{"product_id":"green-vapour-barrier-4m-x-50m-moisture-blocking","title":"Vapour Barrier – Green – Moisture Blocking for Residential \u0026 Commercial Use","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Green Vapour Barrier sheeting, measuring 4m in width and 50m in length, is a polyethylene membrane designed to prevent the passage of water vapour into colder areas of building fabric. Its 125mu (500-gauge) thickness provides high vapour resistance, protecting insulation, structural layers, and internal finishes. The membrane acts as a complete vapour and air barrier, positioned on the warm side of insulation to stop moisture-laden indoor air from reaching cold surfaces where condensation could occur. By preventing interstitial condensation, it protects against mould growth, damp staining, and deterioration of insulation materials, supporting long-term structural integrity. Its durable polymer construction ensures stable performance across wall, floor, and ceiling applications in both residential and commercial environments.\u003c\/p\u003e\u003cdiv style=\"margin-top:30px;\"\u003e\n\u003ch2 style=\"font-size:22px;font-weight:700;color:#1a1a2e;margin-bottom:16px;\"\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;border:1px solid #e0e0e0;border-radius:4px;overflow:hidden;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background:#1a1a2e;\"\u003e\n\u003cth style=\"padding:12px 16px;text-align:left;color:#ffffff;font-weight:600;text-transform:uppercase;font-size:12px;letter-spacing:0.5px;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding:12px 16px;text-align:left;color:#ffffff;font-weight:600;text-transform:uppercase;font-size:12px;letter-spacing:0.5px;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#f8f9fa;\"\u003e\n\u003ctd style=\"padding:12px 16px;font-weight:600;color:#333;border-bottom:1px solid #e9ecef;width:45%;\"\u003eThickness\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px;color:#555;border-bottom:1px solid #e9ecef;\"\u003e125mu\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:12px 16px;font-weight:600;color:#333;border-bottom:1px solid #e9ecef;width:45%;\"\u003eWidth\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px;color:#555;border-bottom:1px solid #e9ecef;\"\u003e4m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f8f9fa;\"\u003e\n\u003ctd style=\"padding:12px 16px;font-weight:600;color:#333;border-bottom:1px solid #e9ecef;width:45%;\"\u003eLength\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px;color:#555;border-bottom:1px solid #e9ecef;\"\u003e50m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:12px 16px;font-weight:600;color:#333;border-bottom:1px solid #e9ecef;width:45%;\"\u003eSales Unit\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px;color:#555;border-bottom:1px solid #e9ecef;\"\u003eRoll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f8f9fa;\"\u003e\n\u003ctd style=\"padding:12px 16px;font-weight:600;color:#333;border-bottom:1px solid #e9ecef;width:45%;\"\u003eSales Unit Coverage\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px;color:#555;border-bottom:1px solid #e9ecef;\"\u003e200m2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:12px 16px;font-weight:600;color:#333;border-bottom:1px solid #e9ecef;width:45%;\"\u003eGauge\u003c\/td\u003e\n\u003ctd style=\"padding:12px 16px;color:#555;border-bottom:1px solid #e9ecef;\"\u003e500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture restriction\u003c\/strong\u003e: Blocks the movement of warm, moisture-laden air to reduce the risk of condensation within the building fabric.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondensation prevention\u003c\/strong\u003e: Helps protect insulation layers from dampness, maintaining long-term thermal performance and material stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced energy efficiency\u003c\/strong\u003e: Supports consistent internal temperatures by preserving insulation effectiveness throughout seasonal changes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable polyethylene construction\u003c\/strong\u003e: Provides reliable resistance against tearing, puncturing, and degradation during installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir barrier performance\u003c\/strong\u003e: Creates a continuous airtight layer when installed with sealed joints to support overall building airtightness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh vapour resistance\u003c\/strong\u003e: Delivers a vapour resistance of 266 MNs\/g for robust moisture control in demanding environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal wall assemblies\u003c\/strong\u003e: Installed on the warm side of insulation to prevent vapour ingress into colder structural layers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCeiling and roof build-ups\u003c\/strong\u003e: Provides moisture control beneath insulated roof structures to limit condensation risk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFloor systems\u003c\/strong\u003e: Acts as a vapour barrier above ground floors where internal humidity requires controlled containment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarm-side placement\u003c\/strong\u003e: Position the membrane on the interior side of insulation to maintain correct vapour control performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubstrate preparation\u003c\/strong\u003e: Ensure framing, insulation surfaces, and junctions are clean and suitable for achieving continuous coverage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixing application\u003c\/strong\u003e: Secure the membrane using appropriate methods to ensure a tight fit.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Polyethylene\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVapour Resistance:\u003c\/strong\u003e 266 MNs\/g\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Can this barrier be used in both residential and commercial buildings?\u003c\/strong\u003e\u003cbr\u003eA: Yes, it is suitable for both environments due to its durable polymer construction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: How does this barrier enhance energy efficiency?\u003c\/strong\u003e\u003cbr\u003eA: It maintains insulation effectiveness, supporting consistent internal temperatures and reducing heat-loss pathways.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"londonbricks-uk.co.uk","offers":[{"title":"Default Title","offer_id":55516462940545,"sku":"MM_LB3173","price":179.98,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0687\/5329\/3624\/files\/fe172525d1f9186a6a132d0e29d684ac.png?v=1775834079","url":"https:\/\/londonbricks-uk.co.uk\/products\/green-vapour-barrier-4m-x-50m-moisture-blocking","provider":"London Bricks UK","version":"1.0","type":"link"}