Attic Insulation Over Old Insulation

Insulation that gets dirty or logged with dust will be less effective.

Attic insulation over old 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. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used.

If the space between your joists is already full of insulation add new insulation on top of the joists running the new. Loose fill insulation may settle over time leading to air leaks. Wear a long sleeve shirt gloves eye protection and a dust mask. One of the most common materials containing asbestos fibers is attic and wall insulation.

Batt insulation fiberglass or cellulose tends to fall down from crawl spaces or ceilings starting 15 to 20 years after installation. In older homes specifically asbestos may be found in many different materials from pipe insulation to flooring adhesive to roof shingles. Use unfaced batts only to avoid moisture problems. Start in a far corner and start rolling out the foil over the insulation.

Over the insulation install start at the farthest corner. Supports braces and other obstacles. 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.

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. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation. How to install attic insulation over existing insulation you can install fiberglass batts yourself right over existing insulation but follow these precautions.

But just because your insulation is old doesn t mean it is dangerous. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. Cut around these items it does not have to be. When adding roll the insulation perpendicular to the joists not parallel.