Toplite _ aircrete blocks. from Tarmac Topblock

Transcription

1 Toplite _ aircrete blocks from Tarmac Topblock

2 Toplite Introduction Introduction 3 Product selector 4 Toplite GTI 5 Toplite Standard 5 Toplite 7 5 Toplite Foundation 7 Toplite Coursing bricks 8 Toplite Floor 9 Application 10 Walls below DPC 10 Internal walls 10 Separating walls 10 Toplite in flats 10 External walls 12 Thermal insulation 12 U-values 13 Design 14 Safe handling 14 Movement control 14 Mortar 14 Wall ties 15 Low unit weight Most sizes of Toplite blocks meet the health and safety standards for single-person repetitive handling, helping to protect you from injury. Fast build blocks Toplite blocks are light and easy to handle, decreasing your build time. Thermal insulation Toplite blocks have exceptional thermal insulation properties which combined with added insulation can meet the requirements of Part L of the Building Regulations. Sound Toplite blocks have excellent sound insulation properties that can comply with the Robust Details Specification of the Building Regulations. Fire resistant The non-combustible properties of Toplite blocks mean that most constructions will surpass the requirements of the Building Regulations. High loadbearing A wide range of strengths are available in Toplite blocks to cater for the requirements of general housing and other buildings. Easy to cut Toplite blocks are easy to cut and chase using basic hand tools. Cost-effective Toplite blocks offer cost-effective building methods. Traditional Toplite blocks offer proven, risk free and familiar building methods. Availability Toplite blocks are widely and readily available. Recyclable Toplite blocks are recyclable. Surface finishes Toplite blocks offer an ideal background for drylining, plaster, render and fixings. The UK s top block solution Tarmac Topblock offers a complete range of aircrete, dense and lightweight products. As a UK market leader, you can expect our blocks to meet the most demanding of building requirements. Using Tarmac Topblock you can take advantage of: Choice Offering you a product for every application from our 4 key brands Durox, Toplite, Hemelite and Topcrete. Quality products Continued investment in our extensive network of production facilities means that you should only get the highest quality products. Customer service We can be relied upon to deliver service, friendly advice and partnership. Reliability We have set a national target for on-time deliveries and aim to inform you of any likely delays. Sales support Helping you with well located sales offices and an experienced external sales team, serving local, regional and national customers. Technical support Dedicated technical services, providing you with vital advice on the suitability of Tarmac Topblock products. Innovation Continuously developing our range of innovative products and services, to respond to your needs. Responsibility Taking our corporate responsibility seriously, by sharing best practice in safety, health and environment for all. Part of the Tarmac Group Tarmac can provide you with a range of products for virtually every construction purpose. 2

3 Toplite Introduction Toplite Toplite aircrete is a modern construction material with excellent thermal and acoustic properties. It is a versatile material which is able to provide solutions below ground in foundation walls, in suspended beam and block floors and all types of internal and external walling situations. For many years Toplite products have been used for the inner leaf of cavity walls in conjunction with various insulation materials, making a valuable contribution to the overall thermal performance of the building. Authority Toplite products are BSI Kitemarked to BS EN and are manufactured under a Quality System complying with BS EN ISO They conform to the Special Category of Manufacturing Control requirements specified in BS The British Board of Agrément has independently assessed Toplite products. BBA Certificate 02/3896 covers Toplite GTI, Standard, 7 and Foundation blocks. BS EN Environmental All Topblock manufacturing plants operate an environmental management system conforming to ISO: All sites are independently assessed for compliance by BSI. Certificate No Summary ratings applicable to Toplite constructions can be found in The Green Guide to Housing specifications. These include constructions that achieve A rating and thereby qualify for credits when projects are subject to an environmental rating such as Ecohomes. Appearance Toplite blocks are white to grey with a characteristic keyed surface pattern. Each product type is supplied in shrinkwrapped packs for protection and easy identification on site. Working with Toplite Toplite products have excellent working characteristics. They are light and easy to handle and quick to install. They can be easily cut, chased and fixed into. Toplite is suitable for finishing with render, cladding, plaster or drylining. 3 National Sales Helpline:

4 Toplite Product selector 440mm Walls 215mm 215mm 65mm Application Cavity inner leaves and / or solid walls Toplite GTI Toplite Coursing or Standard bricks Separating walls Toplite Standard Toplite Coursing bricks Higher loadbearing walls Toplite 7 Toplite Coursing bricks Foundations Application Solid walls below dpc 440mm Toplite Foundation 215mm 440mm 215mm Cavity walls below dpc Toplite GTI, Standard or 7 440mm 535 or 360mm Floors Width Application Beam and block floors Toplite Floor 4 Technical Services:

5 Toplite GTI, Standard and 7 Toplite Toplite combines low unit weight with high thermal insulation, in strengths from 2.9 to 7.3 N/mm 2. Toplite GTI offers a high level of thermal insulation and can be used to reduce the amount of additional insulation. It is ideally suited for the construction of inner leaves and solid external walls. Toplite Standard can be used for all general-purpose walling applications including inner leaves, solid walls, internal partitions and walls below DPC. Toplite Standard is recommended for use in separating walls including those conforming to Robust Detail E-WM-6, as well as other key applications such as the rendered outer leaf of cavity walls. Material properties GTI Standard 7 Compressive strength to BS EN (N/mm 2 ) Equivalent compressive strength to BS 6073 (N/mm 2 ) Material dry density (kg/m 3 ) Thermal conductivity 3% moisture content Moisture movement (mm/m) (shrinkage) <0.70 for all products Typical airtightness (m 3 /(h.m 2 50 Pa) 100mm blocks all grades, no finish Toplite 7 is suitable for more demanding loadbearing applications whilst retaining the characteristic low unit weight of aircrete. It may also be used in separating walls including those conforming to Robust Detail E-WM for all products Sizes and unit weights (kg) Block width (mm) GTI Standard Laid weights (kg/m 2 ) Block width (mm) GTI Standard Notes Unit and laid weights, which are given for design purposes, are approximate only and based on 3% moisture content Dimensional tolerance to BS EN 771-4: Length +3/-5, width +3/-3, height +3/-5 5

6 Toplite GTI, Standard and 7 Fire Toplite blocks are noncombustible and conform to Class O rating for the surface spread of flame. The fire resistance values shown are in accordance with BRE Report Guidelines for the Construction of Fire-resisting Structural Elements (1988). The application of finishes will generally improve the fire resistance. Further details are available. Sound insulation Toplite blocks may be used to provide acoustic insulation between internal rooms. The Building Regulations Approved Document E requires certain internal walls and floors in dwellings to meet a performance standard of 40 R w db. This can be met, for example, using 100mm Toplite GTI or Standard finished with plaster or drylining. Sound reduction values of other Toplite products are shown in the table opposite. Fire resistance of walls single leaf wall Fire resistance, no finish (hours) GTI: minimum width (mm) loadbearing non-loadbearing Standard or 7 : minimum width (mm) loadbearing non-loadbearing Note Check the relevant product pages for available sizes Sound reduction values single leaf wall Finish No Lightweight Drylining finish plaster GTI: weighted sound reduction index, (R w db) 100mm mm mm Standard: weighted sound reduction index, (R w db) 100mm mm mm : weighted sound reduction index, (R w db) 100mm mm mm Notes Finishes to both wall faces are assumed Values are based on technical assessment and tests to BS EN National Sales Helpline:

7 Foundation 7.3 N/mm 2 213* 226* 246* Toplite Foundation Toplite Foundation Foundation is produced specifically for use below DPC in solid walls. It replaces the inner and outer leaf, wall ties and concrete cavity fill associated with traditional construction methods. This means that construction time may be halved compared to cavity walling and that the wall becomes stable soon after laying, eliminating the risk of collapsed cavities. Applications Foundation can be used to support cavity, solid walls or frame constructions. Owing to its excellent insulating properties, the product provides perimeter insulation to ground floors. U-values can be calculated upon request. Toplite Foundation is suitable for use in Class DS-1, DS-2 and DS-3 sulfate soil conditions as confirmed by British Board of Agrément Certificate No. 02/3896. The appropriate width of Toplite Foundation should be selected to suit the width of cavity or solid wall that requires supporting above DPC. For advice on the selection of mortar refer to page 14. DPC Insulation Screed Material properties Toplite Foundation Toplite Foundation blocks below DPC Foundation Compressive strength to BS EN (N/mm 2 ) Equivalent compressive strength to BS 6073 (N/mm 2 ) Material dry density (kg/m 3 ) Thermal conductivity 3% moisture content Size and unit weights (kg) Coursing height (mm) 215 Block width (mm) Foundation 3.6 N/mm Foundation 7.3 N/mm * 19.6* 21.3* Laid weights (kg/m 2 ) Coursing height (mm) 215 Block width (mm) Foundation 3.6 N/mm Note Unit and laid weights, which are given for design purposes, are approximate only and are taken at 3% moisture content. *Manufactured to order. 7 Technical Services:

8 Toplite Coursing bricks Toplite Coursing bricks Coursing bricks are designed for use with the range of Toplite blocks, to avoid thermal bridging Typical application and minimise wastage. Application Toplite Coursing bricks should be used for general coursing work, infilling small areas of wall such as between timber floor or roof members as well as closing cavities at eaves, reveals and sills. Their use will eliminate cutting and wastage. Width 215mm 65mm Material properties Brick width (mm) Compressive strength to BS EN (N/mm 2 ) Equivalent compressive strength to BS 6073 (N/mm 2 ) Material dry density (kg/m 3 ) Thermal conductivity 3% moisture content Size and unit weights (kg) Brick width (mm) GTI: 2.9 N/mm 2 - Unit weight (kg) Standard: 3.6 N/mm 2 - Unit weight (kg) : 7.3 N/mm 2 - Unit weight (kg) Bricks per pack Note Unit and laid weights, which are given for design purposes, are approximate and based on 3% moisture content 8

9 Toplite Floor Toplite Floor blocks Floor blocks are suitable for use in suspended floors in conjunction with precast concrete beams. They are light and quick to install, and provide effective sound and thermal insulation for ground and internal floors meeting the requirements of the Building Regulations. The use of Toplite Floor blocks can achieve economy in the overall design of the floor: firstly by a reduced dead load; secondly the size of the block allows much more flexibility in beam spacing, allowing fewer beams to be used. Applications Toplite Floor blocks are suitable for use in beam and block suspended ground and internal The requirements of Building Regulation E2 Protection against sound within a dwelling house can be easily met using a beam and block internal floor finished with a minimum 50mm sand and cement screed and plasterboard ceiling. Tests commissioned by the Aircrete Products Association confirm that the airborne sound reduction (R w ) for a floor finished with a 50mm sand and cement screed and plasterboard ceiling is 51 R w db. This exceeds the minimum required value of 40 R w db. Screed Transverse load The blocks have been tested at a 440mm and 535mm clear span to sustain a point load of 3.5KN. This load was transferred via a 100mm x 100mm steel plate. Thermal Insulation The use of Toplite Floor blocks will reduce the amount of ground floor insulation needed compared to the use of denser floor blocks. This will be further improved when used in combination with Toplite Foundation blocks. Concrete floor beam floors in single occupancy dwellings under domestic loading. Where high point loading is anticipated, such as in garages, a reinforced structural topping must be used. Where the floor loading dictates closer beam spacing, a 440 x 215 x 100mm Toplite Standard block may be used, spanning its 215mm dimension. Coursing slips to in-fill between beam-ends are available in a 37mm bedding height. For 175mm deep beams Toplite Coursing bricks are available. Toplite flooring block Plasterboard Timber battens Typical beam and Toplite block intermediate floor Material properties Floor Compressive strength to BS EN (N/mm 2 ) 3.6 Equivalent compressive strength to BS 6073 (N/mm 2 ) 3.5 Material dry density (kg/m 3 ) 630 Thermal conductivity 3% moisture content 0.15 Size and unit weights (kg) Block size on plan (mm) 440 x 215* 440 x x Block width (mm) Floor Notes Unit and laid weights, which are given for design purposes, are approximate and based on 3% moisture content *Available as Toplite Standard spanning the 215mm dimension 1. Supplied from Ford Plant 2. Supplied from Alfreton Plant 9 National Sales Helpline:

10 Toplite Application Walls below DPC Toplite products can be used to construct walls below ground. They can be used in sulfate soil conditions as shown in the table opposite and as confirmed by British Board of Agrément Certificate No. 02/3896. In addition they are resistant to the freeze / thaw conditions likely to occur below the DPC, as confirmed by tests to MOAT 12. Toplite Foundation blocks should be specified to construct mm solid walls below ground. They are intended to support cavity or solid walls of equivalent width above ground. Toplite Standard (or any higher strength Toplite product) can be used to construct internal and external walls below ground. Toplite GTI is recommended for use in the construction of inner leaves only below ground and is suitable for use in Class D-1 sulfate soil conditions as confirmed by British Board of Agrément Certificate Nos. 02/3896. Internal walls Any grade of Toplite can be used for the construction of internal walls. For partitions in dwellings these products can be used to provide good levels of airborne sound insulation as well as a suitable background for finishes and for fixings. For commercial and industrial applications Toplite may be used to provide sound insulation, fire resistance and structural strength. Sulfate soil conditions Toplite aircrete blocks DS-1 DS-2 DS-3 Toplite Foundation Toplite GTI* Toplite Standard Toplite 7 Note *Suitable for use as the inner leaf of cavity walls and internal walls below dpc Certain internal walls are required to provide a level of sound insulation as required by the Building Regulations E2. Walls between bedrooms, or a room containing a water closet, and other rooms, need to provide the minimum sound insulation of 40 R w db. The constructions on page 11 have been assessed and / or laboratory tested to demonstrate the performance level required by Approved Document E. Separating walls The Building Regulations require separating walls to provide reasonable resistance to sound transmission. Guidance on suitable Toplite constructions capable of meeting the specified performance is shown on page 11. This includes constructions that can be built to satisfy Robust Detail E-WM-6. The use of Robust Details provides an alternative to pre-completion testing for demonstrating compliance with Part E for new build dwellings. Robust Details should be used in accordance with the scheme requirements including plot registration. The performance of separating walls is highly dependent on the design, detailing and good workmanship of the associated flanking construction. Further guidance is given in the Topblock Design Guide. Toplite in flats Toplite can be used to construct flanking and separating walls based on Robust Detail specifications. Flanking walls Toplite can be used for the inner leaf of the external walls in accordance with the following Robust Detail separating floors without the need to undertake routine pre-completion testing. Robust Detail E-FC-3 Use Toplite Standard or 7 of minimum 100mm width. Robust Detail E-FC-4 Use Toplite GTI, Standard or 7 of minimum 100mm width. 10 Technical Services:

11 Toplite Application New Dwellings - Robust Details Construction elements Methods of compliance RD ref Recommended solution Separating walls Robust Details E-WM-6 Pre-completion testing not required RD - no site testing required Nominal 8mm parging Drylining (8kg/m 2 min) 2 x Toplite Standard 2 x 100mm Toplite 7 75mm min cavity New Dwellings - Pre-completion testing Construction elements Methods of compliance Recommended solution Separating walls Constructions requiring pre-completion testing in accordance with Approved Site testing required Document E or other technical guidance e.g. BBA certification 2 x Toplite Standard 2 x 100mm Toplite 7 or field test data 13mm drylining or plaster (10kg/m 2 min) 75mm min cavity New Build Dwellings and Extensions Construction elements Methods of compliance Recommended solution Internal Walls Approved Document E prescriptive solutions or Topblock constructions which have been shown by testing to meet the regulations Plaster or drylining Wall blocks comprising 100mm Toplite GTI 100mm Toplite Standard 100mm Toplite 7 Internal Floors No site testing required Approved Document E prescriptive solutions or Topblock constructions which have been shown by testing 50mm min sand/cement screed Infill blocks comprising 100mm Toplite Floor to meet the regulations Any ceiling finish New Build Rooms for Residential Purposes* Any of the recommended solutions shown for the New Build Dwellings (above) can be specified for separating walls for use in rooms for residential purpose. In addition the solutions shown below may be used: Construction elements Methods of compliance Recommended solution Separating Walls Site testing required Constructions requiring pre-completion testing in accordance with Approved Document E or other technical guidance e.g. BBA certification or field test data 13mm plaster (10kg/m 2 min) 215mm Toplite Standard 215mm Toplite 7 13mm plaster (10kg/m 2 min) 215mm Note *Rooms for residential purposes include hotels, hostels, boarding houses, halls of residence and residential houses but exclude hospitals or similar establishments used for patient accommodation 11

