{"product_id":"4m-x-50m-x-500g-black-polythene-vapour-control-layer","title":"4m x 50m x 500g Black Polythene Vapour Control Layer","description":"\u003cp\u003eA 500-gauge (125 µm) black polythene vapour control layer for use as a slip membrane and moisture separator beneath floating screeds and insulation. It prevents moisture migration from the sub-base into the screed while allowing the screed to move independently of the substrate, reducing the risk of cracking.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cdiv class=\"sw-benefits-grid\"\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003e500-gauge polythene for reliable moisture separation\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eSlip membrane function — allows screed to move independently\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eLarge 200 m² roll for efficient site coverage\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003ePrevents moisture migration from sub-base into screed\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eLightweight and easy to handle and position\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eSuitable beneath floating screeds and insulation boards\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eCost-effective damp separation layer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sw-benefit\"\u003e\n\u003cdiv class=\"sw-check\"\u003e​\u003c\/div\u003e\n\u003cspan\u003eCompatible with all screed types\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eLay the polythene sheet across the entire floor area with a minimum 200 mm overlap at all joints. Turn up at walls and columns to at least screed height. No taping of laps is required when used as a slip membrane only. Ensure the surface beneath is clean and free of sharp objects that could puncture the membrane.\u003c\/p\u003e\n\u003ch3\u003eCoverage\u003c\/h3\u003e\n\u003cp\u003eEach roll covers 200 m² (4 m × 50 m). Allow for 200 mm overlaps at all joints when calculating quantities. For typical rooms, allow approximately 5–10% additional material for overlaps and waste.\u003c\/p\u003e","brand":"TEKCEM","offers":[{"title":"Default Title","offer_id":51305555132755,"sku":"SCREEDWORKS-50M-STD","price":43.19,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0954\/6720\/9043\/files\/Screenshot2025-12-18at11.45.13.png?v=1766054724","url":"https:\/\/shop.screedworks.co.uk\/products\/4m-x-50m-x-500g-black-polythene-vapour-control-layer","provider":"screedworks","version":"1.0","type":"link"}