It depends on use case and climate zone. Unheated storage can get by with R-6 to R-13. Heated shops typically need R-19 to R-25. Livable spaces usually require R-25 to R-38 or more, depending on your local energy code.
It depends on use case and climate zone. Unheated storage can get by with R-6 to R-13. Heated shops typically need R-19 to R-25. Livable spaces usually require R-25 to R-38 or more, depending on your local energy code.