Foam Board Insulation Attic Rafters

The 4 of rigid foam under the rafters at least give you r26.

Foam board insulation attic rafters.

Consider using spray foam insulation as well to seal smaller cracks and gaps. Use closed cell foam it green for attic rafters. You can use foam board in the attic. The best attic insulation.

Spray foam insulation that s convenient and easy to use. 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. 2 would be to create the baffle in the 1st place. 2 measure and cut the foam boards as.

Get your kits the easy to use spray foam kit. R value of 7 in 1 inch 97 closed cell 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. Class i e 84 fire retardant meets building code spec.

Insulating boards are just one of the many types of foam insulation. Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly. 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. You can use rigid foam panels or do as tom silva does with nearly all houses these days.

Often the r value of fiberglass insulation is too low and requires the rafters to be retrofitted making foam board a better choice. 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. 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. 100 free of cfcs vocs penta bdes urea formaldehyde.

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. Hire a pro to install spray foam insulation.