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.

Installing rigid foam insulation in an attic.

Seal the perimeter of each piece of rigid foam with caulk canned spray foam or high quality tape. 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. 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.

Start at one corner of the attic and lay the piece of insulation lengthwise like a piece of drywall. Measure the space between rafters and cut the board to fit. Mark the insulation where it lines up with the center of the rafter closest to the farthest edge. When installing the foam use caulk or tape for maximum insulation between the material and the board or floor.

It will degrade its r value. All foam boards absorb water vapor. The superattic system creates a continuous air and insulation barrier directly beneath the attic roof with no thermal bridging to compromise energy. Alternate fasteners may be used with the type and length as recommended by their manufacturer for securing foam plastic insulating sheathing.

A table saw will also cut the board but it. How do you install rigid foam board. Fasten foam insulation boards to the interior of the rafters using screws or nails with 1 inch minimum washers or caps. When installing a foil faced foam board insulation.

If there is any horizontal section of these joist bays that are exposed on one side to unconditioned space then the joist bays need to be insulated. When installing rigid insulation in an attic to be finished as a living space you must provide a route by which hot air. 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.

For more information on the work i have described see two ways to insulate attic kneewalls. Cover the insulation with a vapor barrier before you install it. Use a chalk line or t square to mark where it needs to be cut.