Gene writes from Camden, New York: "How many batts of insulation r38 for attic floor 24x24 with 2x10 joists? Also, how many bats per package and how many packages will I need, or how many loose insulation bags for the attic as opposed to batts for the same r rating and how deep? Also, how many rolls r19 for walls 2x6 studs for 4 walls 8ft high x 24 ft long Kraft faced 16 inch centers."

Answer: The Owens Corning website has a page titled "How Much Insulation Do You Need?" that will help answer your questions. The page includes a calculator that will determine the number of packages needed for your project.