Verified by manufacturer 5 months ago . Call for Price. POA. THE CHALLENGE THE SOLUTION Following the demolition of a previous dwelling, a new luxury house with underground basement containing a plant. RIW work closely with a nationwide network of Specialist Waterproofing Contractors, who are experienced installers of our structural waterproofing systems. Pre-applied Tanking System A ‘needle-punch’ process interlocks the geotextiles together through the bentonite, forming an extremely strong composite that maintains a consistent. the Structureseal membrane onto cast concrete), and around membrane penetration details, etc. RIW STRUCTURESEAL Structureseal is a highly effective waterproofing composite, of high strength green coloured geotextile, and sodium bentonite. A selection of Technical PDF documents for a range of RIW waterproofing products. , The products must be installed in accordance with RIW written instructions, and following installation must not be subjected to any damage. For added long-term protection of the outboard reinforcing steel, apply Krystol Waterstop Treatment to the concrete surface first and then adhere Krytonite to the treatment. Waterproofing above ground level;Match case Limit results 1 per page. Technical number: 01753 944200. net Lodge Farm Hook Road North Warnborough Hook Hampshire…The Code of Practice for waterproofing of below ground structures, also known as the British Standard BS 8102, has undergone updates. Read RIW British Museum by Ceren Balkanay on Issuu and browse thousands of other publications on our platform. Sales number: 01753 944210. Complete water and water vapour barrier. All applications. The Technical PDFs are also available for download. Pre-applied, Type A tanking, gas and hydrocarbon membrane. RIW . RIW Gas Seal Pipe Collar: Pre-fabricated ‘top-hats' for sealing around pipe penetrations. 1. All applications. View. The Technical PDFs are also available for download. About Us;. Technical number: 01753 944200. RIW STRUCTURESEAL Structureseal is a highly effective waterproofing composite, of high strength green coloured geotextile, and sodium bentonite. The Technical PDFs are also available for download. RIW Structureseal. At 20°C, Toughseal will require 6 hours minimum before overcoating. RIW has a broad range of high performance structural waterproofing products. Structureseal contains zero VOC’s (Volatile Organic Compounds) and can be installed in almost any weather condition. Structural Waterproofing, Basement Tanking & Damp Proof Membranes. Structureseal GPT is a 1. CI/SfB Tt4. Sheetseal Primer: 5 and 25 litre containers STORAGE Sheetseal 226: There are no special requirements,RIW STRUCTURESEAL TYPICAL USES The high swelling sodium bentonite is encapsulated between a non-woven and woven geotextile. Toughseal. BENEFITS l Pre-applied tanking systems l Suitable for wet weather and low temperature applications l Quick and easy to apply l Does not require additional drainage or protection RIW has a broad range of high performance structural waterproofing products. About Us; Products + Browse by application. Technical number: 01753 944200. net Lodge Farm Hook Road North Warnborough Hook Hampshire…RIW Preformed Pipe Collars: Pre-fabricated ‘top-hats' for sealing around pipe penetrations. Typical applications, include backfilled concrete walls, structural. Sales number: 01753 944210. uk;Granules Granules are chemically treated sodium bentonite granules, which are used as a detailing accessory product, with the RIW Structureseal system. Description Pre-applied, Type A tanking membrane, suitable for use where protection against the ingress of hazardous ground gases, volatile organic compounds (VOCs) and. Download data sheets Search products by application Download typical details Find your local stockist Take one of our online CPD’s. co. RIW Structureseal GPT NBS Clause 145. 21W/M² 1. The Technical PDFs are also available for download. All applications. Liquid plastic roofing system broucherrbs Double Sided Adhesive Tape 100mm x 15m. Sales number: 01753 944210. DPM’s can be applied to either a suitable blinding layer under the slab or internally to the top of the slab. A ‘needle-punch’ process, interlocks the geotextiles4 l Specification Guide to RIW Waterproofing Systems Technical Expertise How to Specify Waterproofing RIW has been a generic term for waterproofing products for over. Download data sheets Search products by application Download typical details Find your local stockist Take one of our online CPD’s. RIW Structureseal is a product of Encon Construction Products, a