12 Toplite Application Separating walls The Robust Detail testing programme that led to the aircrete separating wall specification (E-WM-6) demonstrated that these constructions performed as well as higher density aggregate block constructions. As a result of this, Table 3 of the Robust Details handbook allows Toplite cavity separating walls to be used in combination with the separating floor constructions E-FC-1, E-FC-3 & E-FC-4. This indicates that Toplite blocks can be used in both the flanking and separating walls, thereby gaining the twin benefits of excellent thermal and sound insulation. When using these options, however, the floor will be subject to pre-completion testing. Work continues in developing additional Toplite specifications Toplite separating & flanking walls in flats RD ref No E-WM-6 (Conventional mortar) Robust Detail Separating Wall through the Robust Details programme and it is advisable to refer to Topblock Technical Services or our website for the most up-to-date specifications. External walls Toplite Blocks 2 x 100mm with 75mm cavity Toplite Standard Toplite 7 Toplite blocks may be used to construct cavity and solid external walls. For cavity construction the minimum leaf width will normally be 90mm. Toplite blocks are suitable for a range of external finishes as shown in the table below. In a single leaf wall the minimum Flanking wall Toplite inner leaf 100mm min Toplite GTI, Standard Toplite 7 Robust Detail separating floor* RD ref No E-FC- 1, 3 & 4 *In accordance with Table 3 of the Robust Details handbook these separating floors require pre-completion testing width of Toplite, with or without rendering, may be selected from BS Thermal insulation Some typical construction solutions to comply with Building Regulation Part L, Conservation of Heat and Power, are shown on page 13. As insulation material sizes and their thermal conductivity are subject to change, it is recommended that the U-value of constructions be periodically confirmed by reference to Technical Services or the Topblock website. External wall construction External finish Comments Clear cavity Clear cavity Partial cavity fill Full fill Any external cladding material such as timber boarding or hanging tiles on battens Two coats of designation (iii) sand/cement render Two coats of designation (iii) sand/cement render Two coats of designation (iii) sand/cement render Both leaves may be any grade of Toplite block. Additional insulation may be required The inner leaf may be any grade of Toplite block. The outer leaf should be Toplite Standard or 7 The inner leaf may be any grade of Toplite block.the outer leaf should be Toplite Standard or 7 The inner leaf may be any grade of Toplite block. The outer leaf should be a Topblock Hemelite or Topcrete block Note Any grade of Toplite includes GTI, Standard or

13 Toplite Application Thermal insulation (continued) From April 2006 Approved Document L1A, (new dwellings) of the Building Regulations, was introduced so that compliance is demonstrated by showing that the Dwelling emission rate (DER) is no greater than the Target emission rate (TER) of a notional building of the same size as the proposed house. The TER is calculated using standard defaults for the fabric insulation and the heating and hot water systems that are embedded within the SAP 2005 software, resulting in a 20% reduction in CO2 emissions compared to the previous requirements. The actual level of fabric insulation required will be Sloping or flat roof U-value = 0.14 W/m 2 K Windows and doors U-value = 1.8 W/m 2 K Gas boiler with a minimum Sedbuk Of 86% dependant upon a number of factors including the fuel type used and the efficiency of the heating system. The diagram below shows typical U-values for the exposed elements of the building, assuming that the fuel type is mains gas, which could form the starting point for the DER calculation. Typical U-values Roof with ceiling U-value = 0.14 W/m 2 K Roof window or rooflights U-value = 1.8 W/m 2 K Ground floor U-value = 0.20 W/m 2 K Exposed walls U-value = 0.30 W/m 2 K Approved Document L1B covers the standard of insulation required when building work is carried out on an existing dwelling. When constructing an extension to a dwelling minimum elemental U-values apply as shown in the table below. Elemental U-values for extensions to existing dwellings Element Dwellings U-value (W/m 2 K) Walls 0.30 Floor 0.22 Roof insulation at ceiling level 0.16 Roof insulation at rafter level 0.20 Roofs (flat) 0.25 Windows, roof windows & rooflights 1.80 Doors with more than 50% of internal face glazed 2.20 Other doors 3.00 U-values using clear cavity with thermal laminates Internal finish U-value of 100mm inner leaf (W/m 2 K) Thermal laminate Toplite GTI Toplite Std Toplite 7 50mm ThermaLcheck K (2.27 m 2 K/W) mm ThermaLine Super (2.32 m 2 K/W) mm ThermaLine Super (2.55 m 2 K/W) National Sales Helpline:

