Question: Do you make insulation for joists that are 12" on center?
Don writes from Mechanicsville, Virginia: "My floor joists are 12" on center. Do you make an insulation that will work that I don't have to cut every batt?"
Answer: Unfortunately, Owens Corning does not make an insulation product in that size. It may be time to invest in a good sharp knife. You can find some online that are said to make the job easier. I found several through Google when I searched for "insulation knife."



