Foam Board Insulation In Attic Rafters

Attic hatch or door.

Foam board insulation in attic rafters. Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly. 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. Consumers are often told by spray foam contractors to do the 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. 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. 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. Remove all blown in insulation 2.

2 snap a chalk line between the length measurements. If you re not do the attic floor. Often the r value of fiberglass insulation is too low and requires the rafters to be retrofitted making foam board a better choice. Affix rigid foam insulation to the attic side of the hatch or door.

If you re using the attic for living space then you need to insulate the rafters. 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. 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. That s because it s easier for the contractor to spray than clean up existing insulation deal with any can lights or venting etc.

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. 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.