Air Vapor Barrier R Value

This unique function gives them a relatively high initial r value of 4 7 per inch.

Air vapor barrier r value.

This is an important part of keeping heat in and or out of a space in walls attics crawl spaces etc but isn t a replacement for thinking about air and vapor barriers. Gps special feature is its r value s longevity. A few more factors. Blocks the movement of air eliminating the need for a vapor barrier absorbs sound like a sponge and flexes with the seasonal movement of the framing.

When used with one side exposed to an attic skyflex adds an additional 1 7 r value to the system. Ccw 705 xlt strips datasheet ccw 705 xlt is a low temp version of 705 strips. Low density polyurethane spray foam. When installed with 1 5 of enclosed air space skyflex adds 2 6 r value and when installed with 075 of enclosed air space it adds an additional 2 9 r value.

Ccw 705 twf datasheet sds spec detail certs self adhering thru wall flashing. Air barrier white paper. Ccw 705 twf xlt datasheet a 40 mil thick self adhering. Vapor barrier 0 0 common rules of thumb type of building section r value wood frame walls 3 plus r value of the insulation used floors above unheated spaces 2 plus r value of the insulation used ceilings 1 1 2 plus r value of the insulation single glazed windows 0 88 double glazed windows 1 67.

Insulation is rated in r value with the higher the r value the greater the resistance to the movement of heat. Avoidance of the installation of vapor barriers such as polyethylene vapor barriers foil faced batt insulation and reflective radiant barrier foil insulation on the interior of air conditioned assemblies a practice that has been linked with moldy buildings lstiburek 2002. The products work equally well as air or vapor barrier on precast concrete cast in place concrete masonry concrete block interior and exterior gypsum board styrofoam primed steel aluminum mill finish anodized aluminum primed galvanized metal drywall and plywood. The graphite in these foam boards reflects radiant heat complementing the foam air bubbles ability to block conductive heat.

Call us at 800 342 5976. The average wall has 3 5 inches of insulation with an installed r value of r 14 under ideal conditions. Installed r value includes the whole wall system with studs sheathing board insulation and siding and takes wind movement into account.