Foam Board Insulation Attic Rafters

Consider using spray foam insulation as well to seal smaller cracks and gaps.

Foam board insulation attic rafters.

Get your kits the easy to use spray foam kit. R value of 7 in 1 inch 97 closed cell foam. 2 measure and cut the foam boards as. It is an excellent installation option for the attic because it is lightweight easy to work with and offers high r values.

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. Spray foam insulation that s convenient and easy to use. 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. The 4 of rigid foam under the rafters at least give you r26.

The best attic insulation. 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. 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.

Use closed cell foam it green for 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. You can use rigid foam panels or do as tom silva does with nearly all houses these days. The superattic system creates a continuous air and insulation barrier directly beneath the attic roof with no thermal bridging to compromise energy performance.

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. Class i e 84 fire retardant meets building code spec. Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly. You can use foam board in the attic.

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