Incorporating: SG H92-Dryvit/120A. Dryvit UK Ltd. Ref: DUK 636 ISO 9001 Certified

Transcription

1 NBS model specification H92 rainscreen cladding: insulation with rendered finish Dryvit Infinty Incorporating: SG H92-Dryvit/120A Wall System Dryvit UK Ltd. Ref: DUK 636

2 DRYVIT INFINITY WALL SYSTEM PRODUCT DESCRIPTION Dryvit UK Ltd. Unit 4 Wren Park Hitchin Road Shefford Bedfordshire SG17 5JD Tel: Fax: ukenquiries@dryvit.com web: Dryvit pressure equalised rainscreen system engineered to prevent water infiltration caused by wind pressure differentials. An exterior insulation and finish system (EIFS) consisting of a moisture barrier, cavity formed by a patented EPS insulation and an outer lamina layer of base coat, mesh and finish. This system also benefits from the design versatility associated with all Dryvit EIFS. SCOPE This specification is based on NBS standard version H92 dated March 2000 and is intended to be used with the standard or intermediate version of this section to produce project specifications. For guidance on the specification of other Dryvit products see specification guides: H20 Rigid Sheet Cladding SG H20-Dryvit/150, Dens -Glass Gold M20 - External Insulation and Finish Systems SG M20-Dryvit/160A, Dryvit ACR 300 TM SG M20-Dryvit/160B, Dryvit ACR 200 TM SG M20-Dryvit/160C, Dryvit ACR 150 TM SG M20-Dryvit/160D, Dryvit ACR 100 TM SG M20-Dryvit/160E, Dryvit ACR 50 TM M21 Acrylic Based Anti-Crack Render Systems SG M21-Dryvit/210A, Outsulation Plus System SG M21-Dryvit/210B, Outsulation System SG M21-Dryvit/210C, Roxsulation System SG M21-Dryvit/210D Residential MD System SG M21-Dryvit/220A, Dryvit Rail System TM M60 - Acrylic-based finish coatings SG M60-Dryvit/110A, Dryvit Finish Coats Dryvit specification clauses are also available in NBS Plus to registered subscribers. H92/1 of 13

3 GUIDANCE ON USE INTRODUCTION Specification Guides These are produced by manufactures to facilitate the specification of their products in NBS. A license must be obtained from NBS Services prior to publication, which requires model specifications to be compatible with the correspondence NBS work section. Specification Guides contain a set of proprietary clauses -edited versions of generic NBS clauses, and new clauses written by the product manufacturer. To specify the product, some or all of these clauses are incorporated in the corresponding NBS work section. It is not possible to produce a project specification by using the clauses from the Specification Guide in isolation-generic clauses must also be used. An unlimited number of Specification Guides can be used to specify products in an NBS work section, e.g. Specification Guides by several manufactures could be used to specify rainscreen cladding in section H92. Specification Guides are based on the corresponding NBS Standard Version, but can generally be used in conjunction with the Standard or Intermediate Version. Reference numbers Each NBS specification guide is identified by a unique reference number, e.g. SG H92-Dryvit/120A (Specification Guide H92 Rainscreen System/ Dryvit/120A Infinity Wall System reference). Clause numbers Edited versions of NBS clauses are given a new clause number with a single character suffix, e.g. clause H92/120 might become H92/120A or H92/121A. Clauses written by the product manufacturer are allocated a new clause number - these also include a single character suffix, e.g. H92/120A. Model specifications index This is located in the first ring binder, and in the NBS for Windows and Specification Manager manuals. It comprises a Model Specifications Index which lists the model specifications available in each work section, and a List of Manufactures which lists the model specifications produced by each company. Specification Guides need to be revised when the manufacturer makes changes to the product of product range. They may also need to be revised following an update of the NBS work section on which they are based. Appropriate details will be provided in the Model Specifications Index, which should be checked to ensure a current Specification Guide is being used. The index is revised twice a year to coincide with NBS updates, but if in doubt about the status of a Specification Guide, check with the manufacturer using the telephone or fax numbers shown on the first page of this document. SPECIFICATION PRODUCTION Using a computer These instructions will be appropriate if you are producing a product specification on screen using Specification Manager or a word processing package - for the latter it is necessary to have access to NBS text files through membership of the NBS disc service or NBS for Windows. If you also have access to a text file containing the Specification Guide, copy and paste the clauses you require into the appropriate NBS text file(s). Otherwise, edit the text file(s) in accordance with the alterations shown in the Specifications Guide - the following conventions are used: Proprietary text is shown in bold italics. Irrelevant or inappropriate NBS text is shown struck out. The proprietary text added to the NBS computer file should be formatted in a plain font style, not in bold italics. The latter is only reproduced on paper copy f or the identification purposes explained above. Complete the specification in the normal manner, with the help of clause guidance from the NBS section and the Specification Guide. Ensure that clause numbers are not duplicated - especially where they have been incorporated from more than one Specification Guide. Using mark-up copy You need an NBS mark-up copy of the relevant work section (or a print out from your computer), and a photocopy of the Specification Guide to use as supplementary mark-up copy. Use these side by side and complete the specification in the usual manner, selecting NBS and Specification Guide clauses as appropriate. As work proceeds, record the selection of Specification Guide clauses in the margin of the NBS mark-up copy, e.g. Ins ert 150A [ refer to separate page] between NBS clauses 150 and 160. Ensure that clause numbers are not duplicated - especially where they have been incorporated from more than one Specification Guide. Inform the person who is going to word process the specification about the text formatting conventions described above (see Specification production using a computer ). They should also understand that mark-up copy which includes a company name or logo in the header originates from a Specification Guide - the clauses on these pages will not be found in the NBS text file and will need to be copied across or keyed in as described above. The specification is completed in the normal manner by editing the NBS text file in accordance with the hand-written notes on the mark-up copy. H92/2 of 13

