Combining Rigid Foam And Batt Insulation

Foam board insulation can add insulation and eliminate thermal bridging when used in wall and ceiling assemblies insulated with batts.

Combining rigid foam and batt insulation.

It can potentially replace the vapor barrier and house wrap as well. You can get similar results as doing all closed cell foam but with less cost. Yes foam board insulation is an excellent complement to batt insulation. You can use a variety of insulation materials.

Flash and batt is a combination of spray foam insulation with fiberglass batts. Cutting rigid foam board to fit between studs will be labour intensive and will not offer any significant improvement to your wall s thermal performance. Understand that the function of the vapor barrier is to prevent moisture from migrating from the warm side into the total thickness of insulation towards the cold side where at some point the temperature gradient will drop. It s a technique used by some insulation contractors where a flash of closed cell spray foam at 1 to 2 inches is applied in an effort to create an air seal and then puts fiberglass batt insulation over it.

The layering is from the outside inwards roof 1 in. Foam it green spray foam insulation can be combined with other insulation to make a powerful hybrid method. Airspace rigid foam batts vapor barrier plastic drywall. Flash fill flash batt using 2 different types of insulation for lower cost.

Researchers who have measured the moisture content of rim joists with rigid foam on both sides haven t discovered any problems the moisture content of the rim joists isn t worrisome.