sheetseal 226. £1592. sheetseal 226

 
 £1592sheetseal 226  BENEFITS l Water and water vapour barrier l Radon barrier l Elastic and flexible l Easily applied and

Size: 300mm x 20m roll. The initial application. SKU. 226, as well as Toughseal, to form watertight joints. RIW . Compare Bookmark. Address. Weepholes DPC Cavity Drain Overtape Sheetseal 9000 DPC / Cavity Tray Sheetseal 226 lapped over DPC Sub – Soil Drainage 11 | P a g e 7. View. Request Callback; 01753 944200;SHEETSEAL 226 SHEETSEAL GR SHEETSEAL 9000 DPC HEVISEAL TOUGHSEAL CEMENTSEAL CEMENTFLEX EXTERNAL TANKING External tanking is the application of a waterproof membrane to the outside of a basement or sub-structure. Impermeable: Impermeable to water under 10 bar hydrostatic pressure (100m head of water) yet allows the free passage of water vapour. VAT) Add to basket. Add to basket. CE Marketing | Technical Downloads | RIW. Search. 01/07/2016. We have almost a century of experience, with a modern range of waterproofing solutions for above, below and at ground level. RIW Sheetseal 226 - a flexible sheet membrane, used over the Liquid Asphaltic Composition, for reinforcing areas subject to movement. Cavity Drain; Double Drain;. VAT) Enquire Now. Overview. Sheetseal 226 should be applied by removing the separating paper and pressing the adhesive coated surface firmly onto the prepared substrate. Proofex Engage 1. pdf. Sheetseal 226. Waterproof Foam for Movement Joints. 72 (inc. RIW has a broad range of high performance structural waterproofing. When designing Type A structures (as classified in BS8102:2009), the product applied correctly, is capable of providing the. Simple to detail in critical areas. The liquid applied system also provided a greater tolerance to poor weather conditions, whilst. Radweld works its way through the system to target radiator leaks, without damaging or clogging the system. RIW manufacturer products such as the RIW Cementseal, a waterproof coating that is available to purchase from our site in 15kg. High performance, polymeric DPC. Generally, waterproof membranes are installed horizontally onto a concrete blinding layer and vertically onto. Masterseal 934 Waterproofing Tape 100mm x 20m. 10. Pre-Owned. RIW Sheetseal GR was then used extensively over the footprint of. Cementfill HB incorporates the most advanced cement chemistry, microsilica, fibre and styrene acrylic copolymer technology, resulting in a rapid hardening, low density, high strength waterproofing mortar with enhanced polymer properties. A ‘needle-punch’ process interlocks the geotextiles together through the bentonite, forming an extremely strong composite that maintains a consistent layer of bentonite. As a structural waterproofing provider, a lot of the applications we work on are 'below ground' so with this in mind we encouraged architects to get creative and enter our competition to. • Suitable for leaks in radiators and hoses. RIW Sheetseal 226 300mm x 19. Along with soil types and water table levels, ground contaminates and gases such as Radon & Methane must be considered when deciding upon a waterproofing design. It will take under 30 minutes, and we'll send you a certificate upon completion. For more information about our DPC and cavity tray. We recently held a series of conferences on the theme of subterranean architecture, in partnership with Architecture Today. VAT)Sheet. BENEFITS Pre-applied tanking systems Suitable for. VAT) Enquire Now. Sheetseal Sheetseal is a cold applied, self adhesive bitumen sheet waterproofing membrane. One such example is Llandough Hospital. Double Drain can also be used to provide excellent. Landscape walls are much less critical but often require a retaining wall waterproofing membrane to prevent dampness from the ground spoiling the aesthetic nature of the design, with weep holes being incorporated. Protection Board - a 3mm rot proof bitumen board to prevent damage to the waterproof membrane. RIW Sheetseal 226 - Waterproof Membrane. RIW Sheetseal 226 19. Search. RIW Sheetseal 226 is available in 300mm wide rolls to assist in carrying out angles and projections. Sheetseal 226 Waterproofing Membrane. button Sealing Compound / Granules Applying Damp Proof Membranes. Seamless and fully bonded. RIW Sheetseal 9000 DPC - High Performance Damp-proof Course . RIW Sheetseal 226 RC slab and underslab to SE detail Perimeter edge strip insulation to screed to manufacturer's detail +/- 25mm lean mix backfill for tolerance Loadbearing insulating course eg. The lap should be enhanced, by the inclusion of a 50 x 5mm bead of Sealing Compound. £290. BENEFITS l Water and water vapour barrier l Radon barrier l Elastic and. Contact Us. DPM Blue is a three-layer loose laid, low-density polyethylene gas barrier. 