{"product_id":"cm8-hd-700-radon-barrier-membrane-2-4-x-20m","title":"CM8 HD 700 Radon Barrier Membrane 2.4 x 20m","description":"\u003cdiv class=\"product-description\" style=\"text-align: start;\"\u003e\n\u003ch2\u003eClever Shield CM8 Cavity Drain Membrane – BBA Certified Type C Waterproofing System\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003ca title=\"CM8 Membrane Products\" href=\"https:\/\/clevershieldcoatings.co.uk\/search?type=product\u0026amp;q=cm8+membrane\" style=\"color: rgb(255, 128, 0);\"\u003eAvailable in other variants - View all CM8 Membrane Products\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eClever Shield CM8 Cavity Drain Membrane\u003c\/strong\u003e is a high-performance \u003cstrong\u003eType C drained protection waterproofing membrane\u003c\/strong\u003e designed for use in structural waterproofing systems in accordance with \u003cstrong\u003eBS 8102\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eManufactured from durable high-density polyethylene (HDPE), the membrane forms a drainage cavity between the structure and internal finishes. Groundwater entering the structure is safely managed through \u003cstrong\u003eperimeter drainage channels and sump pump systems\u003c\/strong\u003e, allowing water to be controlled and discharged.\u003c\/p\u003e\n\u003cp\u003eThe system is designed to transform damp or water-affected areas into \u003cstrong\u003edry, habitable environments\u003c\/strong\u003e suitable for basements, cellars and below-ground structures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClever Shield CM8 membranes are BBA certified\u003c\/strong\u003e, providing assurance of quality, durability and performance for professional waterproofing installations.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/clevershieldcoatings.co.uk\/cdn\/shop\/files\/clever-shield-cm8-cavity-drain-membrane-tanking-system-sk.webp\" alt=\"Clever Shield CM8 Cavity Drain Membrane Clever Shield Basement, Basement Construction, building material suppliers,\" style=\"float: none;\" data-original=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0321\/5320\/6920\/files\/clever-shield-cm8-cavity-drain-membrane-tanking-system.webp?v=1765891015\" data-files=\"clever-shield-cm8-cavity-drain-membrane-tanking-system.webp\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNeed specification advice or pallet pricing?\u003c\/strong\u003e\u003cbr\u003e📞 Speak to our waterproofing specialists: \u003ca href=\"tel:01268472358\"\u003e\u003cstrong\u003e01268 472358\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBBA Certified System\u003c\/strong\u003e – Independently certified for structural waterproofing performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBS 8102 Compliant\u003c\/strong\u003e – Suitable for Type C cavity drain waterproofing systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCreates Dry, Usable Spaces\u003c\/strong\u003e – Converts damp basements into habitable areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater \u0026amp; Contaminant Resistant\u003c\/strong\u003e – Prevents water ingress while resisting salts, roots and contaminants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimal Surface Preparation\u003c\/strong\u003e – Installs directly onto uneven masonry or concrete.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Installation\u003c\/strong\u003e – No drying time required before internal finishing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible \u0026amp; Easy to Cut\u003c\/strong\u003e – Easily trimmed around windows, doors and services.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable HDPE Construction\u003c\/strong\u003e – Resistant to high and low temperature conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear Membrane Design\u003c\/strong\u003e – Allows accurate positioning of membrane plugs during installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBasement waterproofing systems\u003c\/li\u003e\n\u003cli\u003eCellar conversions\u003c\/li\u003e\n\u003cli\u003eBelow-ground waterproofing\u003c\/li\u003e\n\u003cli\u003eDamp wall protection\u003c\/li\u003e\n\u003cli\u003eStructural waterproofing projects\u003c\/li\u003e\n\u003cli\u003eRetrofit basement waterproofing\u003c\/li\u003e\n\u003cli\u003eNew build basement construction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eSystem Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe Clever Shield CM8 membrane forms part of a complete \u003cstrong\u003eType C cavity drain waterproofing system\u003c\/strong\u003e and is typically installed with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePerimeter drainage channels\u003c\/li\u003e\n\u003cli\u003eSump chambers and pump systems\u003c\/li\u003e\n\u003cli\u003eMembrane fixing plugs\u003c\/li\u003e\n\u003cli\u003eJoint sealing tape\u003c\/li\u003e\n\u003cli\u003eDry lining or batten wall systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis maintainable system ensures water entering the structure is safely controlled and removed.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eAlternative High Density Membrane\u003c\/h3\u003e\n\u003cp\u003eFor projects requiring enhanced compressive strength or higher durability, consider:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClever Shield CM8 HD700\u003c\/strong\u003e – an ultra high-density cavity drain membrane suitable for demanding structural waterproofing applications.