Best R Value For The Deep South Attic

In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7.

Best r value for the deep south attic.

R value is a standard unit of measurement for determining among many things how effective your insulation will be. Attic door insulation stair cover for openings up to 25 by 54 inch. Existing 3 4 inches of insulation. Add insulation to attic.

Houses in a cold climate should have a minimum of r 49 in the attic which is equivalent to approximately 16 of fiberglass insulation. Warmer climates only require an r 38 or higher or about 12 or more. Owens corning 541799 r 10 attic stairway insulator for openingsup to 24 5 by 54 price on amazon. You will need a higher r value of insulation if you live in the northeast than if you live in southern california.

Basics of faced fiberglass insulation from r 13 to r 19. Attic stairway insulator 25 x 54 x 11 r value of 14 5 fireproof attic stairs insulation cover. Recommended insulation levels for retrofitting existing wood framed buildings. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another.

Higher r value numbers mean that the insulating material resists the cold or heat from the outside better. The r refers to absolute thermal resistance. Where you live different climates require different insulation r values. As a benchmark one inch of solid wood has an r value of 1.