RIW Structureseal is a bentonite sheet waterproofing composite of high swelling Sodium Bentonite encapsulated between a non-woven and woven geotextile. 12mm x 80mm x 6mt 18mts per box. Cementjoint; MultiJoint; Cement Based Systems. Data Sheet. It has a high flow capacity to alleviate hydrostatic pressure on below ground structures and has a high puncture resistance. Price: £ 29. Sika CD Channel 2m. 00. Price: £ 153. Aquaplugs/Rubber Stoppers / Tie Hole Fillers quantity. Cold applied, cementitious waterproof coating system. Concrete Formwork & Shuttering. 0x20m roll 5 No. rolls Cavity Drain R7 2. Structural Drainage Systems. Wykamol Cavity Drainage Membranes; Triton Cavity Membranes For Wall & Floors; Visqueen Cavity Drain System; RIW Cavity Drain; Sika. 25mm Expansionthene Sheets. 2 boxes 1 No. 1mt x 2mt. 7mt pack. Sales number: 01753 944210. Kryton KIM . 2 boxes--- 6 No. RIW Cavity Drain allowed water to be directed away from internal finishes to a maintainable land drain below the structure. Technical number: 01753 944200. RIW Limited’s waterproofing products will, subject to normal service conditions, provide an effective barrier to the transmission of liquid water and water vapour for the life of the building in which they are incorporated. 5. On high risk sites, such as those with deep basements. Data Sheet. PVC drainage conduit for use with RIW Cavity Drain systems. X-Cramps: Provided there is not a primary membrane on the surface, then Double Drain can be fixed using X-Cramps and nails at 250mm centres along the top edge only (nails not supplied). Specification Guide 2014Description. Sika® BituSeal S-115 is a post applied self-adhesive waterproofing sheet membrane. Cavity Drain R7 is suitable for use on floors and ceilings, please consult RIW for further information/ guidance. Hex Nuts are Used as an alternative to wing nuts when access is. RIW Limited Tel : 01344 397 777 370 A PIPES, DUCTS, CABLES, ETC : - Where these pass through sheeting, make junctions completely impervious, following details as recommended for the purpose by the sheet manufacturer. View. This system retains poured concrete and achieves a significant reduction in the pressure of concrete normally associated with conventional formwork. 05/4232, covering its use on walls and floors above and below ground. Plastic tric Trac Spacer quantity. 00. co. GCP Aerofil 2 Joint Filler quantity. Sales number: 01753 944210. CI/SfB Tn6 L6813 September 2013 RIW CAVITY DRAIN R20 R20 is manufactured from1. Renders & Pointing Mortars. Sub-soil drainage must be capable of discharging water away from the structure. Uses include isolation joints between slab and walls around columns and brickwork expansion joints. 44mt. A full list of data sheets, including liquid applied systems, DPC & Cavity Trays and many more PDFs - available to view online or download. RIW . Masterseal 590 is a fast setting cementitous mortar that stops active water leaks though joints , cracks and holes in concrete masonary. Fixings: Provided there is not a primary membrane on the surface, then Double Drain can be fixed using RIW Plug and nails at 250mm centres along the top edge only (nails not supplied), or self-adhesive pins. BENEFITS l Easy to install l High drainage capacity l High factor of safety l High compressive strength l Chemically resistantDescription. Sales number: 01753 944210. The product cures to form a durable, highly. RIW Cavity Drain allowed water to be directed away from internal finishes to a maintainable land drain below the structure. Basement Waterproofing & Tanking. Description. Non Shrink Grouts / Epoxy Grouts & Chemicals. A selection of Technical PDF documents for a range of RIW waterproofing products. 0x20m roll 5 No. Concrete Formwork & Shuttering. RIW Cavity Drain R20 - HDPE studded membrane . Proofex Cavity Drain Sealing Tape 2mm x 30mm x 20m. Due to this risk, RIW Structureseal was used under the slab, with RIW Cavity Drain R7 providing protection for the walls. Sales number: 01753 944210. Price: £ 78. Technical number: 01753 944200. Data Sheet. 