leading manufacturer of waterproofing membranes, tapes and primers. Specification Guide 2014 RIW Structureseal is a high performance waterproofing membrane that consists of sodium bentonite clay sandwiched between two layers of geotextile. uk. The waterproofing solution also had to become integral with concrete cast against it, so RIW recommended Structureseal; a 6mm thick sodium bentonite composite membrane ideally suited for fixing to irregular concrete piles and laying on blinding or a void former. Double Drain can be used in conjunction with a primary waterproofing system, or on its own, to isolate the structure from the surrounding soil. co. Technical number: 01753 944200. Read RIW British Museum by Ceren Balkanay on Issuu and browse thousands of other publications on our platform. A range of bentonite-based waterproofing products, comprising highly effective waterproofing geo-composite membranes and compounds, designed to prevent the passage of water and water vapour. Sales number: 01753 944210. RIW Structureseal is a bentonite sheet water- proofing composite of high swelling Sodium Bentonite encapsulated between a non-wo- ven and woven geotextile. The Technical PDFs are also available for download. Single wound membrane with zero creases. Waterproofing above ground level;A selection of Technical PDF documents for a range of RIW waterproofing products. Sheetseal 226 Size - 1. The Technical PDFs are also available for download. Sales number: 01753 944210. Waterproofing above ground level;A selection of Technical PDF documents for a range of RIW waterproofing products. Download data sheets Search products by application Download typical details Find your local stockist Take one of our online CPD’s. RIW STRUCTURESEAL GPT Structureseal GPT is a 1. Structureseal; Waterstop; Structural Drainage Systems. piles, prior to the application of RIW Cementseal coating. co. Address. Detail 1 - External Drainage Detail 2 - Top of Wall Double Drain Sub-soil drainage as required See DETAIL 3 RIW Membrane Sheetseal 9000 Cavity Tray Top Edging Strip See DETAIL 2 Double Drain. About Us; Products + Browse by application. Technical number: 01753 944200. Sikadur Combiflex SG 2mm x 20cm x 25m. A selection of Technical PDF documents for a range of RIW waterproofing products. Sales number: 01753 944210. -- Choose an option -- Waterproofing above ground level Waterproofing at ground level Waterproofing below ground level Gas proofing. Structureseal is a bentonite clay sheet waterproofing composite, comprising high swelling sodium bentonite encapsulated between a non-woven and woven geotextile. co. BENEFITS l Pre-applied tanking systems l Suitable for wet weather and low temperature applications l Quick and easy to apply l Does not require additional drainage or protection Structureseal is a bentonite clay sheet waterproofing composite, comprising high swelling sodium bentonite encapsulated between a non-woven and woven geotextile. Proofex Engage 1. Waterstop is a sodium bentonite based hydrophilic type waterstop, designed to stop water infiltration through insitu concrete construction joints. Learn more about its features, benefits and installation methods in this PDF document. 05M x 19. Technical number: 01753 944200. All waterproofing details shown herein must receive approval from the design team or appointed designer. Read Expanded Portfolio by Eliza de Silva on Issuu and browse thousands of other publications on our platform. The system formsswelling action of RIW Structureseal can self-seal small concrete cracks caused by ground settlement and concrete shrinkage. Technical number: 01753 944200. A needle-punch process interlocks the geotextiles together forming an extremely strong composite. It is designed to provide a durable and flexible seal for concrete structures. uk. Technical number: 01753 944200. RIW Cementseal is a cement-based, polymer-modified, two-component, coating that acts as a waterproofing agent. Download data sheets Search products by application Download typical details Find your local stockist Take one of our online CPD’s. LAC ® can also be used on the superstructure, as a vapour barrier behind cladding systems / plaster finishes. Positron emission tomography (PET) imaging is a procedure that, when combined with computed tomography (CT), help physicians to more accurately diagnose and manage. £23. To be primed with RIW Sheetseal Primer. Waterproofing above ground level;Specification Guide: RIW WATERPROOFING SYSTEMS; of 31 /31. RIW has over 90 years experience in structural waterproofing within the UK. RIW has a broad range of high performance structural waterproofing products. The product generally requires a primer for vertical or sloping surfaces, ie. Download data sheets Search products by application Download typical details Find your local stockist Take one of our online CPD’s. Waterproofing above ground level;RIW in the UK has over 90 years experience in structural waterproofing. VAT) Add to basket. Waterproofing above ground level;Waterproofing By Application | Find The Right Product | RIW. All applications. 