{"product_id":"riw-cavity-drain-r20","title":"RIW Cavity Drain R20","description":"\u003cp\u003eRIW Cavity Drain R20 is a 1mm thick HDPE profiled sheet cavity drainage membrane with 20mm high studs, designed for use as an internal Type C waterproofing system in basements, sub-structures and retaining walls. Rather than resisting water at source, it collects incoming water within the cavity created by its studded profile and channels it to a sump or drainage point for controlled disposal — protecting the usable space behind without relying solely on the structural envelope.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e20mm stud height provides a generous drainage void.\u003c\/li\u003e\n\u003cli\u003eHigh compressive strength makes R20 well suited to floor and wall applications where robust performance under load is required.\u003c\/li\u003e\n\u003cli\u003eIt can be applied to wet substrates and is compatible with concrete masonry sheet \u0026amp; concrete piled walls.\u003c\/li\u003e\n\u003cli\u003ePractical for a wide range of below ground applications\u003c\/li\u003e\n\u003cli\u003eComplete water and vapour barrier\u003c\/li\u003e\n\u003cli\u003eWhen using on walls \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWhen installed correctly cavity drain R20 is capable of meeting the protection requirements for grade 1,2 \u0026amp; 3 basements as classified in BS8102:2009, \u003c\/li\u003e\n\u003cli\u003eBBA certified\u003c\/li\u003e\n\u003cli\u003e1mm thick HDPE with 20mm studs\u003c\/li\u003e\n\u003cli\u003eHigh compressive strength\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eChemically resistant \u003c\/li\u003e\n\u003cli\u003eFixings required for one roll of R20 applied to walls is 5 brick plugs per m² and 6 rolls of sealing rope\u003c\/li\u003e\n\u003cli\u003eFixings required for one roll of R20 applied to floors is 5 rolls of sealing rope\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"RIW","offers":[{"title":"Default Title","offer_id":57127697908044,"sku":"BM05750","price":391.77,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/riw-riw-cavity-drain-r20-1232467541.jpg?v=1776258495","url":"https:\/\/www.constructionsuppliesuk.co.uk\/products\/riw-cavity-drain-r20","provider":"Construction Supplies UK","version":"1.0","type":"link"}