Foam Board Insulation Attic Rafters

A 4 by 8 board weighs next to nothing and can easily be cut to fit.

Foam board insulation attic rafters.

It is lightweight and easy to work with. Typical thicknesses range from inch to 2 inches with estimated r values of r 3 for the inch to r 10 for the 2 inch board. R value of 7 in 1 inch 97 closed cell foam. Some of the most reviewed foam board insulation are the silverboard 24 in.

The superattic system utilizes proprietary silverglo rigid foam insulation panels to fully seal and insulate the attic directly beneath the roof rafters and directly inside the gable ends. Rigid foam board also known as foam board or insulation board can be an excellent option for insulation. R5 radiant acoustic insulation kit stc 19 5 piece with 172 reviews and the amvic multipurpose high density insulation kit r10 2 3 8 in. Class i e 84 fire retardant meets building code spec.

The superattic system creates a continuous air and insulation barrier directly beneath the attic roof with no thermal bridging to compromise energy. Measure the length and width between two rafters in your attic and transfer the measurements to a 4 ft by 8 ft of rigid foam insulation board. To simplify things and save a lot of time cutting and fitting you could just nail the iso board to the bottom of the rafters. As for iso board vs.

Spray foam insulation that s convenient and easy to use. 2 snap a chalk line between the length measurements. Seal the seams with contractor s tape and seal the foam board edges to the wall with spray foam. Spray foam the iso board would be a lot cheaper especially if this is a diy project.

Use closed cell foam it green for attic rafters. Get your kits the easy to use spray foam kit.