7. A range of dowel bar debonding caps manufactured from rigid PVC tube with polyethylene foam fixed into one end to act as compression filler, which allows for expansion of dowel bars in construction joints. POA . Cavity Drain R20. The RIW Aqua Pump Pro range has been developed specifically for the specification market and are specifically designed for the removal of ground water from a basement when used in conjunction with an RIW Cavity Drain System. Compare. Price: £ 440. Technical number: 01753 944200 Sales number: 01753 944210 Gas/Radon Resistant. RIW has a broad range of high performance structural waterproofing products. Can be used on all types of formwork but particularly suitable for sealed or unsealed plywood. RIW Cementseal - Waterproof Coating System . RIW Sheetseal 9000 DPC - a range of high performance polymeric dpc's, and pre-formed cavity trays, compatible for use with all RIW Limited membranes. £4596. About Us; Products + Browse by application. About Us; Products + Browse by application. Waterproofing above ground level;Combigrid® can be installed during virtually all weather conditions without heavy equipment or special construction techniques. Description. Wykamol Cavity Drainage Membranes; Triton Cavity Membranes For Wall & Floors; Visqueen Cavity Drain System; RIW Cavity Drain; Sika Cavity Drainage System; Concrete Formwork & Shuttering. Designed for use. Applied to damp surfaces. Cavity Drain R20 is a 1mm thick high density polyethylene (HDPE. Price: £ 66. Cavity Drain R7 is suitable for use on floors. It is a cold applied, high density polyethylene film bonded to aluminium foil and coated with a bitumen/rubber self adhesive layer . Specialist Construction Supplies has built up an enviable reputation for outstanding service, product quality and product choice. 2 boxes 1 No. 07x20m roll 5 No. RIW Cavity Drain Overtape 150mmx20m. Formwork Tie Bar System; Formwork Angle Fillet & Void Formers; Formwork Shuttering; Formwork Anchors / Kickers; Formwork Chemicals &. co. Nitoseal MS300 is suitable for sealing saw-cut and movement joints in internal floors, and external joints where abrasion resistance is required. All applications. uk W: Additional Info: Date: Project Ref: Scale @ A4: Drawing No: Drawn:Checked: Rev: 19/09/19NTSRRDK RIW/TD/156 RIW Cavity Drain R20 Insulation / Services zone Floor build-up and insulation zone RIW Cavity Drain R20 RIW. Quantity. 5 to 9mm wide in concrete and masonry, and. Waterproofing above ground level;CI/SfB Tr9 L1415 November 2013 RIW STRUCTURESEAL is a highly effective waterproofing composite, of high strength green coloured geotextile, and sodium bentonite. RIW . adhering RIW Protection Board or Double Drain to the RIW membrane. Cavity Drain R20 and R7 are typically used in basements and sub-structures, to channel wat. Both RIW Toughseal and RIW Sheetseal 226 were used to. RIW Cavity Drain Fixing Plugs 100 per box. RIW Cavity Drain Systems mange water that penetrates the external structure and direct it to a suitable discharge point. Price: £ 54. Bituthene 4000 is a flexible preformed waterproof membrane combining a high performance cross laminated, HDPE carrier film with a unique super sticky self adhesive rubber bitumen compound. uk; Sales. per m2 ie. RIW offer a sump and range of sump pumps, maintainable water management drainage channels, along with control panels and alarms to complement our cavity drainage membranes. Suitable substrates include concrete, masonry, steel, asbestos cement, timber, sprayed polyurethane foams and expanded polystyrene such as ICF systems. Sheet. Description. Plastic Tric Trac Spacer. Water entering a drained cavity system is regulated by the structure, so defects that might result in unacceptable leaks should be. Cavity Drain. RIW LAC can also be used as an effective barrier to. Totally waterproof. 0. Hydrocell XL is a cross linked, non-absorbent, semi-rigid, cellular polyethylene joint filler used for forming expansion joints in concrete, brickwork and blockwork. TYPICAL USES Aqua Channel is used in conjunction with Cavity Drain systems to control water ingress in below ground structures. Description. Description. Price: £ 94. Basement Waterproofing & Tanking. 25mm and 9mm wide in concrete and masonry, where both sides of the crack can be sealed to prevent resin drainage. Visqueen High Performance (HP) Vapour Barrier is used to omit the risk of interstitial condensation within a structure as well as improving the general airtightness of the building. Download BIM. 