Roof Vapour Barrier Membrane

Typically a vapor retarder has to have a perm rating of 1 0 or less to be successful.

Roof vapour barrier membrane.

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. 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. 2 results filter functions. The purpose of a vapor retarder is to minimize or reduce water vapor diffusion into a low slope roof or wall system.

Certainteed s membrain continuous air barrier smart vapor retarder is the industry s most advanced technology to create a better performing home. Impermeable to air moisture vapor and water blueskin sa is designed to install easily on a variety of prepared substrates. 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. Sopravap r is an sbs modified bitumen vapor barrier for use in approved multi ply membrane and flashing assemblies.

The purpose of vapour barriers. Air and vapor barrier membrane redzone. A vapour barrier is an important component in building construction. 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.

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. There is often confusion between air barriers and vapors retarders. When discussing air barriers roofing membranes and the building envelope another important topic comes to mind. Moisture in homes is unavoidable making moisture in wall cavities nearly inevitable and dangerous if not properly addressed.

Sopravap r is composed of a proprietary formulation of elastomeric styrene butadiene styrene sbs polymer modified bitumen.