or indirect result of the manufacture, supply, installation, use and maintenance of this product/system. British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford mail@bba.star.co.uk Herts WD25 9BA 2009 website: Page 6 of 6

35 CETCO Europe Ltd Birch House Scotts Quays Birkenhead Merseyside CH41 1FB Tel: Fax: website: APPROVAL INSPECTION TESTING CERTIFICATION TECHNICAL APPROVALS FOR CONSTRUCTION Agrément Certificate 86/1650 Product Sheet 6 VOLCLAY WATERPROOFING SYSTEM FOR STRUCTURES COMBISEAL-T PRODUCT SCOPE AND SUMMARY OF CERTIFICATE This Certificate relates to CombiSeal-T, for use in waterproofing and damp-proofing underground reinforced concrete structures. AGRÉMENT CERTIFICATION INCLUDES: factors relating to compliance with Building Regulations where applicable factors relating to additional non-regulatory information where applicable independently verified technical specification assessment criteria and technical investigations design considerations installation guidance regular surveillance of production formal three-yearly review. KEY FACTORS ASSESSED Resistance to water and water vapour the system provides an effective barrier to the passage of liquid water and water vapour from the ground (see section 5). Resistance to puncturing the membrane is resistant to damage and has the ability to self-heal if punctured (see section 6). Durability when fully protected, the system provides an effective barrier to the transmission of water and water vapour for the life of the building in which it is incorporated (see section 11). The BBA has awarded this Agrément Certificate to the company named above for the system described herein. The system has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate. On behalf of the British Board of Agrément Date of First issue: 17 August 2009 Simon Wroe Greg Cooper Originally certificated on 2 August 2004 Head of Approvals Materials Chief Executive The BBA is a UKAS accredited certification body Number 113. The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at Readers are advised to check the validity and latest issue number of this Agrément Certificate by either referring to the BBA website or contacting the BBA direct. British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford mail@bba.star.co.uk Herts WD25 9BA 2009 website: Page 1 of 8

36 Regulations In the opinion of the BBA, CombiSeal-T, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations: The Building Regulations 2000 (as amended) (England and Wales) Requirement: A1 Requirement: C2(a) Requirement: Regulation 7 Loading When adequately confined, the system contributes to satisfying this Requirement. See section 8 of this Certificate. Resistance to moisture The system is an effective barrier to water and water vapour. See section 5 of this Certificate. Materials and workmanship The system is acceptable. See section 11 and the Installation part of this Certificate. The Building (Scotland) Regulations 2004 (as amended) Regulation: 8(1)(2) Fitness and durability of materials and workmanship The use of the system satisfies the requirements of this Regulation. See sections 10 and 11 and the Installation part of this Certificate. Regulation: 9 Building standards construction Standard: 1.1(a)(b) Structure The application of the system will not adversely affect the building s ability to transmit loadings, with reference to clauses (1)(2), (1)(2), (1)(2) and (1)(2). See section 8 of this Certificate. Standard: 3.4 Moisture from the ground The system is an effective barrier to liquid water and water vapour, with reference to clauses (1)(2), (1)(2), (1)(2), (1)(2) and (1)(2) respectively. See section 5 of this Certificate. Regulation: 12 Building standards conversions All comments given for this system under Regulation 9, also apply to this Regulation, with reference to clause (1)(2) and Schedule 6 (1)(2). (1) Technical Handbook (Domestic). (2) Technical Handbook (Non-Domestic). The Building Regulations (Northern Ireland) 2000 (as amended) Regulation: B2 Fitness of materials and workmanship The system is acceptable. See section 11 and the Installation part of this Certificate. Regulation: B3(2) Suitability of certain materials The system does not normally require maintenance. See section 10 of this Certificate. Regulation: C4(b) Resistance to ground moisture and weather The system is an effective barrier to liquid water and water vapour. See section 5 of this Certificate. Regulation: D1 Stability When adequately confined, the system contributes to satisfying this Requirement. See section 8 of this Certificate. Construction (Design and Management) Regulations 2007 Construction (Design and Management) Regulations (Northern Ireland) 2007 Information in this Certificate may assist the client, CDM co-ordinator, designer and contractors to address their obligation under these Regulations. See sections: 2 Delivery and site handling (2.1 to 2.4) and 4 Practicability of installation (4.3). Non-regulatory Information NHBC Standards 2008 NHBC accepts the use of CombiSeal-T, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 5.1 Substructure and ground bearing floors. Zurich Building Guarantee Technical Manual 2007 In the opinion of the BBA, CombiSeal-T, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section Basements. Page 2 of 8

