How Thick Is R28 Batt?
How Thick Is R28 Batt? Typical R-30 fiberglass insulation is 10-inches-thick. What is the thickness of batt insulation? Thickness (inches) R-Value Cost (cents/sq. ft.) 3 1/2 11 12-16 3 5/8 13 15-20 3 1/2 (high density) 15 34-40 6 to 6 1/4 19 27-34 How thick is a fiberglass batt? The standard R-19 fiberglass batt