\u003c\/p\u003e\n\u003cp\u003eOur technical team can assist with selecting the correct membrane for your project.\u003c\/p\u003e\n\u003cp\u003e📞 \u003cstrong\u003eTechnical Advice:\u003c\/strong\u003e \u003ca href=\"tel:01268472358\"\u003e01268 472358\u003c\/a\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Documentation\u003c\/h3\u003e\n\u003cp\u003eDownload official documentation for the Clever Shield CM8 membrane system:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch5\u003eBBA\u003c\/h5\u003e\n\u003cp\u003e\u003ca aria-label=\"Visit a webpage about BBA Certification Wykamol CM8 Cavity Drain Membrane 18 5595\" href=\"https:\/\/wykamol.com\/uploads\/files\/BBA-Certification-Wykamol-CM8-Cavity-Drain-Membrane-18-5595.pdf\" title=\"BBA Certification Wykamol CM8 Cavity Drain Membrane 18 5595\"\u003e\u003cspan\u003eBBA Certification Clever Shield CM8 Cavity Drain Membrane 18 5595\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003ePerformance\u003ca class=\"button-with-icon margin-bottom\" href=\"https:\/\/wykamol.com\/uploads\/files\/BBA-Certification-Wykamol-CM8-Cavity-Drain-Membrane-18-5595.pdf\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/h5\u003e\n\u003cp\u003e\u003ca aria-label=\"Visit a webpage about Declaration Of Performance CM8 HD700 Cavity Drain Membrane WPDOP036 2019 08\" href=\"https:\/\/wykamol.com\/uploads\/files\/Declaration-of-Performance-CM8-HD700-Cavity-Drain-Membrane-WPDOP036-2019-08.pdf\" title=\"Declaration Of Performance CM8 HD700 Cavity Drain Membrane WPDOP036 2019 08\"\u003e\u003cspan\u003eDeclaration Of Performance CM8 HD700 Cavity Drain Membrane WPDOP036 2019 08\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca aria-label=\"Visit a webpage about Declaration of performance cm8 ca\" href=\"https:\/\/wykamol.com\/uploads\/files\/Declaration-of-Performance-CM8-HD700-Cavity-Drain-Membrane-WPDOP036-2019-08.pdf\" title=\"Declaration of performance cm8 ca\"\u003eDeclaration Of Performance CM8 Ca\u003c\/a\u003e\u003ca aria-label=\"Visit a webpage about Declaration Of Performance CM8 Cavity Drain Membrane WPDOP03 2019 08\" href=\"https:\/\/wykamol.com\/uploads\/files\/Declaration-of-Performance-CM8-HD700-Cavity-Drain-Membrane-WPDOP036-2019-08.pdf\" title=\"Declaration Of Performance CM8 Cavity Drain Membrane WPDOP03 2019 08\"\u003ev\u003c\/a\u003e\u003ca aria-label=\"Visit a webpage about Ity drain membrane wpdop03 2019 08\" href=\"https:\/\/wykamol.com\/uploads\/files\/Declaration-of-Performance-CM8-HD700-Cavity-Drain-Membrane-WPDOP036-2019-08.pdf\" title=\"Ity drain membrane wpdop03 2019 08\"\u003eity Drain Membrane WPDOP03 2019 08\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch5\u003eTDS\u003c\/h5\u003e\n\u003cp\u003e\u003ca aria-label=\"Visit a webpage about Cm8 Cdm Data Sheet\" class=\"button-with-icon margin-bottom\" href=\"https:\/\/wykamol.com\/uploads\/files\/CM8-CDM-BWM03A-TDS7.pdf\" title=\"CM8 CDM Data Sheet\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e\u003cspan\u003eCM8 CDM Data Sheet\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eThese documents provide full technical specifications, installation guidance and compliance information.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eWhat is a Type C cavity drain waterproofing system?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eA Type C waterproofing system manages water entering a structure by directing it behind a cavity drain membrane into drainage channels and sump pumps for controlled removal.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eIs the Clever Shield CM8 membrane BBA certified?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eYes. Clever Shield CM8 membranes are BBA certified, confirming their suitability for structural waterproofing applications.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eCan the CM8 membrane be installed on damp walls?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eYes. Cavity drain membranes are designed to be installed on damp substrates because the system manages water behind the membrane.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eHow is the membrane fixed to walls?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eThe membrane is mechanically fixed using specialist membrane plugs installed through the membrane into the masonry substrate.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eCan CM8 membranes be used on floors?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eYes. CM8 membranes can be installed on walls and floors as part of a complete basement waterproofing system.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eVideo\u003c\/h5\u003e\n\u003cp\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/h3Kh1Si2gw0\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch5\u003e\u003cbr\u003e\u003c\/h5\u003e\n\u003ch1 style=\"text-align: center;\" class=\"size-small\"\u003e\u003cspan style=\"font-size: 1.4em;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/h1\u003e","brand":"Clever Shield","offers":[{"title":"CM8 HD 700 2.4 x 20m","offer_id":57024767852919,"sku":"CS-CM8HD7002.4X20","price":190.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0321\/5320\/6920\/files\/clever-shield-cm8-cavity-drain-membrane-tanking-system.webp?v=1765891015","url":"https:\/\/clevershieldcoatings.co.uk\/products\/cm8-hd-700-radon-barrier-membrane-2-4-x-20m","provider":"Clever Shield - Asset Protection","version":"1.0","type":"link"}