See the department of energy s doe ranges for recommended levels of insulation below.
Minimum insulation for walls.
Minimum requirements r values identify insulation levels.
Wall insulation whenever exterior siding is removed on an.
Residential requirements for insulation are divided by the location in the home.
Add r5 to r6 insulative wall sheathing beneath the new.
The r value your insulation needs depends on your local climate.
Add r5 insulative wall sheathing beneath the new siding.
Your climate zone indicates the recommended insulation levels for attics walls floors basements and crawl spaces.
And the department of energy s corresponding climate zone.
R values can be higher for foam insulation and other advanced insulation systems.
Reduce exterior wall leaks by taping the joints of exterior sheathing and caulking and sealing exterior walls.
Framed wall insulation must meet or exceed r 13.
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.
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.
The map above shows each region of the u s.
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.