Foam Board Insulation Attic Rafters

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 attic rafters.

It is an excellent installation option for the attic because it is lightweight easy to work with and offers high r values. 2 measure and cut the foam boards as. Spray foam insulation that s convenient and easy to use. The 4 of rigid foam under the rafters at least give you r26.

The best attic insulation. 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. Consider using spray foam insulation as well to seal smaller cracks and gaps. You can use rigid foam panels or do as tom silva does with nearly all houses these days.

Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly. But a 2x6 rafter with a 1 5 vent space would give you the ability to put 4 of rigid insulation r 26 in that space which was not filled. 2 would be to create the baffle in the 1st place. 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.

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. Use closed cell foam it green for attic rafters. Get your kits the easy to use spray foam kit. Hire a pro to install spray foam insulation.

You can use foam board in the attic. If you re considering turning your attic into conditioned storage or living space it s worth changing tactics to insulate between the rafters and wall joists instead of the floor. 100 free of cfcs vocs penta bdes urea formaldehyde. To attach the insulation you can use screws with large washers a special adhesive made for adhering foam board insulation or for smaller pieces you can seal them in with caulk or spray foam.

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. Insulating boards are just one of the many types of foam insulation.