Best R Value For The Deep South Attic

Existing 3 4 inches of insulation.

Best r value for the deep south attic.

You will need a higher r value of insulation if you live in the northeast than if you live in southern california. As a benchmark one inch of solid wood has an r value of 1. R value is a standard unit of measurement for determining among many things how effective your insulation will be. Your home s age if your home is more than 10 year old you likely need more insulation.

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. Basics of faced fiberglass insulation from r 13 to r 19. Where you live different climates require different insulation r values. Owens corning 541799 r 10 attic stairway insulator for openingsup to 24 5 by 54 price on amazon.

Attic door insulation stair cover for openings up to 25 by 54 inch. Warmer climates only require an r 38 or higher or about 12 or more. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. Attic stairway insulator 25 x 54 x 11 r value of 14 5 fireproof attic stairs insulation cover.

Houses in a cold climate should have a minimum of r 49 in the attic which is equivalent to approximately 16 of fiberglass insulation. Higher r value numbers mean that the insulating material resists the cold or heat from the outside better. But newer homes in central and southern arizona are insulated to ratings of r 30 to r 38 while newer homes in northern arizona generally have attic insulation at r 60 because of colder winters. Recommended insulation levels for retrofitting existing wood framed buildings.