4 GUIDANCE NOTES MODEL SPECIFICATION CLAUSES H92 DRYVIT RAINSCREEN SYSTEM To be read with Preliminaries/General conditions. TYPE(S) OF RAINSCREEN CLADDING Dryvit UK Ltd, Unit 4 Wren Park, Hitchin Road, Shefford, Beds. SG17 5JD Telephone: ; Facsimile: ukenquiries@dryvit.com Dryvit has been part of the External Insulation and Finish Systems (EIFS) industry for over 30 years with a world-wide portfolio of projects of various sizes. An RPM Company with ISO All Dryvit EIFS offer unlimited design freedom with high performance properties. The Dryvit range of systems are specified to meet all the functional and aesthetic needs of a building s external envelope, allowing the designer to select from a large variety of textured finishes and colours. We suggest the designer contact Dryvit in the first instance to discuss specific needs, so that the appropriate EIFS can be recommended. You can contact us directly by telephone, fax, and also visit our web site as detailed above. Dryvit External Wall Insulation and Finish Systems (EIFS) are available for a variety of applications suitable for commercial and residential projects. The Dryvit EIFS holds BBA Agrément Certificate No. 98/3548. A. Commercial Systems are suitable for projects including institutional, offices, healthcare, retail, hotel, industrial, public buildings and multi-storeyed residential buildings etc. for options of on-site or prefabricated panelled applications, of any size. 1. Dryvit Infinity System: A pressure -equalised and moisture drained engineered rainscreen EIFS with thermal properties. It incorporates grade SD type FRA expanded polystyrene (EPS) insulation for thermal performance. (See Clause H92/120A). Other non-rainscreen (EIFS) systems are as below: See Work Section M21 1. Dryvit Outsulation Plus System: A highperformance EIFS with moisture drainage incorporating an Air & Moisture Protective Barrier and grade SD type FRA expanded polystyrene (EPS) insulation for thermal performance. (See Section M21.210A). 2. Dryvit Outsulation System: A polymer-based barrier EIFS incorporating grade SD type FRA expanded polystyrene (EPS) insulation for thermal rating. Agrément Certificate No. H92/3 of 13

5 thermal rating. Agrément Certificate No. 98/3548 Detail Sheet 2. (See Section M21.210B). 3. Dryvit Roxsulation System: A polymer-based barrier EIFS incorporating mineral wool (slab or lamella) insulation for thermal rating. Agrément Certificate No. 98/3548 Detail Sheet 3. (See Section M21.210C). 4. Dryvit Rail System TM : A mechanically fastened rail EIFS to be used over walls with damaged or brittle substrates or irregular surfaces on retrofit or new build construction. It incorporates grade SD type FRA expanded polystyrene (EPS) insulation for thermal performance. (See Section M21.210D). B. Residential Systems are suitable for residential projects for on-site or pre-fabricated applications. They are: 1. Dryvit Residential MD System : A residential EIFS with moisture drainage, incorporating grade SD type FRA expanded polystyrene (EPS) insulation for thermal performance. The system has a specially designed fibrous mat - that is installed between the secondary weather barrier and the insulation board - to create a drainage plane. The system is mechanically fastened over a weather barrier to plywood. This system can also be applied in commercial use, contact Dryvit for advice. (See Section M21.210E). 2. Dryvit Outsulation System: A polymer-based barrier EIFS incorporating grade SD type FRA expanded polystyrene (EPS) insulation for thermal rating. Agrément Certificate No. 98/3548 Detail Sheet 2. (See Section M21.210B). 3. Dryvit Roxsulation System: A polymer-based barrier EIFS incorporating mineral wool (slab or lamella) insulation for thermal rating. Agrément Certificate No. 98/3548 Detail Sheet 3. (See Section M21.210C). 120A RAINSCREEN CLADDING: (SG/H92-Dryvit/120A) - Location: [ Insert, e.g. External walls, from First to Tenth Floor Levels, facing south and east/all elevations (as applicable) ]. - Drawing reference(s): [ insert, e.g. Drawing numbers or See Drawing Schedule ]. - Primary support structure: [ Insert details of fabric/structure to which the EIFS system will be fixed, e.g. reinforced concrete structure, masonry structural/lightweight steel frame. If a lightweight steel frame is used then we would expect a sheathing board to be applied as the substrate to which the rainscreen system would be fixed. For Dryvit sheathing board see Work Section H20/150A. The primary support structure may be by others or by this Works Contractor, and should comply with the requirements of BS 6399:Part 1 and BS A RAINSCREEN CLADDING: - Location: [ ]. - Drawing reference(s): [ ]. - Primary support structure: [ e.g. Lightweight metal stud framework by others, to receive sheathing board (see also Work Section H20/150A) to Dryvit approval ]. - Rainscreen Cladding System: Pressure equalised. - Manufacturer: Dryvit UK Ltd., Unit 4 Wren park, Hitchin Road, Shefford, Beds. SG17 5JD Telephone: ; Facsimile: ; ukenquiries@dryvit.com ]. - System reference: Dryvit Infinity Wall System. [ General Dryvit EIFS Agrément Certificate No.:98/3548 Detail Sheet 1 ] - Material: General build up consists of : H92/4 of 13

