Roof Vapor Retarder Cost

Sopravap r is an sbs modified bitumen vapor barrier for use in approved multi ply membrane and flashing assemblies.

Roof vapor retarder cost. In a low slope roof assembly the vapor retarder is normally installed under the primary roof insulation. If you have designed or built a low slope roof with a single ply membrane at some point you will be confronted with this simple question. A vapor retarder is commonly installed on the warm interior side of a roof or wall. Most roof membranes are class i vapor retarders.

A 90 mil sbs modified asphalt base sheet can be used in multiple ply systems as an air and vapor barrier or a temporary roof for up to 60 days. Sopravap r is composed of a. For example sherwin williams master touch latex vapor barrier primer 1 sells for about 80 for a five gallon pail. Suremb 90tg 120tg base ply.

Vapor retarder paint costs about 20 40 a gallon or 60 90 for a five gallon pail. Everyone knows that water in roof systems is never a positive. With considerable costs at stake the prospect of omitting a vapor retarder is always a precarious notion and one that merits careful consideration of the project specific dynamics at play. Plywood 1 4 thick douglas fir exterior glue is a class ii vapor retarder with a perm rating of 0 7 perms.

Cold adhered asphalt adhered. Premium smooth surfaced sbs torch applied membranes reinforced with fiberglass mat. 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. Therefore one will often see it installed directly on a roof deck such as a concrete or wood deck or on a continuous substrate such as gypsum board or.

Out of stock online. A single layer self adhered bituminous vapor retarder has a perm rating of 0 03 perms. 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. Typically a vapor retarder has to have a perm rating of 1 0 or less to be successful.

Roofing vapor retarder air barrier. Astm d2178 astm e96. Vapor barrier paint is usually white and used as an undercoat primer. Is the vapor retarder necessary.

Vapor retarder roof coating. Air barrier with smart vapor retarder model 42821017 190 43 190 43. The same plywood with interior glue is a class iii vapor retarder with a perm rating of 1 9 perms. Certainteed membrain 12 ft.

Certainteed membrain 8 ft. Can be used as a base ply or air and vapor barrier. That reduction of air and moisture infiltration can then help improve roof longevity. The vapor retarder roof coating guarantees to prolong the life of the roof and reduce cooling energy costs with its undefeatable technology.