How much insulation do I need in the attic?

The amount of insulation needed in your attic varies according to your home’s construction, the type of insulation you have, and the average temperature in your area. To get an accurate measure of how much insulation you have, you can place insulation scraps underneath the joists and measure the thickness from the top of the joists to the ceiling.

How much insulation do I need in my ceiling?

The insulation requirements for the attic vary depending on the type of roofing (see below) and the amount of attic ventilation. The National Renewable Energy Laboratory (NREL) recommends adding insulation to your attic so the attic temperature is between 55-65 degrees. This translates to R-value insulation ratings between 11-15. To learn more about determining an appropriate amount of insulation for your home, call a licensed professional roofing contractor.

How much insulation do I need in the attic of a mobile home?

The amount of insulation needed in a mobile home attic depends on the R-value of the material used and the average temperature in the attic during the year. In hot, humid climates, more insulation is needed to keep the attic cool and comfortable.

How much insulation do I need in the attic of a garage?

A garage is an area that’s used for storing your vehicles and other belongings, so it’s understandably not the first place you’d think to add insulation. However, you should still consider adding insulation in the attic underneath your garage. If your garage is unfinished, a layer of insulation can be added to the floor. If your garage has a ceiling, then you’ll need to add insulation to the rafters, joists, and/or insulation in the attic

How much insulation do I need in my attic?

You can get a ballpark figure for how much insulation you need in your attic by looking at the square footage of your attic space and the R-value of your roofing shingles. If you don’t know the square footage of your attic, it’s a good idea to measure it anyway. An unfinished attic, such as the one shown in the image below, typically has a smaller square footage than an attic with the added insulation and drywall ceiling.