It's installed with a blower machine similar to that used to install blown fiberglass insulation. The cellulose insulation blown into attics is a dry mix of shredded newspaper rated at R-3.8 per in. A water-based binder and adhesive keeps this type of cellulose insulation in place as the insulation dries out. To insulate walls in new construction "wet-spray" cellulose insulation can be blown between studs. Since it's made from a waste material, cellulose is considered one of the greenest insulations available. To install the material, each block is cut in half and pushed into a combination shredder/blower machine that feeds a long, flexible installation hose.Ĭellulose insulation is made from old newspapers that are shredded and then treated to resist combustion and mold. It comes in dense blocks that are wrapped in plastic. Unlike in wall or floor applications, the attic provides enough room for a thick layer of insulation, so the "fluffy" nature of blown insulation isn't a disadvantage.īlown fiberglass insulation (aka " loose-fill" fiberglass insulation) has an R-value of about 3.4 per in. The advantage of blown (or blow-in) insulation isn't greater R-value it's the fact that blow-in insulation can be installed faster, more uniformly and with less traffic through the house. When new attic insulation is installed, it's usually blown into the attic. If the attic in your house is insulated with fiberglass batts, there's a good chance that this insulation can stay in place beneath a deeper layer of new insulation. In many older houses, the attic is insulated with fiberglass batts that are placed between ceiling joists. Call or contact us online for a Free Insulation Estimate & Inspection and save roughly 25% to 45% on your home energy bills. We are a home energy services company with the expertise in home insulation in Michigan, MI.
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