6 requirements of BS 6399:Part 1 and BS Please note that a secondary support structure is not required for the Infinity system ]. - Rainscreen Cladding System: [ Pressure equalised ]. Unlike traditional rainscreen systems the infinity system does not require a continuous air gap between the primary structure and the system. Pressure equalisation is achieved be venting and compartmentalisation of the insulation boards to meet the Engineer/Architect requirements. - Manufacturer: Dryvit UK Ltd, Unit 4 Wren Park, Hitchin Road, Shefford, Beds. SG17 5JD Telephone: ; Facsimile: ; ukenquiries@dryvit.com] - System reference: [ Dryvit Infinity Wall System ]. - Material: Typical system build up: 1. Substrate (structural framing). 2. Sheathing (See Work Section H20/150A). 3. Dryshield ABA air barrier and adhesive. 4. Dryvit Grid Tape 5. I.S Insulation Board (EPS) 6. I.S Insulation Closure Board (EPS) 7. Dryvit Vent Assembly 8. Dryvit Track & Vent Track 9. I.S Base Coat, with embedded I.S Reinforcing Mesh 10. Infinitex or speciality finish coat (with sealants if required). - Thickness: [ ]mm. Refer to thermal insulation requirements below. - Finish/Colour:[ A. Colour: See Dryvit standard colour range or as instructed by the CA. Consult Dryvit Uk for colour samples. B. Texture: See relevant finish textures outlined below or customised finish agreed with the CA in relation to sample panel ]. Dryvit Infinitex or speciality finishes are available in a standard colour range and can alternatively be providing protective and decorative properties to suit. The finishes offer low maintenance advantages with DPR TM (Dirt Pickup Resistance) and PMR TM (Proven Mildew Resistance) technology. The various texture and finish types are: 1. Infinitex elastomeric 100% acrylic finish with quartz aggregate, mildew and dirt resistant technology. Colorprime primer. a. Infinitex QP coarse texture. b. Infinitex SP rough pebble texture. c. Infinitex SPF fine pebble-like texture. d. Infinitex ADB : smooth texture. 2. Standard Coatings: a. Demandit (Weathercoat TM Smooth) b. Revyvit (Weathercoat Textured) 3. Speciality Finishes: a. Ameristone b. Stone Mist c. Metallics d. Custom Brick /Stone e. Interior Finishes 1. Dryshield ABA air barrier on substrate. 2. I.S Insulation adhesively fixed with Dryshield ABA to substrate. 3. I.S Base Coat & Mesh 4. Infinitex or speciality finish as detailed below - Thickness: [ ]mm - Finish/colour: [ Infinitex or Speciality finish A. Colour: From standard range or customised. B. Texture: Selected finish type ]. - Other System requirements: All the necessary ancillary products required to achieve pressure equalisation must be allowed for as per Engineer/Architect requi rements and applied in accordance with Dryvit UK Ltd. current recommendations. Detail mesh should be used to back wrap the system at all termination details of the system. Dryvit starter track is recommended at ground floor. Please also refer to clauses H92: 320A, 330A, 350A, 381A, 910A. - Fixing system: [ Dryshield ABA adhesive ]. - Joint type: See Clause H92:380A & 770A. - Joint width: [ Terminations 19mm wide between Infinity system and adjoining materials. mm at expansion joints ]. - Backing wall: [ ]. - Breather membrane: Dryvit Dryshield ABA. - Thermal insulation: [ W/m 2 K. Relative to the thickness of the Infinity System detailed above and including the make up of the primary support structure ]. - Accessories: [ 1. All metal work by others including coping at parapet, flashing at base etc. 2. As indicated on the Design Drawings ]. - Attachments: [ e.g. 1. Feature bands around window openings including arc and pier moulding. 2. Projecting plinth at base of EIFS system. 3. External corner quoins ]. - Incorporated components: [ ]. - Other requirements: [ ]. - Co-ordination: [ the work with interfacing building elements 1. Metal coping by others. 2. Windows by others. 3. Doors by others. 4. Roof flashings by others. 5. Signage by others ]. H92/5 of 13

