Todd writes from Middlefield, Connecticut: "My 1400 SF home has an open attic above the living space that I would like to use to create a cathedral ceilinged area and loft floor. I need at least an R-30 for this ceiling insulation, but my roof is framed with 2x8's at 12" O.C. Can I get the required R-Value within this depth with any of your products??"

Answer: The highest R-value we have to recommend for a 2x8 cathedral ceiling is Kraft-faced R-21. Owens Corning does not make a product that will yield an R 30 in a 2x8 cavity.