Spray foam is typically more expensive than fiberglass insulation, but the extra cost is worth it thanks to the superior air sealing capabilities, high R-values, and long life span. Is there a ...

The average cost to install insulation on a flat roof ... of Energy suggests a minimum of 11 inches of rock wool or fiberglass insulation or eight inches of cellulose. If your insulation was ...

Cost and Availability of Mineral Wool Insulation On a square-foot basis, mineral wool batts cost more than fiberglass batts.