7 4. Customisation of finishes to the CA s requirement can be obtained. Contact Dryvit to discuss various possibilities prior to specifying non-standard options] - Other system requirements: All the necessary ancillary products required to achieve pressure equalisation must be allowed for as per engineer/architect requirements and applied in accordance with Dryvit UK Ltd. current recommendations. Detail mesh should be used to back wrap the system at all termination details of the system. Dryvit starter track is recommended at ground floor. Please also refer to clauses H92: 320A, 330A, 350A, 381A, 910A. - Fixing system: [ Dryshield ABA adhesive ]. The I.S Insulation boards are normally adhesively fixed. The only exception to this would be if mechanical fixings were required to secure the system to an existing substrate. - Joint type: See Clause H92:380A & 770A. - Joint width: [ 1.Terminations: system shall be held back from adjoining materials by minimum 19mm wide or as instructed by the Architect/CA with the approval of Dryvit UK Ltd. 2. Expansion joints in system width dependent on expected movement to Architect/CA requirements ]. - Air gap: Not applicable to the Infinity System as there is not a continuous air gap between the system and the primary support structure. Pressure equalisation is achieved by the vented compartmentalisation of the system as designed by the Engineer/Architect with assistance from Dryvit UK Ltd. Not included in clause. See H92:330A. - Secondary support/framing system: Not applicable with the Infinity system therefore not included in clause H92:120A. - Backing wall: [ Insert substrate type: refer to primary structure details above. i.e. sheathing board by Dryvit See also H20:150 ]. - Breather membrane: Dryvit Dryshield ABA - Thermal insulation: [ Insert overall wall performance i.e W/m 2 K. Relative to the thickness of the Infinity System detailed above and including the make up of the primary support structure ]. Determined by the thermal insulation value required. The I.S EPS insulation incorporated within the system will contribute to the performance of the wall and Dryvit UK Ltd. can be consulted to assist in this calculation. - Accessories: [ 1. All metal work by others including coping at parapet, flashing at base etc. 2. As indicated on the Design Drawings ]. - Attachments: Describe here any Dryvit architectural prefabricated standard and/or bespoke mouldings, feature/surround bands around windows/door/louvre openings e.g. arc, ledges, moulding, billet, pier, architrave, fillet or chamfer, plinth, quoins. - Incorporated components: Describe here any major standard items you wish to include in the Infinity system. e.g. if you are pre-fabricating panels this may describe window units that should be incorporated. H92/6 of 13

8 should be incorporated. - Other requirements: Use this item to draw attention to any unusual requirements. - Co-ordination: [ Co-ordinate the Work with interfacing building elements 1. Electrical fittings by others. 2. Mechanical Services by others. 3. Hydraulic Services by others. 4. Access equipment bracket penetrations by others. 5. Metal coping by others. 6. Windows by others. 7. Doors by others. 8. Roof flashings by others. 9. Roof eaves boards by others. 10. Signage by others ]. GENERAL REQUIREMENTS/ PREPARATORY WORK 225A INFORMATION TO BE PROVIDED WITH TENDER: With the tender, the contractor provides descriptive literature for each product, which he proposes to use. The CA uses this information to verify compliance with the specification. 225A INFORMATION TO BE PROVIDED WITH TENDER: [ Manufacturer s current product data describing products that will be used on this project ]. 230A INFORMATION TO BE PROVIDED AFTER ACCEPTANCE OF TENDER: For prefabricated panel construction, the panel fabricator will need to produce shop drawings indicating panel and framing member sizes, spacing, sheathing and attachment, panel to framing attachment, panel layout, and any other information requested by the CA. The CA will review and approve these drawings prior to panel fabrication commences. 230A INFORMATION TO BE PROVIDED AFTER ACCEPTANCE OF TENDER: [ For panellised construction, the panel fabricator to supply complete drawings showing wall layout, connections, details, expansion joints, and installation sequence for approval by the Architect/CA ]. 240A PRODUCT SAMPLES: Before commencing detailed design provide the CA with identified samples of: [ insert list of product samples and sizes following agreement with Dryvit. e.g. - The contractor to submit 2 samples of each finish, texture and colour to be used on the project. Samples to be of sufficient size to accurately represent each colour and texture being utilised on the project ]. Obtain approval of [ the product, finish, colour and] appearance before proceeding. - These samples are provided for approval of the product, finish and colour prior to proceeding. 270 MOCK-UP: At an agreed stage during detailed design work construct in an approved location a mock-up of: Purpose(s) of mock-up:. Arrange f or inspection to be carried out jointly with the CA. Obtain approval of appearance before proceeding. Retain mock-up in undisturbed condition until completion of rainscreen cladding installation. - The mock up is larger sized than samples and may be part of the actual work on the building. It is intended to provide a standard of quality for 240A PRODUCT SAMPLES: Before commencing detailed design provide the CA with identified samples of: - [ The contractor to submit 2 samples of each finish, texture and colour to be used on the project. Samples to be of sufficient size to accurately represent each colour and texture being utilised on the project ]. - Obtain approval of [ the product, finish, colour and ] appearance before proceeding. 270 MOCK-UP: At an agreed stage during detailed design work construct in an approved location a mock-up of: Purpose(s) of mock-up:. Arrange for inspection to be carried out jointly with the CA. Obtain approval of appearance before proceeding. Retain mock-up in undisturbed condition until completion of rainscreen cladding installation. - [ The Contractor to provide the CA a mock up for approval. The mock up to be of sufficient size to accurately represent each colour and texture to H92/7 of 13

