Attic Insulation Over Old Insulation

Adding rolled batt or blown in insulation over existing insulation is not a problem.

Attic insulation over old insulation. If the space between your joists is already full of insulation add new insulation on top of the joists running the new. Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used. Start in a far corner and start rolling out the foil over the insulation. 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. 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. In older homes specifically asbestos may be found in many different materials from pipe insulation to flooring adhesive to roof shingles.

Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. 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. Insulation that gets dirty or logged with dust will be less effective. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all.

But just because your insulation is old doesn t mean it is dangerous. Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation. Loose fill insulation may settle over time leading to air leaks.

Alignment obstacles in the attic. Don t add faced insulation on top of your existing insulation because the vapor retarder in between layers leads to trapped moisture. Over the insulation install start at the farthest corner. One of the most common materials containing asbestos fibers is attic and wall insulation.

Warnings for installing. Do not tack down any rolled insulation. Cut around these items it does not have to be. Wear a long sleeve shirt gloves eye protection and a dust mask.