Fiber glass and mineral wool dramatically reduce installation time, for tremendous labor savings. A 3,500 square-foot home can be completely insulated in a day by one trained installer using fiber glass or mineral wool (rock and slag wool) batts.

And unlike spray polyurethane foam and cellulose, which can take up to 72 hours to cure and dry before drywall installation can begin, they require almost no downtime or jobsite evacution.