What type of insulation is most commonly used in walls and ceilings?

Fiberglass batts are the most commonly used insulation material in walls and ceilings due to their effective thermal insulating properties, cost-efficiency, and ease of installation. They come pre-cut to fit standard stud spaces, which simplifies the installation process for both professionals and DIY enthusiasts. The material itself is made of fine glass fibers that trap air, providing an insulating barrier that helps maintain indoor temperatures, reduce heating and cooling costs, and improve energy efficiency in homes and buildings.

In terms of popularity, fiberglass batts offer a combination of affordability and performance that appeals to a wide range of construction and renovation projects. While other types of insulation like spray foam and cellulose may have specific benefits such as air sealing or environmentally friendly components, they are less commonly used for general wall and ceiling insulation when compared to fiberglass batts. Mineral wool, while effective for soundproofing and fire resistance, does not have the same level of widespread use as fiberglass batts in residential applications. Overall, fiberglass batts remain a go-to choice for many builders and contractors in the construction industry.