Installation Guide

Insulation’s effectiveness is measured in R-value, which is the ability
to resist heat transfer. The higher the R-value, the better the insulation
properties are, saving you more money. Use the map above to determine
the suggested R-value for your home. Actual R-value code requirements
may be different than those suggested above. Refer to the current building code for
your location to determine the code requirement for your climate zone.
2
Zone
Add Insulation to Attic
Uninsulated Attic Existing 3–4 Inches of Insulation Floor
1 R-30 to R-49 R-25 to R-30 R-13
2 R-30 to R-60 R-25 to R-38 R-13 to R-19
3 R-30 to R-60 R-25 to R-38 R-19 to R-25
4 R-38 to R-60 R-38 R-25 to R-30
5 to 8 R-49 to R-60 R-38 to R-49 R-25 to R-30
Wall Insulation: Whenever exterior siding is removed on an:
Uninsulated wood-frame wall:
• Drill holes in the sheathing and blow insulation into the empty wall cavity before
installing the new siding, and
• Zones 3–4: Add R-5 insulative wall sheathing beneath the new siding
• Zones 5–8: Add R-5 to R-6 insulative wall sheathing beneath the new siding.
Insulated wood-frame wall:
• For Zones 4 to 8: Add R-5 insulative sheathing before installing the new siding.
DETERMINE YOUR INSULATION NEEDS
Locate your zone