{"product_id":"riw-double-drain-20m-x-2m","title":"RIW Double Drain 20m x 2m","description":"\u003ch2 class=\"PDq2pG_selectionAnchorContainer\" data-end=\"50\" data-start=\"0\" data-section-id=\"1oxkmmw\"\u003eRIW Double Drain Geocomposite Drainage Membrane\u003cspan class=\"PDq2pG_selectionAnchor\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp data-end=\"728\" data-start=\"52\"\u003eRIW Double Drain is a high-performance geocomposite drainage membrane designed to protect below-ground waterproofing systems while efficiently directing groundwater away from the structure. Manufactured from a profiled high-density polyethylene (HDPE) core bonded to a permeable geotextile filter fabric, it creates a durable drainage layer that relieves hydrostatic pressure and safeguards primary waterproofing membranes from damage during backfilling. Suitable for basements, retaining walls, podium decks, reservoirs and other below-ground structures, Double Drain enhances the long-term performance of external waterproofing systems.\u003c\/p\u003e\n\u003cp data-end=\"1251\" data-start=\"730\"\u003eThe profiled HDPE core provides a high-capacity drainage channel, while the geotextile filter prevents soil particles from blocking water flow. In addition to protecting waterproof membranes from backfill damage and root penetration, Double Drain can improve the thermal performance of below-ground structures. It is quick to install, lightweight, and can often be used as an alternative to traditional protection boards where effective drainage and membrane protection are required.\u003c\/p\u003e\n\u003cp data-end=\"1251\" data-start=\"730\"\u003e\u003cimg alt=\"RIW Double Drain drainage membrane\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0321\/5320\/6920\/files\/RIWDoubleDrain20mx2m.png?v=1784555472\"\u003e\u003c\/p\u003e\n\u003ch3 data-end=\"1268\" data-start=\"1253\" data-section-id=\"17xbmye\"\u003eKey Benefits\u003c\/h3\u003e\n\u003cul data-end=\"1826\" data-start=\"1270\"\u003e\n\u003cli data-end=\"1316\" data-start=\"1270\" data-section-id=\"1rvzwkr\"\u003eHigh-capacity geocomposite drainage membrane\u003c\/li\u003e\n\u003cli data-end=\"1377\" data-start=\"1317\" data-section-id=\"15bqvk1\"\u003eRelieves hydrostatic pressure from below-ground structures\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"1378\" data-section-id=\"kp2jca\"\u003eProtects waterproofing membranes during backfilling\u003c\/li\u003e\n\u003cli data-end=\"1470\" data-start=\"1432\" data-section-id=\"jyubiu\"\u003eHigh impact and compressive strength\u003c\/li\u003e\n\u003cli data-end=\"1516\" data-start=\"1471\" data-section-id=\"wju73o\"\u003ePrevents groundwater reaching the structure\u003c\/li\u003e\n\u003cli data-end=\"1581\" data-start=\"1517\" data-section-id=\"1v51uh4\"\u003eEliminates the need for granular backfill in many applications\u003c\/li\u003e\n\u003cli data-end=\"1642\" data-start=\"1582\" data-section-id=\"15vyl4g\"\u003eGeotextile filter prevents drainage channels from clogging\u003c\/li\u003e\n\u003cli data-end=\"1695\" data-start=\"1643\" data-section-id=\"t0xz2i\"\u003eSuitable for vertical and horizontal installations\u003c\/li\u003e\n\u003cli data-end=\"1729\" data-start=\"1696\" data-section-id=\"12aek5l\"\u003eLightweight and easy to install\u003c\/li\u003e\n\u003cli data-end=\"1762\" data-start=\"1730\" data-section-id=\"1e1sozu\"\u003eLong-term drainage performance\u003c\/li\u003e\n\u003cli data-end=\"1814\" data-start=\"1763\" data-section-id=\"lvuxo4\"\u003eCan be used as an alternative to protection board\u003c\/li\u003e\n\u003cli data-end=\"1826\" data-start=\"1815\" data-section-id=\"16vhj4q\"\u003eCE Marked\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"1843\" data-start=\"1828\" data-section-id=\"mu966k\"\u003eApplications\u003c\/h3\u003e\n\u003cul data-end=\"2060\" data-start=\"1845\"\u003e\n\u003cli data-end=\"1869\" data-start=\"1845\" data-section-id=\"sbdkou\"\u003eBasement waterproofing\u003c\/li\u003e\n\u003cli data-end=\"1887\" data-start=\"1870\" data-section-id=\"p2222w\"\u003eRetaining walls\u003c\/li\u003e\n\u003cli data-end=\"1906\" data-start=\"1888\" data-section-id=\"1fqflt2\"\u003eFoundation walls\u003c\/li\u003e\n\u003cli data-end=\"1921\" data-start=\"1907\" data-section-id=\"1tf0jp4\"\u003ePodium decks\u003c\/li\u003e\n\u003cli data-end=\"1937\" data-start=\"1922\" data-section-id=\"1r3zml5\"\u003eRoof terraces\u003c\/li\u003e\n\u003cli data-end=\"1950\" data-start=\"1938\" data-section-id=\"1wy08ay\"\u003eReservoirs\u003c\/li\u003e\n\u003cli data-end=\"1977\" data-start=\"1951\" data-section-id=\"1pamwer\"\u003eExternal tanking systems\u003c\/li\u003e\n\u003cli data-end=\"2003\" data-start=\"1978\" data-section-id=\"1cfmfzp\"\u003eBelow-ground