7kg/m2 226 1. The installed product protects the structure against moisture and radon from the ground. RIW Sheetseal 226 is available in 300mm wide rolls to assist in carrying out angles and projections. RIW FLEXISEAL 500 HG system is poured onto the substrate and spread using a trowel and / or brush. When designing Type A structures (as classified in UK BS8102:2009), the product applied. It is typically used as a basement tanking system, or damp-proof ground floors. waterproofing membrane. This also. Easy to use: Cementseal is used to install and joint the tape enabling rapid application. The coating is a solution of natural and petroleum bitumens in white spirit. 64 (Ex. RIW Third party certifications: BBA Agrément Certificate . 1. Sheetseal Primer is a bitumen solution. BIM objects. £35. Flexiseal Pro is a two-pack solvent free polymer modified epoxide coating which cures to give a continuous tough but flexible waterproof coating. DPM Blue. doc. Please search for stockists below. 7 1. rbs Double Sided Adhesive Tape 150mm x 15m. The coating is a fibre and mineral filled solution of natural and petroleum bitumens in white spirit. Rated Excellent. ll waterproofing details shown herein must receie approal from the design team or appointed designer before. NBS Events and webinars ; Corporate information. Description. Easy to install to most substrates. 10. $1,500. Sheetseal 226 is a cold applied, high density polyethylene film, coated with a bitumen/rubber self-adhesive layer with a removable reinforced silicone paper. TYPICAL USES. Features & Benefits of FWM. Sheetseal 226 - a self-adhesive, flexible sheet membrane for reinforcing areas subject to movement. Product sheet 1 Publication Year 2014 Document Status Latest version of document. Solvent Free. Structureseal GPT is a 1. BENEFITS l Water and water vapour barrier l Factory controlled thickness l Elastic and flexibleWeepholes DPC Cavity Drain Overtape Sheetseal 9000 DPC / Cavity Tray Sheetseal 226 lapped over DPC Sub – Soil Drainage 11 | P a g e 7. txt) or view presentation slides online. The lap should be enhanced, by the inclusion of a 50 x 5mm bead of RIW Sealing Compound. 05m. lapped onto Sheetseal 226. Single wound membrane with zero creases. nbs. Size: 300mm x 20m roll. Generally, waterproof membranes are installed horizontally onto a concrete blinding layer and vertically onto reinforced concrete or Sheetseal 226 is a cold applied, high density polyethylene film, coated with a bitumen/rubber self-adhesive layer with a removable reinforced silicone paper. faced with cement based boards. 7kg/m2 226 1. The membrane must always be covered. Download data sheets Search products by application Download typical details Find your local stockist Take one of our online CPD’s. 5mm th including 12. 5mm thick, unique blended polyethylene membrane with a bonded geotextile for pre-applied waterproofing applications, where ground gas or VOC protection is also required. SHEETSEAL 226 SHEETSEAL GR SHEETSEAL 9000 DPC HEVISEAL TOUGHSEAL CEMENTSEAL CEMENTFLEX EXTERNAL TANKING External tanking is the application of a waterproof membrane to the outside of a basement or sub-structure. RIW Sheetseal 226 Primer 5L is a cold-applied, high-density polyethylene film that is coated with a bitumen/rubber self-adhesive layer with a removable reinforced silicone paper. Sheetseal GR is a cold applied, high density polyethylene film, bonded to aluminium foil and coated with a bitumen/rubber self-adhesive layer with a removable reinforced silicone release paper. Unit 1, Venture Road, Lawn Farm Business Park, Woolpit, Suffolk, IP30 9RZ; Tel: 01359 272569; Order hotline: 0844 800 2464;Both RIW Toughseal and RIW Sheetseal 226 were used to continue the waterproofing to the required level above ground. Self-adhesive, damp-proofing and waterproofing membrane. View. 10. Coverage: 5-7m/ltr. STOT RE 1: H372 - Causes damage to organs through prolonged or repeated exposure . button. Factory controlled thickness. Sheetseal 226 is typically used to. VAT) £201. Damage easily repaired. Technical Hotline 01753 944200. td-cav-107. Description:Preformed Pipe gasket - alkali-resistant rubber tape with textile backing/edges used within Mapei waterproofing system . Sheetseal 226 / 226 S is a cold applied, high density polyethylene film, coated with a bitumen/rubber self adhesive layer with a removable reinforced silicone. See Detail 5. 