Install Foam Board Insulation In Attic

A lot of builders and homeowners are going with spray foam insulation because of the airtightness benefits but then the questioner mentioned that the spray foam contractor had intentionally left big holes to the outside by not sealing the gable vents.

Install foam board insulation in attic.

Attic hatch or door. Fasteners should be long enough to penetrate in to the rafter a minimum of inch. 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. Affix rigid foam insulation to the attic side of the hatch or door.

Nothing unusual about that. Remove any existing pieces of insulation that might have been covering the attic walls until now. The fit should be firm but not so firm that the edges of the foam begin to tear. Add weatherstripping around the perimeter and a sweep to the door of a walk up attic.

Remove the old insulation boards carefully without causing any damage to the walls. To create an airtight seal use foil tape. Step 2 install insulation boards. Measure the length and width between two rafters in your attic and transfer the measurements to a 4 ft by 8 ft of rigid foam insulation board.

Energy saver eliminates the need to remove attic flooring and lose valuable attic storage space in order to make major energy saving upgrades in the attic. Firstly you can apply it directly onto the house s concrete walls with the help of a construction adhesive that will hold it in place. Earlier this year i got a question about a home that had spray foam insulation in the attic. Install the rigid foam insulation place each rigid foam sheet in its own wall bay.

Install foam boards with the foil side facing you. 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. Fasten foam insulation boards to the interior of the rafters using screws or nails with 1 inch minimum washers or caps. Use furring strips nailed into the sides of the rafters so that you have something to fasten the board to.

There s two ways you can go about with foam board insulation. Your board must leave at least inch gap between the board and the roof. Alternate fasteners may be used with the type and length as recommended by their manufacturer for securing foam plastic insulating sheathing. Secondly and this is the best way you can install a drywall to frame the wall before applying foam board insulation.