What type of insulation is typically used in attic spaces?

Blown-in cellulose or fiberglass insulation is commonly used in attic spaces due to several factors that make it particularly suitable for this application. This type of insulation can be easily installed in hard-to-reach areas, allowing for an effective barrier against heat transfer in the attic.

The loose-fill nature of blown-in cellulose or fiberglass allows it to conform to the various shapes and gaps present in attic spaces, ensuring complete coverage and minimization of thermal bridging. Moreover, cellulose insulation is often made from recycled paper products, which also contributes to environmental sustainability, while fiberglass is known for its moisture resistance and durability.

In comparison, other types of insulation might not be as effective or practical for attic installations. Foam board insulation and rigid mineral wool, while useful in certain applications, do not provide the same capability for filling irregular spaces and may require more cutting and fitting. Spray foam insulation is excellent for air sealing but can be more expensive and may not be necessary in all attic applications where blown-in insulation can effectively do the job. Thus, for attic spaces, the flexibility, ease of installation, and efficiency of blown-in cellulose or fiberglass make it the preferred choice.