Encyclopedia & FAQ's

DIY Frequently Asked Questions / What R-value should I use?

The Department of Energy recommends R-values based on the type of fuel used and where you live. Generally, attics in homes heated by gas or oil in most southern locations should use R-19. For an electrically heated home in the same area, the recommendation is R-30. The minimum recommendation for homes in the coldest climates, regardless of heating method, is R-49.