Adding blown-in insulation to your attic space is a popular way to improve energy efficiency and reduce heating and cooling ...

Mineral wool batts are about 25 percent more expensive than fiberglass. Shop Now Many builders consider spray foam to be the gold standard for attic insulation. Inch-for-inch, it offers a higher R ...

In balmy South Florida, for example, installing one layer of R-30 fiberglass insulation in an attic is considered sufficient. But in wintry Wisconsin, you may want to add R-60 insulation to a ...