Foam Board Insulation Attic Rafters

Get your kits the easy to use spray foam kit.

Foam board insulation attic rafters.

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

Consider using spray foam insulation as well to seal smaller cracks and gaps. 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. Hire a pro to install spray foam insulation.

2 measure and cut the foam boards as. 2 would be to create the baffle in the 1st place. The superattic system creates a continuous air and insulation barrier directly beneath the attic roof with no thermal bridging to compromise energy performance. 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.

Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly. Use closed cell foam it green for attic rafters. 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. 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 is easy to cut with a circular saw with a masonry blade or scored with a utility knife and snapped like you would drywall. Class i e 84 fire retardant meets building code spec. You can use rigid foam panels or do as tom silva does with nearly all houses these days. The best attic insulation.

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