{"product_id":"polythene-500g-black-4m-x-25m-100m2-roll","title":"125mu (500G) Black Polythene Damp Proof Membrane (DPM) 4m x 25m (100m2\/Roll)","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Black Polythene Damp Proof Membrane is a polyethylene sheeting designed to resist moisture transfer from the ground into floor constructions.\u003cbr\u003e\u003cbr\u003eManufactured to consistent thickness and density, it provides a reliable barrier layer suitable for domestic and light-commercial slab applications.\u003cbr\u003e\u003cbr\u003eIts flexible, tear-resistant structure supports straightforward cutting, laying, and jointing across prepared sub-base surfaces. The membrane offers compatible integration with insulation, concrete slabs, screeds, and damp-proof detailing at wall junctions.\u003cbr\u003e\u003cbr\u003eSupplied in 125mu (500G) thickness on a 4m × 25m roll, providing 100m² of coverage.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture resistance\u003c\/strong\u003e: Forms an effective barrier against moisture rising from the ground.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent material quality\u003c\/strong\u003e: Manufactured to uniform thickness supporting predictable performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible installation\u003c\/strong\u003e: Suitable for laying over sand blinding or insulation prior to concrete placement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable sheeting\u003c\/strong\u003e: Resists tearing during handling and positioning on site.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility\u003c\/strong\u003e: Can be used within standard floor build-ups including insulation and screed layers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoll identification\u003c\/strong\u003e: Supplied in 125mu (500G) thickness on a 4m × 25m roll providing 100m² coverage.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround floor slabs\u003c\/strong\u003e: Suitable for use beneath concrete floors in housing and light-commercial buildings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScreeded floors\u003c\/strong\u003e: Appropriate as a separating layer below sand\/cement screeds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulation layers\u003c\/strong\u003e: Suitable for placement beneath rigid floor insulation where required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction refurbishment\u003c\/strong\u003e: Provides damp-proofing in upgrade or replacement floor systems.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub-base preparation\u003c\/strong\u003e: Lay over a smooth, compacted surface or sand blinding to prevent punctures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJointing method\u003c\/strong\u003e: Overlap sheets by recommended laps and seal using approved DPM tape.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge detailing\u003c\/strong\u003e: Continue membrane up perimeter walls to meet the damp-proof course where required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection\u003c\/strong\u003e: Avoid damage from sharp objects or foot traffic during installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note\u003c\/strong\u003e: Installation must comply with BS 8102 and relevant building regulations for moisture protection.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial classification\u003c\/strong\u003e: Manufactured from polyethylene suitable for use as a damp-proof membrane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture control\u003c\/strong\u003e: Designed to resist moisture penetration from the ground into building structures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability\u003c\/strong\u003e: Suitable for long-term service life when installed within a protected floor construction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandling note\u003c\/strong\u003e: Store rolls in a clean, dry location and protect from direct sunlight prior to installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note\u003c\/strong\u003e: Ensure compatibility with other elements of the damp-proof system including DPCs and insulation.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Unbranded","offers":[{"title":"125mu","offer_id":53771532828783,"sku":"5004032","price":34.21,"currency_code":"GBP","in_stock":true},{"title":"250mu","offer_id":53771532861551,"sku":"5004075","price":49.74,"currency_code":"GBP","in_stock":true},{"title":"300mu","offer_id":53771532894319,"sku":"5004076","price":50.22,"currency_code":"GBP","in_stock":true},{"title":"500mu","offer_id":53771532927087,"sku":"5004123","price":52.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9784\/4591\/files\/roll_of_black_polythene_damp_proof_membrane.jpg?v=1783758663","url":"https:\/\/supplyyard.co.uk\/products\/polythene-500g-black-4m-x-25m-100m2-roll","provider":"Supply Yard","version":"1.0","type":"link"}