Attic Efficiency is the leading insulation contractor in Walnut Creek, CA, & the surrounding areas. Attic Efficiency specializes in Attic Insulation Installation, Attic Insulation Replacement, Crawl Space Insulation Installation, Crawl Space Insulation Replacement, & Crawl Space Cleaning. At Attic Efficiency, we fit the bill. As a licensed & insured business in the San Francisco Bay Area, we’ll make you feel confident that your home is in the expert hands of professional contractors.