Insulation
Spray Foam vs. Blown-In Cellulose vs. Fiberglass: Which Attic Insulation Fits San Diego Homes Best?
For most San Diego attics, blown-in cellulose or loose-fill fiberglass to R-38 to R-49, with air sealing first, is the best value. Spray foam wins when ducts run through the attic, the roofline is complex, or air leakage is severe.