0 downloadA selection of Technical PDF documents for a range of RIW waterproofing products. Learn more about its benefits, applications and installation in this data sheet. About Us; Products + Browse by application. When designing Type A structures (as classified in BS8102:2009), the product applied correctly, is capable of providing the. Structureseal is a pre-applied tanking system. A selection of Technical PDF documents for a range of RIW waterproofing products. VAT) Enquire Now. RIW has a broad range of high performance structural waterproofing products. RIW Structureseal provided the answer to the first part of . High puncture resistance. Full range of accessories & tailored products. The high swelling sodium bentonite is encapsulated between a non - woven and woven geotextile. Provides efficient sealing of horizontal. Solvent Free. RIW Seal Tape: Double-sided self-adhesive butyl tape, 50 mm wide, for sealing between overlaps in the membrane. It forms a mechanical bond to the external face of the concrete structure and complies with the latest BS8485, BS8102 and CIRIA. Sales number: 01753 944210. This PRS product offers multiple options. As such a SDS is not required but has been prepared due to end user requests. Waterproofing above ground level;A highly effective waterproofing composite, of RIW Structureseal 1. J40/250 RIW Structureseal. Double Drain can be used in conjunction with a primary waterproofing system, or on its own, to isolate the structure from the surrounding soil. Technical number: 01753 944200. RIW Washers as required, to suit background. Structureseal is a highly effective waterproofing composite of high strength green coloured geotextile and sodium bentonite. Sales number: 01753 944210. All applications. Tilesafe. Home / Lift Pit. Technical number: 01753 944200. How to Waterproof Lift Pits with RIW Structureseal. RIW Washers as required, to suit background. £29. Play video. RIW Limited 487 / 488 Ipswich Road Slough SL1 4EP. RIW has a broad range of high performance structural waterproofing products. For more information about our DPC and cavity tray. RIW Limited Arc House, Terrace Road South, Binfield, Bracknell, Berkshire RG42 4PZ Technical enquiries tel: 01344 397777 Commercial enquiries tel: 01344 397788. Features and benefits: Pre. Available in 100, 130 and 160 mm diameters. Sales number: 01753 944210. About Us; Products + Browse by application. RIW has a broad range of high performance structural waterproofing products. Technical number: 01753 944200. co. uk Email address of the competent person enquiries@riw. RIW Structureseal is a bentonite sheet water- proofing composite of high swelling Sodium Bentonite encapsulated between a non-wo- ven and woven geotextile. T: +44 (0) 1753 944200 E: technical@riw. provide protection for this basement. About Us; Products + Browse by application. Home / Waterproofing by Application. Product identifier Product name RIW Structureseal GPT 1. 14 DESIGN PRINCIPLES As per BS:8006-2010, Limit state principles are applied to the design of reinforced soil walls. General enquiries: 0345 456 9594. MATERIAL SAFETY DATA SHEET RIW/ 23 Structureseal Page 4 of 4 15. About Us; Products + Browse by application. uk;RIW has a broad range of high performance structural waterproofing products. RIW in the UK has over 90 years experience in structural waterproofing. RIW supply Structureseal GPT that is 1. Kryton. All applications. Sealing not required. Technical number: 01753 944200. VAT) Enquire Now. Address. Specification Guide 2014RIW Structureseal is a high performance waterproofing membrane that consists of sodium bentonite clay sandwiched between two layers of geotextile. 