Installing Rigid Foam Insulation In An Attic

Fasten foam insulation boards to the interior of the rafters using screws or nails with 1 inch minimum washers or caps.

Installing rigid foam insulation in an attic.

In addition to installing the foam board on the underside of the roof deck you can attach it to the bottom edges of the. Seal the perimeter of each piece of rigid foam with caulk canned spray foam or high quality tape. Fasteners should be long enough to penetrate in to the rafter a minimum of inch. When installing a foil faced foam board insulation.

Keep foam board insulation away from direct sunlight prior to installation. Cover the insulation with a vapor barrier before you install it. The superattic system creates a continuous air and insulation barrier directly beneath the attic roof with no thermal bridging to compromise energy. When installing foam insulation boards in the attic make sure you start from one corner and work your way around the room.

When installing the foam use caulk or tape for maximum insulation between the material and the board or floor. For more information on the work i have described see two ways to insulate attic kneewalls. Cut the insulation with a utility knife. 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.

Mark the insulation where it lines up with the center of the rafter closest to the farthest edge. It will degrade its r value. Measure the space between rafters and cut the board to fit. You can use a utility knife to cut using the same cut and snap process you use with drywall.

Once the attic is prepared then start to install the insulation. A table saw will also cut the board but it. How do you install rigid foam board. All foam boards absorb water vapor.

Start at one corner of the attic and lay the piece of insulation lengthwise like a piece of drywall. Foam insulation boards can be attached to concrete walls as well and in such a case care should be taken not to chip the cement. When installing rigid insulation in an attic to be finished as a living space you must provide a route by which hot air.