Our Permo Frame is a breathable membrane for walls, ideal for timber frame construction where it allows the structure to breathe while protecting the insulation. Our range of air and vapour control layers are designed to minimise the transfer of moisture to the structure and are ideal for use on both wall and roof applications. Installed on the.. Applications. SMARTPLY AIRTIGHT is designed for use as internal structural sheathing on the warm side of the insulation in timber frame construction systems. The integrated vapour control layer and air barrier properties eliminate the need for additional Air and Vapour Control Layout (AVCL) membranes. The coating also provides a smooth durable.

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According to naturally:wood, timber building components provide lower thermal conductivity than equivalents in concrete, steel-frame and masonry. Quality timber frame housing demands effective vapour control. Timber buildings, of course, must match or beat other construction types on quality and durability.. A Vapour Control Layer, or VCL for short, is a plastic layer that restricts the movement of warm, moist air from inside a property into the fabric of the building. VCLs prevent excess moisture entering a wall's cavity, behind the insulation. This reduces the risk of harmful interstitial condensation by ensuring that any moisture within the.