Which type of insulation is most commonly used in residential construction?

Fiberglass insulation is the most commonly used type of insulation in residential construction due to its favorable characteristics. It is made from fine strands of glass and is known for its effectiveness in reducing heat transfer, which is essential for maintaining comfortable indoor temperatures. Fiberglass insulation comes in various forms, including batts, rolls, and loose-fill, allowing for versatility in application across different areas of a home, such as walls, attics, and crawl spaces.

This material is also relatively cost-effective compared to other insulation types, making it a popular choice among builders and homeowners. Its resistance to moisture and fire adds to its benefits, enhancing building safety and longevity. Moreover, fiberglass insulation is non-combustible and does not absorb water, which helps prevent mold growth and structural damage.

While other insulation types, like spray foam, cellulose, and mineral wool, have their own advantages and specific use cases, fiberglass remains the predominant choice due to its balance of performance, availability, and cost-effectiveness in the residential construction market.