Attic insulation is a key element of your home’s energy efficiency, comfort and air quality. It reduces the strain on your heating and cooling system by regulating your house’s temperature and preventing heat loss, and it also provides soundproofing. However, the effectiveness of attic insulation depends on the type and R-value of insulation used, as well as how it is installed and maintained. Poorly-installed or incorrectly-matched insulation can cause gaps, cracks and leaks to form. This can lead to the loss of valuable insulating materials and create a less-efficient, unhealthy home environment.

Foam Expert Group’s Guide to Efficient Attic Insulation Solutions

The most common type of attic insulation is fiberglass batting or blanket insulation, which is available in many different thicknesses and R-values. This insulation is precut to fit between attic joists and rafters, and it may include an air and vapor barrier on one side for improved performance. It is inexpensive, easy to install, and moisture-resistant when paired with a vapor barrier.

Loose-fill or blown-in insulation is more effective at attic spaces than blanket and fiberglass insulation because it fills gaps and holes better. It can be made from cellulose, recycled paper, fiberglass or mineral wool and is commonly installed using a blowing machine. This insulation is highly effective at keeping heat in or out, and it also resists moisture and pests.

Spray foam insulation is another great attic insulation option, but it’s more expensive and requires professional installation because of the chemical handling required. This type of insulation is a two-part liquid that expands to a foam upon curing, and it can be sprayed into every attic space, gap and crevice, ensuring complete coverage and minimizing air leaks. Closed-cell spray foam has a high R-value per inch, and it is also moisture-resistant.

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