37 Technical Specification 1 Description 1.1 CombiSeal-T is a waterproofing membrane, approximately 6.4 mm thick, consisting of two polypropylene geotextiles, a woven fabric and non-woven fabric, enclosing granular sodium bentonite at a minimum weight of 4.88 kgm 2. The two geotextiles are interlocked by a needle-punching process pushing fibres from the non-woven layer through and beyond the woven layer. This process links the geotextiles and contains and confines the bentonite, an HDPE liner is integrally bonded to the non-woven geotextile, (see Figure 1). Figure 1 Cross-section through CombiSeal-T woven geotextile needle-punched geotextile fibres non-woven geotextile HDPE liner granular Volclay sodium bentonite 1.2 CombiSeal-T is manufactured in a controlled continuous process. Quality control tests are carried out on the separate components of the system, and on the finished membrane. 1.3 Other components used with CombiSeal-T include: Waterstop RX a black, extruded strip of sodium bentonite/butyl rubber backed with a silicone release paper and used as a water bar in construction joints and in conjunction with CombiSeal-T Bentoseal a trowel-grade sodium bentonite compound used for detailing work, eg around penetrations Voltex Granules a loose form of granular sodium bentonite used to prevent the seepage of water from backfill material or mixed with water and used as a paste for sealing. 1.4 Quality control is exercised over raw materials, during manufacture and on the final products. 2 Delivery and site handling 2.1 CombiSeal-T is supplied in 1.1 m wide by 5.0 m long rolls on pallets of 35 rolls, stacked horizontally and shrinkwrapped. Each roll weighs between 35 kg to 40 kg (1). 2.2 Coils of Waterstop RX, 25 mm by 19 mm are packaged in cartons. Each carton contains six coils of 5 m length (1), each box weighs 25 kg. 2.3 Bentoseal is supplied in litre tubs (1), each tub weighs 18 kg. 2.4 Voltex Granules are supplied in 20 kg bags. 2.5 The product and components must be stored in dry conditions, under cover and away from the possibility of damage or premature contact with water. Waterstop RX should also be stored away from direct heat. (1) Weights and sizes are subject to change, users are advised to consult current manufacturer s literature. Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on CombiSeal-T. Page 3 of 8

38 Design Considerations 3 Use 3.1 CombiSeal-T is satisfactory for use in waterproofing and damp-proofing underground reinforced concrete structures and is satisfactory for Type A reinforced concrete basement construction grades 2, 3 and 4 as defined in Table 1 of BS 8102 : The membrane stops the passage of water between the membrane and the concrete structure to which it is fixed. The membrane must be adequately confined to ensure a watertight seal is achieved in service. 3.3 Waterstop RX is satisfactory for use as a water bar in reinforced concrete construction joints, on Type B constructions as defined in Table 1 of BS 8102 : It is also used as an accessory in structures waterproofed with CombiSeal-T. 3.4 Waterstop RX is not designed for use in movement joints. 3.5 The product and components must never remain permanently exposed. 4 Practicability of installation 4.1 The system should only be installed by contractors who have been trained and approved by the Certificate holder. 4.2 The membrane is easy to handle and can be cut using a sharp knife. 4.3 CombiSeal-T may be applied under most normal site conditions, including subzero temperatures and during heavy rainfall. Under wet conditions the system can withstand light construction traffic without significant extrusion of the bentonite. Slight losses at the exposed edges of a lap joint will not impair the watertightness, provided the conditions given in section 12.3 are met. Any bentonite that extrudes from the membrane will become slippery when wet which can have an adverse effect on site safety. 4.4 Waterstop RX should not be applied during heavy rainfall or where there is free-standing water. 5 Resistance to water and water vapour The system provides an effective barrier to the passage of liquid water and water vapour from the ground. 6 Resistance to puncturing The system is robust and resistant to normal site activities. The dropping of heavy articles will normally have no damaging effect on the membrane. Any accidental cuts will self heal when the membrane is hydrated following correct installation, provided that bentonite material is not lost from the edges of the cut. If it is thought that bentonite material has been lost, a patch of CombiSeal-T is applied, and secured by nailing over the damaged area, ensuring that the patch extends a minimum of 100 mm each side of the damaged area. If the damage is more extensive, the membrane should be replaced with fresh CombiSeal-T. 7 Chemical resistance 7.1 The gelling of sodium bentonite is adversely affected by the presence of electrolytes (particularly trivalent ions) and may also be affected by the presence of soluble cations such as those found in chalk or lime soils. In such cases advice should be sought from the Certificate holder. 7.2 The membrane is not affected by organic contaminants. 7.3 In chemically-contaminated areas the membrane is hydrated by deliberate soaking with mains water and leaving for two to three hours before placing the backfill or pouring the concrete. 8 Resistance to loading Provided the membrane is adequately confined, properly hydrated and not subject to point loading, an installation beneath a foundation slab will transmit dead and imposed loads to the ground safely and without excessive deformation. In situations where point loading is anticipated the Certificate holder s advice should be sought. 9 Adhesion When concrete is cast against the membrane the free ends of the needle-punched fibres become embedded in the concrete, creating a permanent bond between the concrete and membrane. 10 Maintenance As the system is confined by the concrete and has suitable durability (see section 11), maintenance is not required. Page 4 of 8