9 It is intended to provide a standard of quality for the work and may includes other wall components such as windows, doors, features, etc. to indicated method of treatment. accurately represent each colour and texture to be utilised on the project. The mock up to be prepared with the same products, tools, equipment and techniques required for the actual applications. The approved mock up to be available and maintained at the jobsite or at an agreed location as instructed by the CA ]. DESIGN/PERFORMANCE REQUIREMENTS 310A GENERALLY: - The tests to be carried out in order to verify the system s performance in accordance with recognised and equivalent national or international test standards. - The purpose of the tests will be to verify air leakage, pressure equalisation and durability performance of the products. 311 DURABILITY TEST: - The following tests to be carried out in order to verify the system s performance in accordance with recognised test standards. Tests will verify air leakage, pressure equalisation and durability performance of the products. - The Dryvit Infinity rainscreen system to have been tested for durability as follows: a. Air Leakage: ASTM E283; less than 0.3 l/min/m 2. b. Dynamic Pressure Equalisation: National Research Council of 750 Pa, K=.99, φ=3.7. c. Water Penetration: ASTM E331; no water penetration. d. Water Resistance: ASTM D2247; passed. e. Moisture Drainage Efficiency: ASTM E331 (Modified); Minimum 95% Efficiency. f. Absorption/Freeze/Thaw: ASTM C67; 60 cycles. g. Absorption/Freeze/Thaw: ICBO Procedure; 10 cycles. h. Accelerated Weathering: ASTM G23; 2000 hrs ]. 312 STRUCTURAL PERFORMANCE TEST: Structural performance testing in accordance with recognised test standards to verify performance regarding wind load resistance, impact resistance and tensile bond tests to the specified substrate. - The Dryvit Infinity rainscreen system have been tested, passed to comply for structural performance as follows: a. Transverse Load Test: ASTM E330; negative 4.8 kpa minimum. b. Impact Resistance: EIMA ; I. S. Reinforcing Mesh, 3-6 J; Panzer 20 Mesh and I. S. Reinforcing Mesh, >39 J. c. Tensile Bond: ASTM C297; passed. d. Tensile Bond: ICBO Procedure; passed. 313 FIRE PERFORMANCE TEST: - Test to be performed to verify the system s fire performance in accordance with standard test methods. - The Infinity System to have been tested for fire performance as follows: 310A GENERALLY: - [ The tests to be carried out in order to verify the system s performance in accordance with recognised and equivalent national or international test standards. - The purpose of the tests will be to verify air leakage, pressure equalisation and durability performance of the products ]. 311 [ DURABILITY TEST: The rainscreen system to have been tested for durability as follows: a. Air Leakage: ASTM E283; less than 0.3 l/min/m 2. b. Dynamic Pressure Equalisation: National Research Council of 750 Pa, K=.99, f=3.7. c. Water Penetration: ASTM E331; no water penetration. d. Water Resistance: ASTM D2247. e. Moisture Drainage Efficiency: ASTM E331 (Modified); Minimum 95% Efficiency. f. Absorption/Freeze/Thaw: ASTM C67; 60 cycles. g. Absorption/Freeze/Thaw: ICBO Procedure; 10 cycles. h. Accelerated Weathering: ASTM G23; 2000 hrs ]. 312 [ STRUCTURAL PERFORMANCE TEST: The Infinity rainscreen system to have been tested for structural performance as follows: a. Transverse Load Test: ASTM E330; negative 4.8 kpa minimum. b. Impact Resistance: EIMA ; I. S. Reinforcing Mesh, 3-6 J ; Panzer 20 Mesh and I. S. Reinforcing Mesh, >39 J c. Tensile Bond: ASTM C297. d. Tensile Bond: ICBO Procedure ]. 313 [ FIRE PERFORMANCE TEST: - Test to be performed to verify the system s fire performance in accordance with standard test methods. - The Infinity System to have been tested for fire performance as follows: H92/8 of 13

