Zone 4: R-38 to R-60
Zone 5: R-49 to R-60
Zone 1 Includes:
Hawaii, Guam, Puerto Rico and the Virgin Islands
Alaska in Zone 7 except for the following Boroughs in Zone 8:
Bethel, Dillingham, Fairbanks, N. Star, Nome, Noth Slope, Northwest Artis, Southwest Fairbanks, Wade Hampton, Yukon-Koyukuk
ROOFING SIDING GUTTERS INSULATION
The amount of insulation recommended for your home will vary depending on a number of factors:
WHERE YOU LIVE
Different climates require different insulation R-values. You will need a higher R-value of insulation if you live in the Northeast than if you live in Southern California.
YOUR HOME'S AGE
If your home is more than 10 years old, you will likely need more insulation.
HOW MUCH INSULATION SHOULD YOU INSTALL?
* Recommended Department of Energy attic insulation levels for commonly used fiberglass, mineral wool, and cellulose insulation assuming about R-3 per inch.
MOST SOUTHERN CLIMATES
13" - 14" DEEP
COMPLETLY FILLED JOIST
6" - 7" DEEP
4" - 5" DEEP
16" - 18" DEEP
If you think you’re among the 90% of US homes that are under-insulated, performing a simple insulation inspection will help you determine your insulation needs. Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills —plus, prevent major issues like ice dams in the winter.