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. Price: £ 106. Enquire Now. ANCILLARY PRODUCTS RIW produce a range of ancillary products for use with Cavity Drain R7 (see also separate data) which includes: Sealing Rope - a self-adhesive rope for sealing around CAVITY DRAIN R20 Overtape is used at wall/floor, wall/wall and wall to soffit junctions. £153. We aim to offer complete waterproofing assurance to Architects, Engineers and Contractors. rolls In addition to these components, Overtape will be required, as follows: CAVITY DRAIN R20 RIW Cavity Drain meets the standards to achieve a Grade 3 (BS8102:2009) basement as required on this project. Ultrascape Flowpoint is ideal for all pavements where a rigid or bound void-free joint is required. External application was to a retaining wall to the under-croft which was to be used for storage. Featured Products RIW Sheetseal 226 A cold applied, high density polyethylene film, coated with a bitumen/rubber self adhesive layer with a removable reinforced silicone paper. 0 x 20m roll --- --- 5 No. RIW/TD/403 AQUA CHANNEL Typical intermediate floor detail. txt) or view presentation slides online. Other materials are also adhered to the Cavity Drain products using Overtape. When cured, it creates a dense matrix with very high adhesion that is impermeable to water to 10 bar of water pressure to both the positive and negative pressure suides of the structure. RIW Structureseal is a bentonite sheet waterproofing composite of high swelling Sodium Bentonite encapsulated between a non-woven and woven geotextile. The Technical PDFs are also available for download. 07x20m roll 5 No. Waterproofing above ground level;Damp Proof Course & Brickwork Products. All applications. Also available Cast In. RIW/TD/401 AQUA CHANNEL in rebate with masonry lining. If you move a few inches off the wall (As I would suggest with your french drain), you still want to mount the polystyrene to the outside and then use batt insulation between the studs. Secugrid 40/40 geogrids have a long established track record to be ideal for ground reinforcement or stabilisation. Expansion Joint Fillers. 65. RIW . 1mt x 2mt. Cavity Drain R20 and R7 are typically used in basements and sub-structures, to channel water ingress to a sump or collection point for disposal. SBS30W100. 00. 95. RIW Cavity Drain R20 - HDPE studded membrane . Your product has been successfully added to your basket. VAT) Add to basket View. Cavity Drain R20 has been awarded British Board of Agrément Certificate No. Customer Sales 01753 944210. Product. View. Waterproofing above ground level;A full list of data sheets, including liquid applied systems, DPC & Cavity Trays and many more PDFs - available to view online or download. Thruty cones are used at the ends of the thruty sleeve and can be easily extracted after removal of the formwork, to form a chamfered recess for subsequent grouting with Tie Hole Sealer. The grout powder, when mixed with water, produces a material that is cohesive, mobile, self compacting and displays excellent resistance to washout when brought into contact with. Wykamol Cavity Drainage Membranes; Triton Cavity Membranes For Wall & Floors; Visqueen Cavity Drain System; RIW Cavity Drain; Sika. per m2 ie. Structural Drainage Systems. Sales number: 01753 944210. Flexiseal PRO primer is used to seal porous or. 25mm Aerofil 2 Sheets. . RIW CAVITY DRAIN R20 ANCILLARY PRODUCTS RIW produce a range of ancillary products for use with Cavity Drain R20 which include: Sealing Rope - a self-adhesive rope for sealing The systems are designed to control and discharge water entering a structure, in full accordance with BS81902:2009 Type C (drained) protection. 07x20m roll 5 No. Compare this product to another (up to 4 items) Quantity Add to quote. Miothene is supplied in sheets or strip form where the outer edge is undercut to allow for easy removal prior to sealing. Concrete Formwork & Shuttering. Each unit consists of a galvanised steel casing which is dimpled to provide an effective concrete bond. RIW Sheetseal Damp Proof Course; Insulated DPC Damp Proof Course; Gas Resistant Damp Proof Course; Brick Reinforcement; Cavity Closers; Airbricks & Telescopic Vents; Basement Waterproofing & Tanking. Sealing vertical and horizontal construction joints in watertight concrete. 50. 05/4232, covering its use on walls, floors and ceilings above and below ground. Ideal for extensions and repairs to concrete in factories, loading bays, trucking aisles, bridges, roads, bonded. Sales number: 01753 944210. Proofex Angle Fillet. 05/4232, covering its use on walls and floors above and below ground. 