Griffolyn roofing vapor retarders are available in stock sizes which are available for immediate. Made from durable and strong internally reinforced polyethylene laminates the griffolyn roof vapor retarder and barrier system withstands extreme temperatures and is highly resistant to punctures and tears. Roof vapor retarders barriers.
Typically a vapor retarder has to have a perm rating of 1 0 or less to be successful. Everyone knows that water in roof systems is never a positive. 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.
Most buildings especially those with metal roofing or siding can benefit from a roof vapor barrier. With a little over a month of winter left moisture damage from rain snow and ice remains a concern. What is a roof vapor barrier.
That reduction of air and moisture infiltration can then help improve roof longevity. 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. A vapour barrier sometimes referred to as vapour retarder is typically a plastic or foil sheet used for damp proofing to prevent interstitial condensation from forming in various building assemblies such as walls roofs foundations and floors.
What is a vapour barrier. An introduction to vapour barriers and vapour retarders. A vapor barrier or vapour barrier is any material used for damp proofing typically a plastic or foil sheet that resists diffusion of moisture through the wall floor ceiling or roof assemblies of buildings to prevent interstitial condensation and of packaging technically many of these materials are only vapor retarders as they have varying degrees of permeability.
