Attic Batt Insulation R Value

Houses in a cold climate should have a minimum of r 49 in the attic which is equivalent to approximately 16 of fiberglass insulation.

Attic batt insulation r value.

Effective r values for batt insulation derived from ashrae document heat transmission coefficients for walls roofs ceilings and floors 1996 good fair poor measured batt thickness inches effective r value 2 5 per inch effective r value 1 8 per inch effective r value 0 7 per inch. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Warmer climates only require an r 38 or higher or about 12 or more. Foam in place insulation can be blown into walls on attic surfaces or under floors to insulate.

As a benchmark one inch of solid wood has an r value of 1. Achieving greater r values in exterior walls. For homes that are situated in cold climates homeowners need to ensure that they have a minimum of r 49 in their attics this is equivalent to about 16 inches of fibreglass insulation. In comparison an inch of blown.

If your home is in a warmer climate you require an r 38 or higher or about 12 more. Recommended home insulation r values. Thermafiber residential mineral wool insulation commercial grade at home thermafiber residential mineral wool blankets are ideal for insulating walls floor ceilings and attic spaces in homes. Recycled glass or sand that s melted and spun into fibers.

The higher the r value the better the thermal performance of the insulation. Insulation level are specified by r value. These products provide a high r value inch excellent sound attenuation characteristics and outstanding fire performance.