30mm ( 100mt ) Price: £ 82. Cavity Drain R20 has been awarded British Board of Agrément Certificate No. co. Price: £ 78. Cavity Drain R20 2. RIW/TD/401 AQUA CHANNEL in rebate with masonry lining. Customer Sales 01753 944210. Home / Waterproofing by Application. Waterproofing above ground level;RIW Sheetseal Damp Proof Course; Insulated DPC Damp Proof Course; Gas Resistant Damp Proof Course; Brick Reinforcement; Cavity Closers; Airbricks & Telescopic Vents; Basement Waterproofing & Tanking. All applications. We pride ourselves on our fast, efficient, delivery service and high levels of customer care. RIW/TD/401 AQUA CHANNEL in rebate with masonry lining. All applications. The RIW range encompasses Type A products through to cavity drain and epoxy coatings. BIM object . SIKA Waterproofing & Concrete Repair Products. 100mt pack. Price: £ 132. The Technical PDFs are also available for download. RIW Cavity Drain Membranes. About Us; Products + Browse by application. uk or contact. DPC & Cavity Trays. uk Specification Guide to RIW Waterproofing Systems l 5. RIW R7 Cavity Drain. 2 boxes 1 No. 1 RIW Cavity Drain R20 is satisfactory for use as a damp-proof membrane on internal faces of walls and floors of all types of existing construction that require a large air gap for a high drainage volume. Compare. Fosroc Nitoseal PU800 is abrasion resistant and withstands spillage. Technical number: 01753 944200. Alderprufe Tuflex geomembranes are used as liners and capping to contain both the gas and liquids produced by a landfill operation. Price: £ 179. Encon Construction Products offers a huge range of construction products & accessories, primarily for use in infrastructure and major building projects. Primer B1 is moisture tolerant and can be. Other materials are also adhered to the Cavity Drain products using Overtape. 07m x 20m - Resapol. All applications. Price: £ 123. The slight tapered shaping stops the void former from adhering to the concrete and therefore allows easy. Joint Sealant & Adhesives. A full list of data sheets, including liquid applied systems, DPC & Cavity Trays and many more PDFs - available to view online or download. Double Drain can also be used to provide excellent. Tokstrip & Longstrip - Joint Sealant for Manhole Chambers quantity. Your product has been successfully added to your basketExpansion Joint Fillers. Cavity Drain. RIW offer a sump and range of sump pumps, maintainable water management drainage channels, along with control panels and alarms to complement our cavity drainage membranes. RIW Structureseal GPT . DPM’s can be applied to either a suitable blinding layer under the slab or internally to the top of the slab. RIW Cavity Drain R20 Data Sheet. 49 (Ex. Cavity Drain R20 & R7 are used as internal cavity drainage membrane systems, to collect water entering the structure. Masterflow 765 is recommended for: Grouting bearing pads and plinths , Grouting under machinery, base plates, stanchion bases and crane rails , Anchoring bolts, reinforcing bars and rods , Underpinning . ProofexLM Liquid Membrane. A cavity drain system is often referred to by Structural Waterproofing Designers as a means of waterproofing protection for underground structures. co. The product is 6mm thick and supplied in rolls 0. RIW Cavity Drain Systems mange water that penetrates the external structure and direct it to a suitable discharge point. pdf. Advantages Suitable for forklift truck traffic , Suitable for saw cut and perimeter joints , Abrasion. ESD01-floor to wall toe with self adhesive. pdf; ESD02-against existing structure. 60 (inc. Brickspan Masonary Reinforcement quantity. Complies with DOT Road and Bridges specification of Highway Works 1991 Part 3 clause 1015. Cementitious Waterplugs. A Drained Cavity within the basement or sub-structure is the provision of a continuous pre-formed cavity, which intercepts and drains away water ingress in accordance with BS8102: 2009 Type C (Drained) protection. Other systems are available for specific uses, refer to Typical Uses inside. Sales number: 01753 944210. Typical uses for Terram standard geotextiles include ground stabilisation (between the sub-base and subgrade) and around drainage materials : Terram filters/separators are used extensively in. RIW Sheetseal 226 Self Adhesive Tanking Membrane. uk Specification Guide to RIW Waterproofing Systems l 5. Wykamol Cavity Drainage Membranes; Triton Cavity Membranes For Wall & Floors; Visqueen Cavity Drain System; RIW Cavity Drain; Sika. pdf. Product code : 82CCDST. rolls In addition to these components, Overtape will be required, as follows: CAVITY DRAIN R20 The RIW name is always linked with quality products and is one of the best known brands in Waterproofing. Provide access points as necessary that nance of