1. RIW SEALING COMPOUND & GRANULES Sealing Compound is a trowel-grade, sodium bentonite/butyl-rubber based sealant, designed for use with the Structureseal system. RIW Gas Seal GR DPC: Gas resistant damp proof course/ cavity tray, 450, 600 or 900 mm wide. Details of the supplier of the safety data sheet Company RIW Limited Address Arc House Terrace Road South Binfield, Bracknell Berkshire RG42 4PZ Web Telephone 01344 397788 Fax 01344 862010 Email enquiries@riw. Sales number: 01753 944210. BENEFITS l Pre-applied tanking system l Hydrocarbon, VOC, methane & carbon dioxide barrierStructureseal is a bentonite clay sheet waterproofing composite, comprising high swelling sodium bentonite encapsulated between a non-woven and woven geotextile. Structureseal GPT. Technical. RIW has a broad range of high performance structural waterproofing products. All applications. Customers may choose to use the HT4000 series and HT6000 of HI-TAK StructureSeal PRS to create a moisture barrier on surfaces like floorboards, and in lavatories and galleys. Waterproofing above ground level;blackburn project case study blackburn central high school nicholas hare architects balfour beatty nicholas hare asked riw to look at robust waterproofingFind the right product for your specific project requirements in a few simple steps with our easy to use product finder. 5mm thick and suitable for use beneath RC concrete structures which extend below ground level. Add to basket. All you need to do is answer a few basic application questions and we'll do the rest. RIW Structureseal GPT NBS Clause 145. All applications. RIW Granules 20kg RIW Sealing Compound 18kg/14. uk W: Additional Info: Date: Project Ref: Scale @ A4: Drawing No: Drawn:Checked: Rev: 18/09/19NTSRADK RIW/TD/101 RIW Double Drain; see Notes 1 & 2 Provide haunching over membrane Sub-soil drainage; see Notes 3 & 4 RIW Structureseal RIW Flexiseal Pro RIW Sheetseal 226. About Us; Products + Browse by application. Krystol Waterstop Treatment™. -Seal together using 50 x 5mm bead of RIW Sealing Compound, in centre of lap. Quick and easy to install. Waterproofing above ground level;A selection of Technical PDF documents for a range of RIW waterproofing products. co. Sales number: 01753 944210. com. Call for Price. Download data sheets Search products by application Download typical details Find your local stockist Take one of our online CPD’s. , The products must be installed in accordance with RIW written instructions, and following installation must not be subjected to any damage. A selection of Technical PDF documents for a range of RIW waterproofing products. About Us;. For termination laps with sheet and/or brush applied membranes, Sealing Compound is generally applied as a 5 x 50mm bead, central in a 150mm lap. Two colour coded coats. installed 5000m² RIW R7 Cavity Drain to all perimeter walls. Play video. RIW 23: RIW Structureseal Further information This product is not a substance nor mixture but is an "Article" as defined by the REACH Regulation. 324. RIW Limited 487 / 488 Ipswich Road Slough SL1 4EP. Granules are chemically treated sodium bentonite granules, which are mixed with water, and used as a detailing accessory product with Structureseal. Waterproofing above ground level;Waterstop Type RIW Waterstop Size 25 x 19mm Supplied as 5m long coils. • 02/S031 Yorkon Building System. The swelling action of RIW Structureseal can self-seal small concrete cracks caused by ground settlement, concrete shrinkage, etc. RIW in the UK has over 90 years experience in structural waterproofing. A ‘needle-punch’ process. These self-sealing qualities ensure that RIW Structureseal, when used in conjunction with RIW Sealing Compound, is easily detailed around complex substrate profiles as shown in the typical pile cap detail shown. It consists of a geotextile layer and sodium bentonite, a clay that swells when wet and forms a seal. Request Callback; 01753 944210; enquiries@riw. RIW has a broad range of high performance structural waterproofing products. A needle-punch process interlocks the geotextiles together forming an extremely strong composite. Structureseal, to be laid under the main basement slab. The Technical PDFs are also available for download. RIW has a broad range of high performance structural waterproofing products. en Change Language. Generally these systems are a range of cold applied liquid waterproofing coatings. RIW Structureseal is a bentonite sheet waterproofing composite of high swelling Sodium Bentonite encapsulated between a non-woven and woven geotextile. co. Details of the supplier of the safety data sheet Company RIW Limited Address Arc House Terrace Road South Binfield, Bracknell Berkshire RG42 4PZ Web Telephone 01344. 4. 