Once you find your home s zone on this map you can use the below insulation r value chart to determine the minimum r value your insulation should have.
Minimum insulation for walls.
Add r5 insulative wall sheathing beneath the new siding.
Cavity fibrous or cellulose insulation can be installed at levels up to r 15 in a 2 inch x 4 inch wall and up to r 21 in a 2 inch x 6 inch wall.
Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces.
Framed wall insulation must meet or exceed r 13.
Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13.
Add r5 to r6 insulative wall sheathing beneath the new.
Minimum requirements r values identify insulation levels.
Residential requirements for insulation are divided by the location in the home.
Your climate zone indicates the recommended insulation levels for attics walls floors basements and crawl spaces.
For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6.
Wall insulation whenever exterior siding is removed on an.
The map above shows each region of the u s.
R values can be higher for foam insulation and other advanced insulation systems.
The r value your insulation needs depends on your local climate.
Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding and.