10 a. Multi Story Test: UBC 26-9 ISMA Multi Story Fire Test. b. Full Scale Test: ASTM E108 (Modified). c. Rated Wall Test: ASTM E119 (one-hour). d. BOCA Radiant Heat Ignitability Test. e. Flame Spread - Insulation Board: ASTM E84; Flame Spread <25, Smoke Developed <450. f. Flame Spread - Infinitex Finish: ASTM E84; Flame Spread 10, Smoke Devel oped 5. g. Flame Spread - Dryshield ABA: ASTM E84; Flame Spread 5, Smoke Developed 0. h. Flame Spread - I. S. Base: STM E84; Flame Spread 3, Smoke Developed 0. i. Flame Spread - Stone Mist: ASTM E84; Flame Spread 10, Smoke Developed A HORIZONTAL ZONING OF WIND PRESSURE: Reference heights are as follows: [ Insert e.g. See the Design Drawings or at maximum 9.1m measured vertically ]. - Each wall façade to be separated into zones of approximate equal wind pressure - Each area will be separated form adjacent areas using closure blocks to prevent differential pressure from travelling to adjacent compartments. ASCE 7-95 provides guidelines for locating wind zones on a building façade and can be used as a basis for design. Wind tunnel test results also are acceptable. The maximum compartment heights are based on rational method to minimise delay in pressure equalisation of the cavity. a. Multi Story Test: UBC 26-9 ISMA Multi Story Fire Test. b. Full Scale Test: ASTM E108 (Modified). c. Rated Wall Test: ASTM E119 (onehour). d. BOCA Radiant Heat Ignitability Test. e. Flame Spread - Insulation Board: ASTM E84; Flame Spread <25, Smoke Developed <450. f. Flame Spread - Infinitex Finish: ASTM E84; Flame Spread 10, Smoke Developed 5. g. Flame Spread - Dryshield ABA: ASTM E84; Flame Spread 5, Smoke Developed 0. h. Flame Spread - I. S. Base: STM E84; Flame Spread 3, Smoke Developed 0. i. Flame Spread - Stone Mist: ASTM E84; Flame Spread 10, Smoke Developed 30 ]. 320A HORIZONTAL ZONING OF WIND PRESSURE: Reference heights are as follows: - [ See the Design Drawings or at maxi mum 9.1m measured vertically. - The CA to divide each building face into compartments, which approximate areas of equal wind pressures. - Compartment boundaries to coincide with the location zones as define by ASCE 7-95, wind tunnel studies or other rational method. - Elevations to be divided with a horizontal separation at intervals not to exceed 9.1m measured vertically ]. 330A INTEGRITY OF VENTILATED RAINSCREEN: 330A INTEGRITY OF VENTILATED RAINSCREEN: - VENTING REQUIREMENTS RAINSCREEN CLAD WALLS The minimum vent area is required to ensure fast pressure equalisation of the interlocking cavity behind the EPS insulation. The horizontal spacing between vents will also affect the rate of pressure equalisation. A minimum vent area of cm 2 is required for every 28 m 2 of wall area. Spacing between vents not to exceed 6m. - IMPACT LOADING: The finished wall(s) must have the impact resistance(s) as recommended by BS 8200 or BRE information paper No. IP 19/81 or as specified by the Structural engineer or as recommended by the manufacturer from standard/combination options: Dryvit mesh options: Standard TM 4 Nm Standard Plus TM 6 Nm Intermediate 12 Nm Panzer 15/Standard TM 18 Nm Panzer 20/Standard TM 40 Nm Panzer 15/Standard Plus TM 20 Nm Panzer 20/Standard Plus TM 42 Nm - [ VENTING REQUIREMENTS RAINSCREEN CLAD WALLS, A minimum vent area of cm 2 is required for every 28 m 2 of wall area. Spacing between vents not to exceed 6m ]. - [ IMPACT LOADING: The finished wall(s) must be designed to withstand the following impact resistance(s): [ Ground floor: 42 Nm, using Dryvit Panzer 20 + Standard Plus Mesh or as advised by the manufacture. First to fifth floors: 6Nm, using Standard Plus Mesh or advised by the manufacture] Note: Dryvit systems can be designed to achieve desired impact loading by combining the H92/9 of 13

