Foam Board Insulation Attic Rafters

Select rigid foam insulation boards that are at least 1 2 inch less in thickness than the rafter space is deep if you plan to finish the attic as living space.

Foam board insulation attic rafters. Consider using spray foam insulation as well to seal smaller cracks and gaps. It is an excellent installation option for the attic because it is lightweight easy to work with and offers high r values. You can use foam board in the attic. Polyurethane or polystyrene spray foams can provide thorough coverage to roof rafters and attic walls in much less time than is needed for other materials.

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. Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly. Often the r value of fiberglass insulation is too low and requires the rafters to be retrofitted making foam board a better choice. Foam board insulation is easy to cut with a circular saw with a masonry blade or scored with a utility knife and snapped like you would drywall.