39 11 Durability A fully-protected CombiSeal-T membrane, when installed with the appropriate ancillary products, will provide an effective barrier to water and water vapour for the life of the building in which it is incorporated. Installation 12 General 12.1 CombiSeal-T is installed with the woven geotextile in contact with the concrete surface to be waterproofed The system bonds to poured concrete to form an integral seal to prevent water migration and requires no priming, fillets or protection boards The formation of a continuous waterproof barrier is achieved using lap joints with a minimum overlap of 100 mm between adjoining edges and 300 mm between roll ends. It is recommended to stagger laps at a minimum of 300 mm to avoid four sheets overlapping in one location. All lap joints are secured by either stapling laps together, or fixing them to the base with fasteners Sealing around protrusions through the membrane, eg at such details as piles and service pipes, is accomplished by cutting a hole in the membrane and fitting over the protrusion, bedding the membrane onto either Bentoseal or a paste made up, in situ, by mixing Voltex Granules with water. 13 Procedure CombiSeal-T Vertical surfaces 13.1 CombiSeal-T can be installed either against the outside of existing walls, or preferably applied to the inside face of shuttering to be subsequently filled with poured concrete On cast concrete substrates, the product is aligned horizontally (although vertical alignment is possible) and fixed through the overlaps using proprietary washer-headed fasteners. When fixed to the inside face of shuttering, the product is aligned vertically (although horizontal alignment is possible) ensuring that all laps face down, away from the flow of the poured concrete. The overlaps are secured to the shuttering using nails or staples. A minimum overlap of 100 mm should be achieved between the vertical membrane and the membrane protruding from the base slab Backfilling should be carried out as soon as possible after placing the CombiSeal-T. Backfill material should be free from builders debris and angular aggregate, and should be compacted to a minimum 85% Modified Proctor After backfilling, the application of the membrane is continued. The membrane should not be installed above the intended final ground level and CombiSeal-T is terminated on the concrete structure at ground level. Horizontal surfaces 13.5 Surfaces to be waterproofed should be reasonably smooth and may be damp (but free from standing water). Earth and sand substrates should be compacted to a minimum 85% Modified Proctor At the edge of the slab the membrane should extend vertically a minimum of 300 mm above the top surface to form an overlap with the vertical membrane Overlaps should be stapled or nailed to prevent displacement during concrete placement The concrete slab to be poured should have a minimum thickness of 150 mm. Waterstop RX Surface preparation 13.9 Joint surfaces should be clean, dry and free from cavities and spalling. Any irregularities in the surface do not normally need to be filled. If required, these can be filled with a suitable strength cement grout or mortar while the concrete is still green, and made smooth Waterstop RX is positioned in the centre of the reinforced concrete construction joint, ensuring that a minimum of 75 mm concrete cover is provided to all sides of the product. Installation A strip of Waterstop RX is uncoiled and placed in position leaving the release paper temporarily intact so it can be pushed firmly in place into any undulations in the concrete surface (see Figure 2). Once sufficient product is positioned, the release paper is removed. Page 5 of 8

