Attic Insulation Over Old Insulation

Loose fill insulation may settle over time leading to air leaks.

Attic insulation over old insulation.

One of the most common materials containing asbestos fibers is attic and wall insulation. Over the insulation install start at the farthest corner. When adding roll the insulation perpendicular to the joists not parallel. Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used.

More insulation installation tricks and tips work from the perimeter of the attic toward the door or hatch so that you don t trample all over the insulation you just. Supports braces and other obstacles. How to install attic insulation over existing insulation you can install fiberglass batts yourself right over existing insulation but follow these precautions. Use unfaced batts only to avoid moisture problems.

Alignment obstacles in the attic. Wear a long sleeve shirt gloves eye protection and a dust mask. In older homes specifically asbestos may be found in many different materials from pipe insulation to flooring adhesive to roof shingles. Warnings for installing.

Don t add faced insulation on top of your existing insulation because the vapor retarder in between layers leads to trapped moisture. Do not tack down any rolled insulation. Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used. Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and.

Adding rolled batt or blown in insulation over existing insulation is not a problem. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation. Cut around these items it does not have to be. But just because your insulation is old doesn t mean it is dangerous.

If the space between your joists is already full of insulation add new insulation on top of the joists running the new. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. Start in a far corner and start rolling out the foil over the insulation. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation.