Foam Board Insulation Attic Rafters

Spray foam the iso board would be a lot cheaper especially if this is a diy project.

Foam board insulation attic rafters.

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. 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. The best attic 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.

As for iso board vs. 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. Spray foam insulation that s convenient and easy to use. R value of 7 in 1 inch 97 closed cell foam.

A 4 by 8 board weighs next to nothing and can easily be cut to fit. 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. The superattic system creates a continuous air and insulation barrier directly beneath the attic roof with no thermal bridging to compromise energy. Use closed cell foam it green for attic rafters.

Seal the seams with contractor s tape and seal the foam board edges to the wall with spray foam. It is lightweight and easy to work with. Some of the most reviewed foam board insulation are the silverboard 24 in. Rigid foam board also known as foam board or insulation board can be an excellent option for insulation.

Class i e 84 fire retardant meets building code spec. 100 free of cfcs vocs penta bdes urea formaldehyde.