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 inclement. RIW FLEXISEAL 500 HG system is poured onto the substrate and spread using a trowel and / or brush. All applications. Structureseal is a pre-applied tanking system that uses sodium bentonite to waterproof basements and other structures. All applications. co. Please contact us by either email at sales@lemon-gs. 5mm thick, unique blended polyethylene membrane with a bonded geotextile for pre-applied waterproofing applications, where ground gas or VOC. Technical number: 01753 944200. MATERIAL SAFETY DATA SHEET RIW/ 23 Structureseal Page 4 of 4 15. About Us; Products + Browse by application. 1 x 5m high strength green coloured geotextile, and RIW Waterstop 19 x 24mm x 5m sodium bentonite. NBS Source is the new home of the NBS National BIM Library - BIM objects and Revit families (free to download). DESCRIPTION RIW Structureseal is a highly effective waterproofing composite, of high strength green coloured geotextile, and sodium bentonite. About Us; Products + Browse by application. This highly durable composite geotextile membrane formed a. Technical number: 01753 944200. It is designed to provide a durable and flexible seal for concrete structures. 5mm thick, unique blended polyethylene membrane with a bonded geotextile for pre-applied waterproofing applications, where ground gas or VOC protection is also required. A ‘needle-punch’ process, interlocks the geotextiles together forming an extremely strong composite that maintains the equal coverage of bentonite, as well as, protecting it from inclement weather and. Granules are chemically treated sodium bentonite granules, which are used as a detailing accessory product, with the Structureseal system. View. A selection of Technical PDF documents for a range of RIW waterproofing products. uk; Sales. STRUCTURESEAL DOUBLE DRAIN GAS/RADON RESISTANT Ground contaminants and gases such as radon, methane and carbon dioxide must be considered when deciding uponStructureseal, to be laid under the main basement slab. RIW supply Structureseal GPT that is 1. 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. Address. Address. RIW Structureseal GPT NBS Clause 145. Request Callback; 01753 944200; technical@riw. Technical number: 01753 944200. Address. 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. Waterproofing above ground level;Structureseal Sub-soil drainage as required Call 01344 397788 or email enquiries@riw. Technical number: 01753 944200. Technical number: 01753 944200 Structureseal is a pre-applied tanking system that uses sodium bentonite to waterproof basements and other structures. RIW Structureseal GPT NBS Clause 145. Forms a mechanical bond to the external face of the concrete structure. Overview. 500m2 of RIW Structureseal, a high swelling sodium. RIW Over tape at Abutment of New Slab WithJ40/270 Blomfield Building (AX16) E05/320 Void former to Engineer's details J40/290 ? J30/250 ? E05/310 M40/200. 3 RIW Waterstop is satisfactory for use as a water bar in reinforced concrete construction joints, on Type B constructions as defined in BS 8102 : 2009. Waterproofing above ground level;The Solution. RIW Structureseal GPT NBS Clause 145. Technical. Waterproofing above ground level;JUNCTIONS WITH STRUCTURESEAL-RIW Sheetseal 226 to be overlapped by 150mm onto the applied RIW Structureseal. All gas membranes to be inspected and verified in accordance with Table 7 of BS8485:2015. Specification Guide for RIW Waterproofing Systems l 31 RIW STRUCTURESEAL TYPICAL USES When designing Type A (barrier) protection as classified in BS8102: 2009, the product correctly applied is capable of providing the levels of protection required for Grade 1, 2 & 3 basements. 1. Features & Benefits: Pre-applied tanking systems; Suitable for wet weather and low temperature applications; Quick and easy to apply; Does not require additional drainage or protection; Primers and adhesives not required Description Pre-applied, Type A tanking membrane, suitable for use where protection against the ingress of hazardous ground gases, volatile organic compounds (VOCs) and hydrocarbons is required. All applications. Typical applications, include backfilled concrete walls, structural slabs and boundary line construction. All applications. RIW CEMENTSEAL Cementseal is a two component, polymer modified, cement based, waterproof coating for concrete and masonry. Technical number: 01753 944200. Request Callback; 01753 944200; technical@riw. - Bonding/ Sealing: RIW Sheetseal 226 x 150mm wide. and up the face of the contiguous basement piles, prior. Pre-applied Tanking System A ‘needle-punch’ process interlocks the geotextiles together through the bentonite, forming an extremely strong composite that maintains a consistent. Sales number: 01753 944210. Waterproofing above ground level;RIW