Homeowners can save a lot of money each year by installing blown-in attic insulation. Even if your home is already insulated, reinsulating is a great way to maximize your home's energy efficiency and stop heat transfer from your attic. How much you save depends on the size of your property and its insulation situation. Blown-in attic insulation can reduce the heat transferred through your roof by up to 70%. This means you'll use less energy to keep yourself warm in winter and cool in summer because there will be less escaping through the roof.