11 achieve desired impact loading by combining the above options, e.g. to achieve 42Nm impact loading insert,..42 Nm, using Panzer 20 and Standard Plus Dryvit mesh or as advised by the manufacturer. 350A DEFLECTION UNDER WIND LOAD: - The underlying wall assembly is limited in deflection to minimise transfer of stresses to the exterior coatings. A structure that is to flexible under wind load conditions, will stres s the exterior coatings and may result in cracks. - At positive and negative applications of the design wind pressure the maximum normal deflection for the listed components must not exceed [ insert e.g. 1/240 of the span between supports ]. 350A DEFLECTION UNDER WIND LOAD: At positive and negative applications of the design wind pressure the maximum normal deflection for the listed components must not exceed: [ 1/240 of the span between supports ]. 380A CONSTRUCTION/MOVEMENT JOINTS: 380A CONSTRUCTION/MOVEMENT JOINTS: The construction or expansion joints must align with the movement joints (note: Expansion/Movement joints are the responsibility of the Designer/CA and to be indicated on the Design Drawings, to be installed by others). Movement joints should be incorporated where: 1. Expansion joints occur in the substrate system. 2. Building expansion joints occur. 3. Continuous elevations at intervals not exceeding 23m. measured horizontally. 4. [ Prefabricated panels abut one another. 5. System meets floor lines in timber frame construction. 6. The rainscreen cladding butts dissimilar materials. 7. The substrate material changes. 8. Significant structural movement occurs such as changes in roofline, building shapes or structural system. 9. Other special locations ]. Form joints accurately to detail and in locations shown on the [ Design] Drawings. If modifications to any joint location or design are necessary on site, agree revisions with CA before proceeding. Movement joints should be incorporated where 1. Expansion joints occur in the substrate system, location as indicated on the Design Drawings. 2. Building expansion joints occur. 3. Continuous elevations exceed 23m. [ 4. Other special locations, insert as applicable ]. 381A SLOPE LIMITATIONS: - The system is not intended to be used in areas that may be classified as roofs and will need to support structural loads. Also long or shallow slopes will weather faster and require more frequent maintenance and should be avoided. - The slopes on ledges or inclined surfaces must not be less than 1:2 or 28 degrees, and the length must not exceed 305 mm. 381A [ SLOPE LIMITATIONS: The slopes on ledges or inclined surfaces must not be less than 1:2 or nominally 28 degrees, and the length must not exceed 305mm ]. 450A VAPOUR CONTROL LAYER: - Determine the interstitial condensation risk of the rainscreen wall using the method described in BS 5250 Appendix D. Designer to provide all necessary information to produce calculations - [ The designer to determine the interstitial condensation risk of the wall assembly and provide a suitable vapour control layer as required ]. 450A VAPOUR CONTROL LAYER: - Determine the interstitial condensation risk of the rainscreen wall using the method described in BS 5250 Appendix D. Designer to provide all necessary information to produce calculations - [ The designer to determine the interstitial condensation risk of the wall assembly and provide a suitable vapour control layer as required ]. H92/10 of 13

12 490A FIRE BARRIERS: 490A FIRE BARRIERS: - - [ Lamella or Slab] mineral wool non-combustible material to BS 476:Part 4. - Size: Minimum 100 mm x total thickness of external wall insulation. 1. [ Install barriers at every floor level from third storey or as indicated on Design Drawings ] 2. [ Barriers to be [ adhesively or mechanically] fixed with Dryvit Detail Mesh applied over barrier to lap adjacent EPS on either side a minimum of 50mm to manufacturer recommendations. Consult Dryvit UK Ltd with guidance on how to prepare face of slab fixed to substrate ]. - [ Lamella ] mineral wool non-combustible material to BS 476:Part 4. - Size: Minimum 100 mm x total thickness of external wall insulation. 1. [ Install barriers at every floor level from third storey or as indicated on Design Drawings ] 2. [ Barriers to be [ e.g. adhesively ] fixed with Dryvit Detail Mesh applied over barrier to lap adjacent EPS on either side a minimum of 50mm to manufacturer recommendations. Consult Dryvit UK Ltd with guidance on how to prepare face of slab fixed to substrate ]. PRODUCTS 770A SEALANT JOINTS: Sealants are used to weatherproof transitions to other materials within the wall assembly and should be tested for compatibility in accordance with standard methods. - Location(s): [ Insert e.g. Seal around windows, doors where applicable and insert at building movement joints ]. 1. Sealant: [ Insert e.g. Dryvit 1 TM Low modulus sealant with baking filler ]. 2. Colour: [ Insert, e.g. White or to be selected from the standard range. Also see Work Section Z22 ]. 3. [ Form in accordance with Work Section Z22 and system manufacturer's recommendations using any necessary joint filler, backing strips, etc ]. 4. The sealant to be tested as follows: a. Adhesion In Peel: ASTM C794; 89 kg/m. minimum. b. Tensile 50% Elongation: ASTM C1135 (Modified); dry 138 kpa, 1 and 7 day immersion 104 kpa, frozen 138 kpa. c. Modulus of 50% Elongation: ASTM C1135 (Modified); 241 kpa at -40 C, 138 kpa at 82 C. 770A SEALANT JOINTS: - Location(s): [ Seal around windows, doors where applicable and insert at building movement joints ]. 1. Sealant: [ Dryvit 1 TM low modulus silicone sealant or equal ]. 2. Colour: [ White ] 3. [ Form in accordance with Work Section Z22 and system manufacturer 's recommendations using any necessary joint filler, backing strips, etc ]. FABRICATION AND INSTALLATION 910A INSTALLATION 910A [ INSTALLATION GENERALLY: - GENERAL REQUIREMENTS 1. The Dens Glass Gold sheathing to be installed in accordance with Georgia- Pacific Bulletin #94-02 [ the manufacturer s instructions as supplied by Dryvit UK Ltd]; Dens Glass Gold Application and Installation Procedures for Dryvit Infinity System. 2. The Infinity System to be installed in accordance with the current Dryvit Infinity Installation Ins tructions DS145, and Infinity Installation Details DS Infinity base coat surfaces in contact with sealant to be coated with Demandit or Colorprime. 1. The sheathing to be installed in accordance with the manufacturer s instructions, for application and installation procedures for the System. 2. The System to be installed in accordance with the current Installation Instructions and Details. 3. Base coat surfaces in contact with sealant to be coated with [ Dryvit Demandit or Colorprime ]. 4. Sealant must not be applied directly to textured finishes or uncoated base coat. 5. The base coat to be applied in accordance with the current H92/11 of 13

