Debbie writes from Sarasota, Florida: "IS AN R-VALUE OF 49 NECESSARY FOR A HOUSE IN FLORIDA? I HAVE PRACTICALLY NO INSULATION IN MY ATTIC. WHAT DO I NEED TO ACHIEVE THIS?"

Answer: According to the U.S. Department of Energy, an existing home in your Zip Code area needs a minimum R-38 (12" of fiberglass insulation). R-49 is about 15.5 inches of Owens Corning PINK Fiberglas™ batts layered together. The thickest single product the company makes is R-38.