Insulation at the Attic

Insulating your home can be one of the most cost-effective energy efficiency measures you can take. In addition, well-insulated homes can be more comfortable to live in and the resale value may be higher than an equal but poorly insulated home. There are many options to choose from when considering adding insulation to a home and understanding some basic concepts about insulation can help you make the right decision for your situation.

R-Value is a measure of insulation's ability to resist heat flow. The higher the R-Value, the better the thermal performance of the insulation. The recommended level for most attics is to insulate to R-38 or about 10 to 14 inches, depending on insulation type. According to the U.S. Department of Energy, it's recommended that attics have an R-38 to R-49, or about 12” to 15” of fiberglass or cellulose insulation. If you plan on adding insulation to your attic and perform this yourself, you could use unfaced insulation when adding more insulation to an attic that already has some insulation, laying the rolls or batts at right angles to the floor joists.

Here is a link to NAIMA (North American Insulation Manufacturers Association) where you will find helful information.

The photos here show a well insulated attic in a Parker Colorado home using blown fiberglass insulation at the depth of 14-16 inches.


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