13 Colorprime. 4. Sealant must not to be applied directly to textured finishes or uncoated base coat. 5. The base coat to be applied in accordance with the current Dryvit Infinity Installation Instructions (DS145).Sealants to be installed in accordance with Dow Corning Procedure for the Installation of Dow Corning Silicone Building Sealants With Dryvit Infinity Systems. - APPLICATION: Dryvit Applicator Training Programme. Dryvit operates a training programme for Specialist Installers of their manufactured EIFS systems. The levels of applicators to be employed to undertake the work depend upon the type of contract. Contact Dryvit for advice. There are three levels of training: Level 1: Applicator must attend a combined practical and theory training course to demonstrate they are conversant in the use of the Dryvit materials, associated tools and basic details skills. Level 2: Advanced Applicator level card holder is continuation of level 1 applicator but with advanced detail skills and a measure of the continued practical experience. Level 3: Supervisor level cardholder is a senior applicator and must provide references of Dryvit system applications to demonstrate their practical experience. Must complete a multiple choice paper on Dryvit materials and their applications and must be capable of training the applicators under their supervision. accordance with the current Installation Instructions. 6. Sealants to be installed in accordance with sealant manufacturer s procedure recommended for the System.- APPLICATION: Installation to be carried out only by a Specialist Installer using operatives participating in the Dryvit Applicator Traini ng Programme. [ One operative on site to be trained to level 3 - Supervisor level, as agreed with the CA ]. 950A ACCEPTANCE OF BACKGROUNDS: Dryvit/Specialist Installer must be consulted on obtaining the acceptance of the background, especially when a guarantee on materials supplied by Dryvit and the Installers guarantee on workmanship and installation are required. [ Insert e.g. Dryvit/Specialist Installer must be consulted on obtaining the acceptance of the background ]. 950A ACCEPTANCE OF BACKGROUNDS: Before preparation or application of coatings ensure that: - Backgrounds are secure, adequately true and level to achieve specified tolerances, free from contamination and loose areas, reasonably dry and in a suitable condition to receive specified coatings. - All cutting, chasing, fixing of concealed conduits, service outlets and the like, and making good of the background, is completed. - [ Dryvit/Specialist Installer must be consulted on obtaining the acceptance of the background ]. H92/12 of 13

14 The Specification clauses and guidance notes in this document (the Information) are based on those in the NBS Subscription Service and shall be subject to the provisions of the Copyright Notice, Conditions of Sale and Disclaimer upon which that service is supplied, whether made available as part of that Service or otherwise, and references in those provisions to NBS shall be deemed also to include a reference to Dryvit (UK) Ltd in accordance with its disclaimer applicable to such Information. The Information, to the extent that it relates exclusively to products manufactured, marketed or supplied by Dryvit (UK) Ltd, is published under the sole authority of Dryvit (UK) Ltd. The Information is not intended to be exhaustive and is given in good faith to assist in defining specifications for the installation of Dryvit systems. All users and others must verify the Information and ensure its suitability for the particular applications for which it is required. Dryvit (UK) Ltd and NBS Ltd have no control over site conditions or installation procedures and accordingly neither of them can accept any liability for loss or damage which may arise from the application or the Information and they expressly exclude liability for such loss or damage to the extent permitted by the law. Dryvit UK Ltd, Unit 4 Wren Park Hitchin Road Shefford Bedfordshire SG17 5JD Tel: Fax: ukenquiries@dryvit.com web: H92/13 of 13