97 (inc. The nominal characteristics for the product are given in Table 1. 05m x 19. 12. Sheetseal 226 is a cold applied, high density polyethylene film, coated with a bitumen/rubber self-adhesive layer with a removable reinforced silicone paper. Proofex L Section 10m. 32 (Ex. The primer should be applied, where required, by brush, roller or spray at a coverage of approximately 7m2/litre. The product is for low-risk applications only and is capable of resisting a hydrostatic head up to 1m. How to Specify. Rated Excellent. All water ingress completely stopped and the internal environment was ready for finishing trades and, of course, wine. 02m. Proofex LM Mesh 100mm x 50m. All water ingress completely stopped and the internal environment was ready for finishing trades and, of course, wine. Proofex Hydromat 2. The lap should be enhanced, by the inclusion of a 50 x 5mm bead of Sealing Compound. Enquire Now View. Sheetseal 226 is a cold applied, high density polyethylene film, coated with a bitumen/rubber self-adhesive layer with a removable reinforced silicone paper. pdf. Protects concrete and reinforcement from harsh. Around the varying perimeters a mixture of RIW Flexiseal and RIW Toughseal were used to complete the waterproofing to DPC and threshold details. 3: H226 - Flammable liquid and vapour. 1. Title: RIW-TD-155 Created Date: 9/19/2019 11:21:52 AM. RIW Sheetseal 226, width 150 mm. Solvent free. RIW Protection Board is a flat sheet, made of organic fibres saturated with bitumen. High drainage capacity. Structureseal NBS Clause. RIW Sheetseal 226 accommodated the differing movement capabilities of a combination of modern building. Date Description Client HADFRAME Project Title. co. DPM Blue is a three-layer, low density polyethylene damp proof membrane with a polypropylene reinforcing grid. DPM’s can be applied to either a suitable blinding layer under the slab or internally to the top of the slab. Consideration should be given to applying the DPM to the top of the slab, as the installation and moisture sensitive internal finishes are then protected from any residual moisture in the concrete. The 3mm thick bitumen board helps to protect the membrane from. It is a self-adhesive film with a removable silicone paper, and. 51 (Ex. co. Conditions to avoid Avoid sparks, flames, heat and sources of ignition. Data Sheet. DPM Blue. POA. Since Resapol was formed in 1999 both national and independent builders merchants have become key customers. Sealing Compound is a trowel-grade sodium bentonite/butyl-rubber based sealant, designed for use with Structureseal. Sheetseal Reinforcing Strip. RIW Sheetseal 226 is a cold applied, high density polyethylene film (HDPE Sheeting), coated with a bitumen/rubber self adhesive layer with a removable reinforced silicone paper. In addition,. 5. Key factors assessed were resistance to water and water vapour. Product Details. It is used on all vertical or inclined surfaces to aid the adhesion of the RIW Sheetseal 226. Document details. Structural Waterproofing > RIW Waterproofing > RIW Sheetseal 226 . Protection Board - a 3mm rot proof bitumen board to prevent damage to the waterproof membrane. The applied membrane must be protected from the. The product generally requires a primer for vertical or sloping surfaces ie: Sheetseal Primer. Sheet. Double Drain can be used in conjunction with a primary waterproofing system, or on its own, to isolate the structure from the surrounding soil. Superior Performance. Sheetseal 226, over the termination point, a minimum of 150mm. Protection Board - a 3mm rot proof bitumen board to prevent damage to the waterproof membrane. 