Foam Board Insulation In Attic Rafters

If you re using the attic for living space then you need to insulate the rafters.

Foam board insulation in attic rafters. Cut foam board to fit in between joists. Add weatherstripping around the perimeter and a sweep to the door of a walk up attic. R matte plus 3 thermasheath 3 is rigid foam plastic thermal insulation r matte plus 3 thermasheath 3 is rigid foam plastic thermal insulation board. 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.

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. Often the r value of fiberglass insulation is too low and requires the rafters to be retrofitted making foam board a better choice. 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. Consumers are often told by spray foam contractors to do the rafters.

That s because it s easier for the contractor to spray than clean up existing insulation deal with any can lights or venting etc. It is an excellent installation option for the attic because it is lightweight easy to work with and offers high r values. 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. 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.

Affix rigid foam insulation to the attic side of the hatch or door. It s made of environmentally sound closed cell polyisocyanurate foam bonded to a durable white matte non glare aluminum facer and a reflective reinforced aluminum facer. 2 snap a chalk line between the length measurements. Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly.

You can use foam board in the attic. Use spray foam to seal the foam between the joists this will both insulate and create my air barrier for this portion of the attic.