Loose Insulation in the Attic

Identification

• According to the U.S. Department of Energy, loose-fill insulation is commonly used to add insulation to residential attics. While batt insulation is also frequently used, it is typically more expensive than loose-fill insulation and provides less coverage than loose-fill. Small particles of fiber or foam make up loose-fill insulation, all of which are made from recycled materials. Other materials such as polystyrene beads are also used to make loose-fill insulation, but are less common than other materials.

Pre-Installation

• Your loose-fill insulation will be most effective if you perform a few tasks before installation. Since most types of insulation do not impede air flow, it is important to seal all air leaks. Around vents, ductwork, soffits and ceilings are common areas gaps may occur. Seal any gaps with caulk and seal around your chimney with high-temperature caulk. If you have large gaps in your attic, you can use foam board insulation that can be cut to fit the area you are sealing. Check for signs of water leaks such as stains on the ceiling or marks on the floor. Repair any water leaks before installing your loose-fill insulation, as moisture reduces the effectiveness of insulation.

Installation

• Loose-fill insulation is usually blown into attic spaces using special equipment. According to the U.S. Department of Energy, the two-hole method is most often used to install loose-fill insulation. This procedure is performed by drilling two holes in the exterior walls and blowing the insulation into the attic through the holes. After insulation is installed, the holes must be sealed.

Considerations

• While homeowners can install loose-fill insulation themselves, it is usually best to hire a professional insulation installer. Insulation works best when it is installed using the proper density and the entire attic is covered. Obtain several written estimates from licensed contractors in your area for comparison. If you wish to install insulation yourself, you must inquire about local building codes and rent special equipment to blow the insulation into the attic.