226 sheetseal primer to back of sheetseal 226 land drain Kingspan K18 72. Service entries : Apply a starred patch around all pipe and service entries followed by a band of membrane to cover the points of the star, as illustrated in Detail 8. Can be applied to wet substrates. e. Membrane. FWM Tape 75mm x 10m ( FWM T-10 ) Description:blackburn project case study blackburn central high school nicholas hare architects balfour beatty nicholas hare asked riw to look at robust waterproofingRIW recommended RIW Sheetseal 226 self adhesive sheet membrane, selected for its ability to bridge numerous interfaces in the construction including steel, concrete and a lightweight metsec frame faced with cement based boards. required for the British Museum. 2. length. Verified over a year ago . Reverse phone lookup for finding someone quickly. We aim to offer complete waterproofing assurance to Architects, Engineers and Contractors. RIW, Arc House, Terrace Road South, Binfield, Berkshire G42 4PZ Call Technical: 01753 944200, Call Sales: 01753 944210. RIW Sheetseal 226; top edge must be adequately supported 150mm min. 54 (inc. 58 (inc. £241. Flexiseal should then be lapped over the Sheetseal 226, and be continued up to dpc, as. 05 roll weight (kg) 34. 5 x 15m. 60 £33. 00 (Ex. General: Application of Sheetseal GR and Sheetseal Primer should not be attempted in temperatures below 5°C. Abrasion and impact resistant. The initial application of the Cavity Drain and commissioning of the Sumps and Pumps early in the construction programme meant that the basement was kept dry during the remaining construction programme. It is developed and marketed by EPI Environmental Products Inc. Protection Board - a 3mm rot proof bitumen board to prevent damage to the waterproof membrane. Heviseal. 10066926. co. Size: 300mm x 20m roll. Sheetseal 226 Sheetseal 226 continued up to DPC / Cavity tray level and tucked into bed joint Sheetseal 9000 DPC / cavity tray Detail 3 - Ground Floor Detail 2 - Internal Tanking Detail 4 - External Continuity detail Cementfill HB Fill et Sheetseal Primer Sheetseal 226 Sheetseal 226 reinforcing strip x 300 wide 40mm mortar fill Masonr y. Specification Guide 2014 Pre-applied Tanking System. Quick and suitable for horizontal, vertical and overhead applications. Sheetseal 226 is a cold applied high density polyethylene film coated with a bitumen/rubber self-adhesive layer with a removable reinforced silicone paper. Head Office. Sheetseal 226 on cement particle board or similar RIW Adhesive Tape Sheetseal 9000 DPC / Cavity tray fixed through Sheetseal 226 Detail 3 - Ground Floor DPM Toughseal stripe coat 300 wide Toughseal first full coat Toughseal second coat, up to tape, blinded with Grade 1 Aggregate Toughseal reinforcing tape Detail 2 -Tile Bedding/Render Key. RIW 124783 Sheetseal 226 Tanking 1. Wykamol Rope 10mm x 5m. View. Pre-Applied: Apply Structureseal to timber formwork,Sheetseal Type Thickness (mm) Roll Size Weight (kg/m2) 226 226 226 1. Technical number: Sales number: 01753 944210. 05m 1. Easy application. BIM object . SHEETSEAL 226 SHEETSEAL GR SHEETSEAL 9000 DPC HEVISEAL TOUGHSEAL CEMENTSEAL CEMENTFLEX EXTERNAL TANKING External tanking is the application of a waterproof membrane to the outside of a basement or sub-structure. £74. It was essential that the construction programme on such a large project was kept to time, so careful consideration was given to the application process of any proposed waterproofing solution. , The products must be installed in accordance with RIW written instructions, and following installation must not be. RIW products are non-returnable due to shelf-life and quality control. DPM Blue. The product generally requires a primer for vertical or sloping surfaces, ie: Sheetseal Primer. RIW Sheetseal 226 is a cold applied, high-density polyethylene film (HDPE sheeting), coated with a bitumen/rubber self-adhesive layer with a removable reinforced silicone paper. View. LAC ® can also be used on the superstructure, as a vapour barrier behind cladding systems / plaster finishes. PAK Adhesive 5ltr. View Select options. Sheetseal 226 - a self-adhesive, flexible sheet membrane for reinforcing areas subject to movement. 