Attic insulation is a key element to saving energy and maintaining comfort in your home. It helps your conditioned air stay in your rooms instead of escaping through the ceilings, and it also blocks hot outdoor air from entering your home. It’s also helpful in soundproofing if you live near a busy road, construction or other sources of noise.
There are many different types of attic insulation, but four are commonly used in attics: fiberglass batts, cellulose, loose-fill fiberglass and spray foam. Each is rated according to its R-value, which measures its ability to resist the transfer of heat.
R-value recommendations vary according to where you live. Check out the map to see your R-value recommendation based on your climate zone.
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Blanket insulation, usually made from fiberglass, is available in medium- and high-density versions. It’s inexpensive and easy to install yourself, but be sure to wear a face mask and gloves since fiberglass is a lung and skin irritant.
The higher-density blanket will have a better R-value than the lower-density version. Both are best for homes with a high roof pitch.
Cellulose is very dense and has an excellent R-value of 3.5 per inch. It does a great job of blocking heat from migrating into the living spaces, and it’s ideal for homes with frost problems in the winter. Pros typically use wet-spray cellulose, which adds water to control the dust and increase the R-value.
Sprayed foam, which is expensive but has the highest R-value of 6.2 per inch, fills the tiny gaps and cracks in attics and walls, making it the most effective type of insulation for stopping air leakage. It is a dangerous substance and you must wear a respirator, goggles and gloves when working with it, so calling a professional is usually the best option.
Green Earth Spray Foam
1891 Prospect Church Rd Lawrenceville, GA 30043