The r value your insulation needs depends on your local climate.
Minimum insulation for walls.
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.
And the department of energy s corresponding climate zone.
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.
See the department of energy s doe ranges for recommended levels of insulation below.
Your climate zone indicates the recommended insulation levels for attics walls floors basements and crawl spaces.
Add r5 to r6 insulative wall sheathing beneath the new.
Wall insulation whenever exterior siding is removed on an.
Reduce exterior wall leaks by taping the joints of exterior sheathing and caulking and sealing exterior walls.
Residential requirements for insulation are divided by the location in the home.
R values can be higher for foam insulation and other advanced insulation systems.
The map above shows each region of the u s.
For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6.
Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding and.
Minimum requirements r values identify insulation levels.
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.