64. Sheetseal 226 on cement particle board or similar RIW Adhesive Tape Sheetseal 9000 DPC / Cavity tray fixed through Sheetseal 226 Detail 3 - Ground Floor DPM Toughseal stripe coat 300 wide Toughseal first full coat Toughseal second coat, up to tape, blinded with Grade 1 Aggregate Toughseal reinforcing tapeCCL installed RIW Sealing Compound around pile heads, and RIW Sheetseal 226 self-adhesive membrane to the transition between Structureseal and LAC, as reinforcement to the wall/floor junctions. POA. A “needle-punch” process interlocks the geotextiles together forming an extremely strong composite that maintains a consistent layer of Bentonite, as well as protecting it from. Proofex LM Mesh 100mm x 50m. Published on Jan 28, 2013. Compare Bookmark. Sheetseal 226 is typically used as a basement tanking system, or as a ground floor damp proof membrane; particularly where large unobstructed areas are to be waterproofed. RIW Sheetseal 9000 DPC Jointing Tape 15m. Your product has been successfully added to your basket. VAT) £256. RIW Sheetseal 226 is a cold applied, high density polyethylene film (HDPE Sheeting), coated with a bitumen/rubber self adhesive layer with a removable reinforced silicone paper. Must be used with Sheetseal Primer Size: 1. You can easily cut it using a craft knife and it's tough yet flexible. Home / Plant Room. rbs Tanking Membrane GR protects the structure against methane, carbon dioxide and radon from the ground. £12. The company is almost 100 years old and RIW stands for Remember It's Waterproof, which was the slogan of an advertisement for the company in 1921. Sheetseal 226 - a self-adhesive, flexible sheet membrane for reinforcing areas subject to movement. STOT SE 3: H336 - May cause drowsiness or dizziness. The product is designed to relieve hydrostatic pressure, by promoting the flow of ground water away from the face of the structure to land drainage. F rodirroC leveL. RIW Sheetseal 226; 300mm reinforcing strip over LAC RIW Sheetseal 9000 Cavity Tray Provide ventilation to sub-floor void as required Provide weepholes as required, 40mm minimum. Sheetseal 226 is a cold applied, high density polyethylene film, coated with a bitumen/rubber self-adhesive layer with a removable reinforced silicone paper. Apply one coat of the primer onto the desired surface (vertical or inclined surfaces only). 05m roll (20m) Sheetseal Primer. Resists up to 100m head of positive and negative water pressure. Get maps, direction search, area or postal codes or even perform a. 05m. Free local pickup. BENEFITS Water and water vapour barrier Factory controlled thickness Elastic and flexible No drying timeFeatures & Benefits of Cementseal. 5mm plasterboard + scim on dabs Ground Floor Level Basement level All tanking product supplied by RIW Arc House Terrace Road South Binfield Technical Enquiries Tel 01344 397777 . Sheetseal 226 NBS Clause. 1. width. Self-seals hairline cracks up to 0. 3. RIW Sheetseal Primer is a priming solution made from bitumen. RIW Sheetseal primer is a bitumen solution. By Martin Radford, Business Manager at RIW Ltd. RIW are a leading waterproofing and damp proofing product supplier. Excellent chemical resistance. RIW Sheetseal 226 is a cold applied, high density polyethylene film, coated with a bitumen/rubber self adhesive layer with a removable reinforced silicone paper. Abrasion and impact resistant. We provide competitive discounts for bulk orders. POA. Overview. Sheet. Reverse Phone Lookup. RIW Waterstop Data Sheet. It requires Sheetseal 226 Primer for vertical or sloping surfaces. Sheetseal 226 on cement particle board or similar RIW Adhesive Tape Sheetseal 9000 DPC / Cavity tray fixed through Sheetseal 226 Detail 3 - Ground Floor DPM Toughseal stripe coat 300 wide Toughseal first full coat Toughseal second coat, up to tape, blinded with Grade 1 Aggregate Toughseal reinforcing tapeSheetseal 226 may be used to ‘seal’ the edges if required, please consult Technical Department for further information. Add to basket. 05m. Structureseal is a highly effective waterproofing composite, of high strength green coloured geotextile, and sodium bentonite. For added long-term protection of the. Double Drain - a drainage board which protects the membrane during backfilling operations and also promotes drainage of water away from the structure. Safety Datasheet. Sheetseal 226 is typically used to provide a water and water vapour barrier in all forms of construction, particularly where large unobstructed areas are to be treated. Specification Guide: RIW WATERPROOFING SYSTEMS May 2014 4 l Specification Guide to RIW Waterproofing Systems Technical Expertise How to Specify Waterproofing RIW has been…RIW in the UK has over 90 years experience in structural waterproofing. Proofex Protection Board 3mm x 2m x 1m. 05m 300mm x 20m 150mm x 20m 1. VAT) £224. Phone Number e. LAC ® is typically used on structures below ground level, and as a damp proof membrane to ground floors. View. Wykamol Rope 10mm x 5m. Membrane. 