Rigid Foam Insulation Attic Roof

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.

Rigid foam insulation attic roof.

It is lightweight and easy to work with. Eps is by far the most versatile of the three rigid insulation options. A 4 by 8 board weighs next to nothing and can easily be cut to fit. This construction approach was first used in the 1970s and it has been implemented much more widely since it was first included in the international code council s icc model building code in 2007 irc section 806 4.

Eps is also the most inexpensive of the three types of rigid foam insulation while also meeting the required building and energy codes. It can be applied on the roof floor and walls and it s most widely used in structural insulated panels and insulated concrete forms. Rigid foam panels are about 0 10 0 15 square foot r as we can see in terms of insulation value for your money the batts take a bat to all challengers. The superattic system creates a continuous air and insulation barrier directly beneath the attic roof with no thermal bridging to compromise energy performance.

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. Rigid foam board also known as foam board or insulation board can be an excellent option for insulation. 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.