Roof Vapour Barrier Membrane

When discussing air barriers roofing membranes and the building envelope another important topic comes to mind.

Roof vapour barrier membrane.

There is often confusion between air barriers and vapors retarders. Air and vapor barrier membrane redzone. The purpose of vapour barriers. The purpose of a vapor retarder is to minimize or reduce water vapor diffusion into a low slope roof or wall system.

2 results filter functions. Everyone knows that water in roof systems is never a positive. Certainteed s membrain continuous air barrier smart vapor retarder is the industry s most advanced technology to create a better performing home. That reduction of air and moisture infiltration can then help improve roof longevity.

Sopravap r is an sbs modified bitumen vapor barrier for use in approved multi ply membrane and flashing assemblies. A vapour barrier is an important component in building construction. 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. Typically a vapor retarder has to have a perm rating of 1 0 or less to be successful.

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. 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. Show the product. Damage from water condensation due to water vapour movement called water vapour drive can wreak havoc on even the sturdiest of built structures and threaten the effectiveness of insulation.

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.