What type of insulation is commonly used in residential construction?

Fiberglass insulation is commonly used in residential construction due to its effectiveness, cost efficiency, and ease of installation. It consists of fine glass fibers and is available in batts, rolls, and loose-fill forms, allowing for versatile application in walls, floors, and attics. Its properties provide good thermal resistance (R-value), which is crucial for energy efficiency in homes, helping to keep indoor temperatures stable and reduce heating and cooling costs.

While alternative types of insulation, such as spray foam and mineral wool, also have their advantages and are used in various applications, fiberglass insulation remains the most prevalent choice in the residential market. This is largely attributable to factors like widespread availability, familiarity among contractors, and competitive pricing compared to other insulation types. Celotex, while it is a brand of insulation products, does not represent a specific type of insulation that is universally applied in residential construction like fiberglass does.