STRUCTURESEAL GPT: RIW/TD/854 INTERNAL CORNER BUILD-UP 1. A bentonite clay sheet waterproofing composite, comprising high swelling sodium bentonite encapsulated between a non-woven and woven geotextile. View. About Us; Products + Browse by application. Technical number: 01753 944200. A bentonite clay sheet waterproofing composite, comprising high swelling sodium bentonite encapsulated between a non-woven and woven geotextile. Technical number: 01753 944200. CAST CONTRACTING. CCL 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. provide protection for this basement. A selection of Technical PDF documents for a range of RIW waterproofing products. Download data sheets Search products by application Download typical details Find your local stockist Take one of our online CPD’s. RIW/TD/855 RIW Structureseal GPT: External Corner Build Up. Pre-applied Tanking System A ‘needle-punch’ process interlocks the geotextiles together through the bentonite, forming an extremely strong composite that maintains a consistent. RIW Lap Tape: Single-sided self-adhesive PVC tape, 100 mm wide, for sealing edges of lapped product. When designing Type A structures (as classified in BS8102:2009), the product applied correctly, is capable of providing the. uk or 01753944200 for further assistance. Pre-applied tanking system. Waterproofing above ground level;RIW in the UK has over 90 years experience in structural waterproofing. 604. RIW Structureseal. About Us; Products + Browse by application. Waterproofing above ground level;Specification Guide: RIW WATERPROOFING SYSTEMS May 2014 4 l Specification Guide to RIW Waterproofing Systems Technical Expertise How to Specify Waterproofing RIW has been…Proofex Protection Board 3mm x 2m x 1m. Sales number: 01753 944210. For termination laps with sheet and/or brush applied membranes, Sealing Compound is generally applied as a 5 x 50mm bead, central in a 150mm lap. RIW Structureseal GPT SECTION 1: Identification of the substance/mixture and of the company/undertaking 1. Fully compatible with RIW waterproofing systems. Technical number: 01753 944200. The high swelling sodium bentonite is encapsulated between a non - woven and woven geotextile. Customer Sales 01753 944210. Home / Sales and stockists / Specialist Waterproofing Contractors. About Us; Products + Browse by application. Product name RIW 23: RIW Structureseal 1. Customer Sales 01753 944210. RIW Structureseal is a waterproofingT: +44 (0) 1753 944200 E: technical@riw. Good tensile strength. Waterproofing above ground level;RIW Structureseal GPT Data Sheet. Access to the sealed Cavity Drain system was also. Applying Damp Proof Membranes. Structureseal GPT is a 1. Sheetseal Primer. Download data sheets Search products by application Download typical details Find your local stockist Take one of our online CPD’s. Visit us at riw. RIW Structureseal is often used to waterproof lift pit; see how straightforward the application can be. As well as supporting Comer Homes, the project contractor, to carry out the installation of RIW systems. Seal together using 50 x 5mm bead of RIW Sealing Compound, in centre of lap. The product generally requires a primer for vertical or sloping surfaces, ie. Request Callback; 01753 944200; technical@riw. RIW Limited 487 / 488 Ipswich Road Slough SL1 4EP. 4. It forms a mechanical bond to the external face of the concrete structure and complies with the latest BS8485, BS8102 and CIRIA C748. The material should be applied in two even coats to give a minimum dry film thickness of 1mm per coat. RIW Structureseal GPT NBS Clause 145. RIW Structureseal. Waterproofing above ground level;A selection of Technical PDF documents for a range of RIW waterproofing products. RIW/TD/855 RIW Structureseal GPT: External Corner Build Up Download data sheets Search products by application Download typical details Find your local stockist Take one of our online CPD’s Address Structureseal is a pre-applied tanking system. When designing Type C structures (as classified in BS8102:2009), the product applied correctly, Cavity Drainage Membrane is capable of providing the levels of protection required for Grades 1, 2 & 3 basements. All applications. Apply remaining RIW Sheetseal 226, as required, WALL TYPE 1- REF WT1 - TYPICAL EXTERNAL WALL TARGET U VALUE 0. About Us; Products + Browse by application. Complies with latest codes of practice as published by CIRIA and BRE. podium deck and perimeter. uk 1. net Lodge Farm Hook Road North Warnborough Hook Hampshire…RIW Preformed Pipe Collars: Pre-fabricated ‘top-hats' for sealing around pipe penetrations.