14 Toplite Application U-values using partial fill insulation Insulation 40mm Kingspan TW50 k = W/mK with low-e cavity* Note Insulation Resistance of low e cavity m2k/w 45mm Kingspan TW50 k = W/mK with low-e cavity* Note Resistance of low e cavity 0.64 m2k/w Internal finish U-value of 100mm inner leaf (W/m 2 K) Thermal laminate Toplite GTI Toplite Std Toplite 7 13mm Dense plaster mm Lightweight plaster mm Plasterboard on dabs mm Plasterboard on dabs Internal finish U-value of 100mm inner leaf (W/m 2 K) Thermal laminate Toplite GTI Toplite Std Toplite 7 13mm Dense plaster mm Lightweight plaster mm Plasterboard on dabs mm Plasterboard on dabs U-values using full fill insulation Insulation 75mm Dritherm 32 k = W/mK Internal finish U-value of 100mm inner leaf (W/m 2 K) Thermal laminate Toplite GTI Toplite Std Toplite 7 13mm Dense plaster mm Lightweight plaster mm Plasterboard on dabs mm Plasterboard on dabs Toplite Design Safe handling Aircrete is an inherently lightweight material, which ensures that the majority of Toplite aircrete blocks fall within the guidance (see Health and Safety Executive Construction Sheet 37) for single-person repetitive handling. Some Foundation blocks in widths of 260mm to 300mm may exceed the nominal 20kg guidance at the conventional 215mm coursing height. Movement control Movement joints should be provided in accordance with BS generally at intervals of 6m. Movement joints are not usually necessary for internal walls in dwellings. Flat metal tie with one end de-bonded in alternate courses Joint filler In areas of concentrated stress, such as above and below openings, consideration should be given to the introduction of bed joint reinforcement. Mortar The mortar type should be selected taking into account durability, structural strength and provision for movement. Detailed guidance on the selection of mortars is given in BS and BS For guidance on the approximate weights of Toplite blocks refer to the relevant product pages. Typical movement joint Sealant where required For work above ground level (DPC), mortar designation (iii) will normally be satisfactory. 14 Technical Services:

15 Toplite Design Mortar (continued) Below ground level, mortar designation (iii) or (ii) may be used in accordance with BS Stronger mixes, which may be required for structural reasons, are not recommended for use with our aircrete products. All mix proportions are given by volume. Suggested mortar mixes Work above DPC - mortar designation (iii) a) 1 portland cement, 1 hydrated lime, 6 sand b) 1 portland cement, 6 sand + plasticiser c) 1 masonry cement 5 sand Work below DPC - mortar designation (ii) a) 1 portland cement 4 sand + plasticiser Notes The sand should conform to BS 1200 Factory produced mortars or carefully gauged site mixed mortars should be used Wall ties Use wire butterfly or double triangle ties complying with BS 1243, or other ties complying with DD 140-2, at the density and positioning required by the Building Regulations and BS & 3. The use of vertical twist ties should generally be avoided when using aircrete blocks unless the cavity width exceeds 75mm. For separating walls, butterfly ties or ties conforming with Type A as specified in Approved Document E should be used. Specification Design Guide More detailed design information including advice on structural design, durability and movement control can be found in the Topblock Design Guide. Sitework Guide More detailed site guidance including advice on site storage, internal and external finishes can be found in the Topblock Sitework Guide. Blockwork to: (state location) Blocks to BS EN 771-4: Toplite aircrete concrete blocks Compressive Strength (N/mm 2 ) Manufacturer: Tarmac Topblock Limited BS EN Grade and compressive strength: *GTI 2.9 *Standard 3.6 * *Foundation 3.6 *Foundation 7.3 *Floor 3.6 Shape and dimensions: Wall block: 440mm long x mm width x 215mm high (GTI, Standard and 7 ) Foundation block: 440mm long x mm width x 215mm high Floor block: 440mm long x mm width x 360/535mm wide Coursing brick: 215mm long x mm width x 65mm high Note * Delete as applicable 15

16 CI/SfB September 2006 Ff4 Where do I find more? Tarmac Topblock offer a complete range of aircrete, lightweight and dense products. As a UK market leader you can expect our blocks to meet the most demanding of building regulations and requirements. To make contact could not be easier! National Sales Helpline Call us on: Technical Helpline Call us on: technical.services@tarmac.co.uk Literature requests: Call us on: marketing@tarmac.co.uk Quote reference L110 The product brochures available include: Durox - large format aircrete blocks Hemelite & Topcrete - lightweight & dense aggregate blocks Durox System - thin joint blocks Tarmac Topblock Limited Millfields Road Ettingshall Wolverhampton West Midlands WV4 6JP Website: Tarmac and the T mark are registered trademarks of the Tarmac Group. Although Tarmac Limited does its best to ensure that any advice, recommendations or information it may give is accurate, no liability or responsibility of any kind (including liability for negligence) is accepted in this respect by Tarmac Limited, its staff or agents. Claims and statements made by Tarmac Limited regarding its products refer to those which have been properly handled on site. Tarmac Limited cannot accept any liability or responsibility of any kind (including liability for negligence) for problems caused by the acts or omissions of third parties or by poor practices.