Rigid Foam Insulation Attic Rafters

R value of 7 in 1 inch 97 closed cell foam.

Rigid foam insulation attic rafters.

Now someone will look at an insulation value chart and says but foam has a higher r value per inch so it s better insulation since you have non infinite space to put it in. You can even place it under the foundation slab. Typical thicknesses range from inch to 2 inches with estimated r values of r 3 for the inch to r 10 for the 2 inch board. Install it anywhere from the roof to the foundation.

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. The superattic system creates a continuous air and insulation barrier directly beneath the attic roof with no thermal bridging to compromise energy performance. Spray foam insulation that s convenient and easy to use. With spray foam unlike with loose fill or batts you must cover the soffit vents they aren t needed to keep the roof cool.

Foam blocks airflow needs no vapor barrier and has a higher r value per inch than loose fill or batts so you ll get more protection with less depth. Use closed cell foam it green for attic rafters. 2 measure and cut the foam boards as. Then cover the foam with drywall as required for fire safety.

Hire a pro to install spray foam insulation. Rigid foam insulation packs a lot of r value into a thin package but not all rigid foam performs the same. A 4 by 8 board weighs next to nothing and can easily be cut to fit. Rigid insulation is one of the best tools to reduce your energy costs.

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. Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly. 100 free of cfcs vocs penta bdes urea formaldehyde. As we can see in terms of insulation value for your money the batts take a bat to all challengers.

You can use rigid foam panels or do as tom silva does with nearly all houses these days. Class i e 84 fire retardant meets building code spec. Rigid foam board also known as foam board or insulation board can be an excellent option for insulation. Get your kits the easy to use spray foam kit.

Rigid foam insulation also known as insulating boards provide high r values. Rigid foam panels are about 0 10 0 15 square foot r. Select rigid foam insulation boards that are at least 1 2 inch less in thickness than the rafter space is deep if you plan to finish the attic as living space. They keep your home at a comfortable temperature without the need to crank your heat.