40 Figure 2 Waterstop RX installation details vertical wall joint Waterstop RX footing to wall joint kicker cast integrally with footing Waterstop RX Continuity of consecutive strips is maintained by butt jointing To prevent movement during concrete placement, the strips of Waterstop RX are covered by placing Revofix mesh over the product. The successive lengths of mesh are overlapped and fixed using nails at each overlap and at a spacing of approximately 300 mm in between. Swelling If the material exhibits considerable swelling prior to confinement in the joint, it must be replaced with new material. Concrete casting Casting of retaining walls and floor slabs is carried out immediately after fixing Waterstop RX in position. Technical Investigations 14 Tests Tests were conducted to determine: resistance of lap joints to water penetration resistance to puncture damage weight per unit area of bentonite. resistance to rainfall (natural exposure) weight per unit area of the membrane 15 Investigations 15.1 The manufacturing process was examined, and the raw material specifications and quality control procedures established An assessment was made of existing data relating to the performance of the bentonite geotextile An assessment was made of the original data resulting in the issue of Certificate 83/1081. hydraulic conductivity under water pressure low-temperature flexibility resistance to hydrostatic pressure mechanical properties of the geotextiles water vapour transmission through hydrated membrane An assessment was made of the original data resulting in the issue of Certificate 83/1081. Bibliography BS 8102 : 1990 Code of practice for protection of structures against water from the ground Page 6 of 8

41 Conditions of Certification 16 Conditions 16.1 This Certificate: relates only to the product/system that is named and described on the front page is granted only to the company, firm or person named on the front page no other company, firm or person may hold or claim any entitlement to this Certificate is valid only within the UK has to be read, considered and used as a whole document it may be misleading and will be incomplete to be selective is copyright of the BBA is subject to English law Publications and documents referred to in this Certificate are those that the BBA deems to be relevant at the date of issue or re-issue of this Certificate and include any: Act of Parliament; Statutory Instrument; Directive; Regulation; British, European or International Standard; Code of Practice; manufacturers instructions; or any other publication or document similar or related to the aforementioned This Certificate will remain valid for an unlimited period provided that the product/system and the manufacture and/or fabrication including all related and relevant processes thereof: are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine are reviewed by the BBA as and when it considers appropriate In granting this Certificate, the BBA is not responsible for: the presence or absence of any patent, intellectual property or similar rights subsisting in the product/system or any other product/system the right of the Certificate holder to manufacture, supply, install, maintain or market the product/system individual installations of the product/system, including the nature, design, methods and workmanship of or related to the installation the actual works in which the product/system is installed, used and maintained, including the nature, design, methods and workmanship of such works Any information relating to the manufacture, supply, installation, use and maintenance of this product/system which is contained or referred to in this Certificate is the minimum required to be met when the product/system is manufactured, supplied, installed, used and maintained. It does not purport in any way to restate the requirements of the Health & Safety at Work etc Act 1974, or of any other statutory, common law or other duty which may exist at the date of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care. In granting this Certificate, the BBA does not accept responsibility to any person or body for any loss or damage, including personal injury, arising as a direct or indirect result of the manufacture, supply, installation, use and maintenance of this product/system. Page 7 of 8

42 British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford Herts WD25 9BA 2009 website: Page 8 of 8

43 CETCO Europe Ltd Birch House Scotts Quays Birkenhead Merseyside CH41 1FB Tel: Fax: website: APPROVAL INSPECTION TESTING CERTIFICATION TECHNICAL APPROVALS FOR CONSTRUCTION Agrément Certificate 86/1650 Product Sheet 7 VOLCLAY WATERPROOFING SYSTEM FOR STRUCTURES VOLCLAY TYPE 1 PANEL PRODUCT SCOPE AND SUMMARY OF CERTIFICATE This Certificate relates to Volclay Type 1 Panel, for use in waterproofing and damp-proofing underground reinforced concrete structures. AGRÉMENT CERTIFICATION INCLUDES: factors relating to compliance with Building Regulations where applicable factors relating to additional non-regulatory information where applicable independently verified technical specification assessment criteria and technical investigations design considerations installation guidance regular surveillance of production formal three-yearly review. KEY FACTORS ASSESSED Resistance to water and water vapour the system provides an effective barrier to the passage of liquid water and water vapour from the ground (see section 5). Resistance to puncturing the panel has the ability to self-heal if punctured (see section 6). Durability when fully protected, the system provides an effective barrier to the transmission of water and water vapour for the life of the building in which it is incorporated (see section 11). The BBA has awarded this Agrément Certificate to the company named above for the system described herein. The system has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate. On behalf of the British Board of Agrément Date of First issue: 17 August 2009 Simon Wroe Greg Cooper Originally certificated on 2 September 1986 Head of Approvals Materials Chief Executive The BBA is a UKAS accredited certification body Number 113. The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at Readers are advised to check the validity and latest issue number of this Agrément Certificate by either referring to the BBA website or contacting the BBA direct. British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford mail@bba.star.co.uk Herts WD25 9BA 2009 website: Page 1 of 8