How To Install Rigid Foam Insulation In Attic

Once the attic is prepared then start to install the insulation.

How to install rigid foam insulation in attic.

Installing foam insulation boards in the attic is no that hard and can save you money compared with professional installation. 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. The fit should be firm but not so firm that the edges of the foam begin to tear.

You can use a utility knife to cut using the same cut and snap process you use with drywall. Keep foam board insulation away from direct sunlight prior to installation. Use a chalk line or t square to mark where it needs to be cut. It will degrade its r value.

Foam board insulation in the attic can cut down on energy costs and simultaneously promote a more environmentally sound way of daily living. Affix rigid foam insulation to the attic side of the hatch or door. In addition to installing the foam board on the underside of the roof deck you can attach it to the bottom edges of the. 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.

How do you install rigid foam board. Add weatherstripping around the perimeter and a sweep to the door of a walk up attic. Measure the space between rafters and cut the board to fit. Seal the perimeter of each piece of rigid foam with caulk canned spray foam or high quality tape.

When installing rigid insulation in an attic to be finished as a living space you must provide a route by which hot air. Cover the insulation with a vapor barrier before you install it. If this happens pull out the sheet and slightly trim down the edges with the saw. Set first piece of rigid insulation.

Mark the insulation where it lines up with the center of the rafter closest to the farthest edge. Install the rigid foam insulation place each rigid foam sheet in its own wall bay. For more information on the work i have described see two ways to insulate attic kneewalls. Cut the insulation with a utility.

Attic hatch or door. When installing the foam use caulk or tape for maximum insulation between the material and the board or floor. 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. A table saw will also cut the board but it.