channels. RIW provided waterproofing expertise for the refurb and new build of additional student accommodation. About Us; Products + Browse by application. Comax Reinforcement Continuity Systems are designed to maintain continuity of reinforcement at construction joints in concrete. A142 mesh is often used in 100mm thick light-use slabs such as paths, driveways and garage bases, while A252 is normally associated with heavier-duty 150-200mm thick slabs, with A193 used in. RIW/TD/401 AQUA CHANNEL in rebate with masonry lining. VAT) £6488. pdf. Fibreboard / Flexcell quantity. Cementfill FC; Cementfill HB; Cementflex;RIW/TD/305 SHEETSEAL 9000 DPC: Cavity tray fixing to solid inner skin. Wykamol Cavity Drainage Membranes; Triton Cavity Membranes For Wall & Floors; Visqueen Cavity Drain System; RIW Cavity Drain; Sika. A full list of data sheets, including liquid applied systems, DPC & Cavity Trays and many more PDFs - available to view online or download. About Us; Products + Browse by application. Multi functional - acts as a combined protection layer and drainage layer; Range of thicknesses available - provides options for water flow capacity ; Large format rolls - rapid installation ;Sheets & Strips Available. Designed for use with RIW Cavity Drain systems. Our modified epoxy paint RIW Flexiseal Pro was thenA full list of data sheets, including liquid applied systems, DPC & Cavity Trays and many more PDFs - available to view online or download. All applications. Settpoint is self-smoothing, exceptionally strong and contains shrinkage compensating agent. Cavity Drain Cementfill FC Cementfill HB Cementflex Cementjoint Cementseal Double Drain Flexiseal Heviseal LAC Liquid GMRIW Cavity Drain Cavity Drain R20 & R7 are used as internal cavity drainage membrane systems, to collect water entering the structure. For more information about our cavity drainage systems and channel drainage, contact the RIW Technical Department. Cavity Drain R20 and R7 are typically used in basements and sub-structures, to channel water ingress to a sump or collection point for disposal. Reinforcement & Concrete Slab Accessories. Technical number: 01753 944200. Product. POA . 07m wide x 20m long Brick Plugs Box of 100 RIW offer a sump and range of sump pumps, maintainable water management drainage channels, along with control panels and alarms to complement our cavity drainage membranes. Aquaplug Rubber Stoppers 26mm. 50mm Top Crack Inducer. Non Shrink Grouts / Epoxy Grouts & Chemicals. About Us; Products + Browse by application. rolls FLOORS Cavity Drain R20 2. About Us; Products + Browse by application. RIW/TD/403 AQUA CHANNEL Typical intermediate floor detail. About Us; Products + Browse by application. Both RIW Toughseal and RIW Sheetseal 226 were used to. About Us; Products + Browse by application. Jump to: Specification data ; Third party certifications ; Add to spec +44 (0)1753 944200 Website Contact manufacturer Application. Price: £ 154. RIW Sheetseal Damp Proof Course; Insulated DPC Damp Proof Course; Gas Resistant Damp Proof Course; Brick Reinforcement; Cavity Closers; Airbricks & Telescopic Vents; Basement Waterproofing & Tanking. Price: £ 142. Waterproofing above ground level;Newton 8 mm CDM 508 eco Floor Recycled Cavity Drain Floor Membrane - 8 mm Recycled Cavity Drain Membrane . Price: £ 152. 5. RIW Cavity Drain R7 Data Sheet. 0 x 20m roll --- --- 5 No. Verified by manufacturer 6 months ago . Waterproofing above ground level;A full list of data sheets, including liquid applied systems, DPC & Cavity Trays and many more PDFs - available to view online or download. co. Void formers are made from rigid PVC and are used to form grooves in concrete that can easily be fixed by nailing directly onto shuttering. Concrete Formwork & Shuttering. Conclusion RIW was awarded the £400,000 contract to supply all of the integrated. Masterflow 765 is recommended for: Grouting bearing pads and plinths , Grouting under machinery, base plates, stanchion bases and crane rails , Anchoring bolts, reinforcing bars and rods , Underpinning . Wykamol Cavity Drainage Membranes; Triton Cavity Membranes For Wall & Floors; Visqueen Cavity Drain System; RIW Cavity Drain; Sika. Claymaster is a low density compressible expanded polystyrene used to relieve the effects of groundheave. Description. Cementfill HB - Cement based waterproof high build repair mortar for profiling and providing fillets. Double Drain Sub-soil drainage as required See DETAIL 3 RIW Membrane. 