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OnBuy.com£10.49Visit shop (2M X 5M) Roof Vapour Barrier Membrane 2M X 50M 0.2Mmdamp Proof Yellow Floor Insulation 5063873005935
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This 0.2mm yellow vapour barrier membrane is designed for builders and homeowners seeking to effectively control moisture within building structures. Its key benefit is preventing condensation and dampness, reducing the risk of structural damage and improving energy efficiency. A potential caveat is ensuring proper sealing for optimal performance. The membrane offers reliable moisture protection, durable construction, and versatile applications for walls, roofs, ceilings, and floors.
| Model Part Number | VapourBarrier0.2mm |
|---|---|
| Brand | B2C |
The primary purpose is to control the passage of moisture vapor from the warmer interior of a building into the colder structural elements (like insulation and timbers), preventing condensation and dampness.
This refers to the nominal thickness of the polyethylene membrane. The thickness is approximately 0.2mm, with a tolerance of +/- 30%, making it durable and tear-resistant for construction use.
No, this membrane is specifically designed for vapor control and is not a waterproofing material. It must be protected from direct exposure to liquid water.
All overlaps should be a minimum of 100mm horizontally and 150mm vertically and must be securely sealed with compatible vapor-barrier tape to ensure an airtight and vapor-tight seal.
It should be installed on the warm side of the insulation, which is typically the interior side of the wall structure, behind the interior finishes like plasterboard.
Yes, the bright yellow color serves as a visual indicator to ensure correct placement and installation, helping builders quickly identify the membrane and its intended orientation on site.
The product meets professional building standards and is Attested Foil T30 certified, indicating proven reliability for its intended applications.
Check all overlaps, joints, and penetrations for adequate sealing. Ensure the membrane is installed on the correct (warm) side of the insulation and that there are no unintended air gaps or breaches in the membrane.
Handle the membrane carefully to avoid punctures. If a small tear occurs, patch it securely with compatible vapor-barrier tape, extending the tape at least 100mm beyond the tear in all directions. Ensure the patch is on the inside face of the membrane.
Use dedicated vapor-barrier tapes and sealants specifically designed for this type of membrane. Ensure surfaces are clean and dry before applying tape. Pay extra attention to detailing around windows, doors, and service penetrations.
Ensure the membrane is adequately supported and securely fixed. Proper temporary fixings and subsequent securing by internal linings will prevent sagging. If severe sagging occurs, it may indicate inadequate support or excessive moisture pressure, requiring re-inspection of the overall construction.
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