structures\u003c\/li\u003e\n\u003cli data-end=\"2030\" data-start=\"2004\" data-section-id=\"re4em2\"\u003eWaterproofing protection\u003c\/li\u003e\n\u003cli data-end=\"2060\" data-start=\"2031\" data-section-id=\"1jb6mcs\"\u003eHydrostatic pressure relief\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"2086\" data-start=\"2062\" data-section-id=\"1uhri7u\"\u003eTechnical Information\u003c\/h3\u003e\n\u003cul data-end=\"2508\" data-start=\"2088\"\u003e\n\u003cli data-end=\"2149\" data-start=\"2088\" data-section-id=\"nweeyu\"\u003eProduct Type: HDPE drainage membrane with geotextile filter\u003c\/li\u003e\n\u003cli data-end=\"2174\" data-start=\"2150\" data-section-id=\"1d6thf7\"\u003eOverall Thickness: 8mm\u003c\/li\u003e\n\u003cli data-end=\"2196\" data-start=\"2175\" data-section-id=\"v1mffx\"\u003eRoll Size: 2m × 20m\u003c\/li\u003e\n\u003cli data-end=\"2222\" data-start=\"2197\" data-section-id=\"3rmvlp\"\u003eCoverage per Roll: 40m²\u003c\/li\u003e\n\u003cli data-end=\"2247\" data-start=\"2223\" data-section-id=\"18q1crk\"\u003eRoll Weight: 0.58kg\/m²\u003c\/li\u003e\n\u003cli data-end=\"2294\" data-start=\"2248\" data-section-id=\"7f3akr\"\u003eMaximum Drainage Capacity: 2.25 litres\/sec\/m\u003c\/li\u003e\n\u003cli data-end=\"2335\" data-start=\"2295\" data-section-id=\"px4936\"\u003eMaximum Compressive Strength: 150kN\/m²\u003c\/li\u003e\n\u003cli data-end=\"2373\" data-start=\"2336\" data-section-id=\"iwwqp5\"\u003eWorking Temperature: -30°C to +80°C\u003c\/li\u003e\n\u003cli data-end=\"2391\" data-start=\"2374\" data-section-id=\"1gm01am\"\u003eLap Width: 70mm\u003c\/li\u003e\n\u003cli data-end=\"2407\" data-start=\"2392\" data-section-id=\"1kizpvg\"\u003eColour: Brown\u003c\/li\u003e\n\u003cli data-end=\"2446\" data-start=\"2408\" data-section-id=\"1phyasf\"\u003eInstallation: Vertical or horizontal\u003c\/li\u003e\n\u003cli data-end=\"2508\" data-start=\"2447\" data-section-id=\"15jwla8\"\u003eCE Marked to EN 13252\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"2539\" data-start=\"2510\" data-section-id=\"1r8frcv\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp data-end=\"2579\" data-start=\"2541\"\u003e\u003cstrong data-end=\"2579\" data-start=\"2541\"\u003eWhat is RIW Double Drain used for?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"2745\" data-start=\"2581\"\u003eIt protects below-ground waterproofing membranes while creating a drainage layer that channels groundwater away from the structure and reduces hydrostatic pressure.\u003c\/p\u003e\n\u003cp data-end=\"2793\" data-start=\"2747\"\u003e\u003cstrong data-end=\"2793\" data-start=\"2747\"\u003eCan Double Drain replace protection board?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"2942\" data-start=\"2795\"\u003eYes. In many waterproofing systems it can be used as an alternative to traditional protection boards while providing the added benefit of drainage.\u003c\/p\u003e\n\u003cp data-end=\"2974\" data-start=\"2944\"\u003e\u003cstrong data-end=\"2974\" data-start=\"2944\"\u003eWhich side faces the soil?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"3130\" data-start=\"2976\"\u003eThe geotextile filter fabric should face outwards towards the surrounding ground, allowing water to enter the drainage channels while preventing clogging.\u003c\/p\u003e\n\u003cp data-end=\"3172\" data-start=\"3132\"\u003e\u003cstrong data-end=\"3172\" data-start=\"3132\"\u003eWhere can Double Drain be installed?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"3290\" data-start=\"3174\"\u003eIt is suitable for basements, retaining walls, reservoirs, podium decks, terraces and other below-ground structures.\u003c\/p\u003e\n\u003cp data-end=\"3319\" data-start=\"3292\"\u003e\u003cstrong data-end=\"3319\" data-start=\"3292\"\u003eWhat size is each roll?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"3442\" data-start=\"3321\"\u003eEach roll measures 2m wide by 20m long and provides approximately 40m² of coverage.\u003c\/p\u003e\n\u003cp data-end=\"3050\" data-start=\"2932\"\u003eDownloads\u003c\/p\u003e\n\u003cp data-end=\"3050\" data-start=\"2932\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0321\/5320\/6920\/files\/RIW_DOUBLE_DRAIN_2021-03-15.pdf?v=1784555586\" title=\"RIW Double Drain Data Sheet\"\u003eData Sheet\u003c\/a\u003e\u003c\/p\u003e","brand":"RIW","offers":[{"title":"20m x 2m","offer_id":57312992330103,"sku":"RIWDOUBLEDRAIN20X2","price":879.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0321\/5320\/6920\/files\/RIWDoubleDrain20mx2m.png?v=1784555472","url":"https:\/\/clevershieldcoatings.co.uk\/products\/riw-double-drain-20m-x-2m","provider":"Clever Shield - Asset Protection","version":"1.0","type":"link"}