The depth of insulation is 2 feet - it was blown in. I also insulated the garage doors with styrofoam panels attained at copyright (There's a specific package for this). Earlier, the garage and lani were not insulated. Yet another sort of active solar technology is concentrated solar energy or https://solarcompanyinsriganganag65812.ourcodeblog.com/35116330/not-known-factual-statements-about-solar-company