20 x 1mt. 2 boxes 1 No. How to Specify. SECTION 150mm min. RIW R7 Cavity Drain 2. Sales number: 01753 944210. RIW Cavity Drain allowed water to be directed away from internal finishes to a maintainable land drain below the structure. The above performance figures are typical values and should not be considered a product specification. RIW CAVITY DRAIN R20 ANCILLARY PRODUCTS RIW produce a range of ancillary products for use with Cavity Drain R20 which includes: Sealing Rope - a self-adhesive rope or Tape for sealingA full list of data sheets, including liquid applied systems, DPC & Cavity Trays and many more PDFs - available to view online or download. Visqueen High Performance Urban Drainage Geomembrane is a robust thermoplastic Geomembrane , black in colour , 1mm thick and supplied in single wound rolls ( not folded) . Added to this we have over 30 years of experience in the construction industry allowing us to offer solutions to a wide. each spacer is capable of holding the steel at two different heights. RIW Limited 487 / 488 Ipswich Road Slough SL1 4EP. Waterproofing above ground level;Sealing Compound / Granules. Verified 7 months ago . VAT) Enquire Now. RIW Cavity Drain is a profiled HDPE sheet cavity former that provides a clear and safe route for water seepage into an existing or new basement. Internal water management system to collect water entering basements and. Quantity. Technical. 97 mt x 25 mt . Fibre board can be used in conjunction with PVC void formers to form sealant void. roll 2 No. pdf. Cavity Drain R20 & R7 are used as internal cavity drainage membrane systems, to collect water. RIW Plaster Drain Data Sheet. Sales number: 01753 944210. Our Masonry Reinforcement aids to reduce cracking within walls and structures, as well as providing general support. Data Sheet. It can be used from fluid to plastic consistencies for the grouting of equipment. As mentioned above, prices can vary considerably due to many important factors. Retaining walls can be external walls forming part of the landscape design, or walls that form part of a property. Concrete Repair Mortars & Floor Levelling Compounds. The Aqua Pump Pro range of sump pumps, and Aqua Channel products, has been developed specifically for the specification market, and are designed to remove. Masterflow 765 is a ready to use non-shrink grout. Jump to: Specification data ; BIM objects <p>An internal peripheral drainage channel manufactured from PVC, designed for the control of water ingress in below ground situations. Data Sheet. Cavity Drain R20 and R7 are typically used in basements and sub-structures, to channel water ingress to a sump or collection point for disposal. Technical Hotline 01753 944200. 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. Cavity Drain; Double Drain;Piled wall RIW Cavity Drain fixed at Notes: 1. A full list of data sheets, including liquid applied systems, DPC & Cavity Trays and many more PDFs - available to view online or download. November 25, 2022. 07m x 20m) £344. Visqueen. Effective barrier to Methane gas, Water and water vapour barrier , Factory controlled thickness ,. RIW only details masonryquestion of potential ground settlement. Waterproofing above ground level;RIW produce a range of ancillary products for use with Cavity Drain R7 which include: Sealing Rope - a self-adhesive rope for sealing around services, fixings etc. A full list of data sheets, including liquid applied systems, DPC & Cavity Trays and many more PDFs - available to view online or download. Cavity Drain R20 & R7 are used as internal cavity drainage membrane systems, to collect water entering the structure. 19 (inc. 7mt pack. Quick and easy to apply by hand or spray. As the substructure was raised, CCL installed 5000m² RIW R7 Cavity Drain to all perimeter walls. Cavity Drain R20 & R7 are used as internal cavity drainage membrane systems, to collect water entering the structure. RIW . RIW Cavity Drain Fixing Plugs 100 per box. SCS Cavity Closers quantity. Description Cavity Drain R20 is used in situations where site conditions or structural design make it difficult or impossible to use traditional tanking methods. To be fixed onto the vertical face of the groundbeams using Claymaster Fixing Pins. 2 Application The membrane is laid out ‘domes down' over the floor for the horizontal portion, with consecutive membrane widths laid out to create an overlap of two interlocking domes. RIW/TD/404 AQUA CHANNEL at bottom of secant piled wall. Polythene DPMs & Vapour Barriers. per m2 ie.