Closed cell foam consists of tightly packed cells that prevent air and moisture from entering, making it more rigid and stable than open cell foam.
Blown-in insulation typically lasts 20 to 30 years, but fiberglass and rockwool can last up to 50 years, though effectiveness may decrease over time.
R21 insulation is approximately 5.5 inches thick. This type of insulation is often used in walls and provides a higher R-value compared to standard insulation options, contributing to improved energy efficiency and thermal comfort in residential and commercial buildings.