Spray foam insulation is ideal for crawl spaces due to its water-repellent properties and resistance to biological growth.
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.
If your insulation becomes wet, it's crucial to remove and replace it promptly. Wet insulation can significantly lose its effectiveness and may also pose health risks due to potential mold and mildew growth.