Roof Vapour Barrier Membrane

A roof design that includes an adhered roof membrane with multiple layers of insulation with board joints offset and staggered over a vapor retarder air barrier helps lower the risk that air and the moisture it carries will infiltrate the roof system.

Roof vapour barrier membrane.

2 results filter functions. That reduction of air and moisture infiltration can then help improve roof longevity. Everyone knows that water in roof systems is never a positive. Its purpose is to help prevent water vapour from reaching building walls ceilings attics crawlspaces or roofs where it can condense and cause building materials to rot or grow mould.

Air and vapor barrier membrane redzone. A vapor retarder is a material or system that is designed as part of the roof system to substantially reduce the movement of water vapor into the roof system where it can condense. There is often confusion between air barriers and vapors retarders. Sopravap r is an sbs modified bitumen vapor barrier for use in approved multi ply membrane and flashing assemblies.

The purpose of a vapor retarder is to minimize or reduce water vapor diffusion into a low slope roof or wall system. The purpose of vapour barriers. Show the product. Typically a vapor retarder has to have a perm rating of 1 0 or less to be successful.

When discussing air barriers roofing membranes and the building envelope another important topic comes to mind. Certainteed s membrain continuous air barrier smart vapor retarder is the industry s most advanced technology to create a better performing home. Self adhesive air and vapor barrier membrane blueskin sa is a self adhering membrane consisting of an sbs rubberized asphalt compound laminated on a blue polyethylene film. Moisture in homes is unavoidable making moisture in wall cavities nearly inevitable and dangerous if not properly addressed.

Impermeable to air moisture vapor and water blueskin sa is designed to install easily on a variety of prepared substrates.