05m. BENEFITS l Water and water vapour barrier l Radon barrier l Elastic and flexible l Easily applied and. Cementseal RIW. IW Sheetseal IW leiseal System TMITI T I W IT Section pstand of reinforced concrete, blocks, or brickwork. View. 72 (inc. RIW LIQUID ASPHALTIC COMPOSITION (LAC) Liquid Asphaltic Composition is a two coat, cold applied damp proof membrane, which dries to a uniform gloss black finish. Proofex Protection Board 3mm x 2m x 1m. 150mm min. V. The lap should be enhanced, by the inclusion of a 50 x 5mm bead of Sealing Compound. RIW Sheetseal Primer is a bitumen solution used on all vertical or inclined surfaces to aid adhesion of the RIW Sheetseal 226. 290mm. Find any persons across Canada on Canada 411 thanks to Canada411. View. 2. Sheetseal 226 - a self-adhesive, flexible sheet membrane for reinforcing areas subject to movement. All you need to do is answer a few basic application questions and we'll do the rest. RIW Sheetseal 226 is a polyethylene film with bitumen / rubber adhesive and silicone paper, used to prevent water and water vapour penetration in construction. specification guide section 1 liquid applied systems flexiseal heviseal lac toughseal liquid gm fwm section 2 sheet applied systems sheetseal 226 sheetseal gr tilesafe screedsafe section 3 sodium bentonite systems structureseal waterstop sealing compound & granules section 4 cement based systems cementseal cementflex cementfill fc, cementfill hb & cementfill wp cementjoint & repel ac section. Applying Damp Proof Membranes. uk. Customer Sales 01753 944210. British Standard BS 8102, the Code of Practice for waterproofing of below ground structures has recently been updated to reflect new practices and materials, provide increased clarity and ensure higher quality waterproofing designs and installations. Double Drain - a drainage board which protects the membrane during backfilling operations and also promotes drainage of water away from the structure. Request Callback; 01753 944200. DPM Blue is a three-layer, low density polyethylene damp proof membrane with a polypropylene reinforcing grid. POA. U. RIW Sheetseal 226 150mm x 19. Conditions to avoid Avoid sparks, flames, heat and sources of ignition. The product is unsuitable for use in areas of continuous immersion, such as swimming pools. required for the British Museum. 31 (Ex. POA. • Where these pass through sheeting, make junctions completely impervious using RIW Sheetseal 226 or similar approved in accordance with the data sheet for the product. RIW products are stocked by specialist distributors such as SIG, Resapol, Anchor Bay and Miers Construction who deliver. RIW Sheetseal 226 is a self-adhesive sheet membrane, available in 150 mm wide roll form, for sealing over laps and joints in the boards as required. It can be applied in one coat to horizontal areas and in two coats on vertical substrates, speeding up installation programs on fast track construction sites. The product generally requires a. Enquire Now. Sheetseal 226 - a self-adhesive, flexible sheet membrane for reinforcing areas subject to movement. Lift Pit Waterproofing & Tanking - RIW. Possibility of hazardous reactions No specific material or group of materials is likely to react with the product to produce a hazardous situation. Size: 5L RIW products are non-returnable due to shelf-life and quality control. Home / Technical downloads / Safety Data Sheets. Applied to damp surfaces. All concrete and. 4 Waterproofing of Basements and other Below Ground Structures is having an interesting impact on structural waterproofing as a discipline, which I feel is worthy of discussion. November 2013. Choose between our online CPD below, which focuses on Waterproofing At or Below Ground Level (BS8102:2009) or contact us to book an in-house session. The primer should be applied, where required, by brush, roller or spray at a coverage of approximately 7m2/litre. The system used for this particular project was the RIW Sheetseal 226 waterproofing system. P. 1. 6Below the concrete slab we recommended RIW Sheetseal 226. Sheetseal 226 - a self-adhesive, flexible sheet membrane for reinforcing areas subject to movement. Double Drain is a cold applied, high density polyethylene profiled sheet, incorporating a permeable geotextile filter fabric, designed to prevent ground water reaching the structure. £1592.