Attic Insulation Over Old Insulation

Wear a long sleeve shirt gloves eye protection and a dust mask.

Attic insulation over old insulation.

Start in a far corner and start rolling out the foil over the insulation. Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used. 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.

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. Warnings for installing. If the space between your joists is already full of insulation add new insulation on top of the joists running the new.

Alignment obstacles in the attic. Batt insulation fiberglass or cellulose tends to fall down from crawl spaces or ceilings starting 15 to 20 years after installation. Cut around these items it does not have to be. 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.

Don t add faced insulation on top of your existing insulation because the vapor retarder in between layers leads to trapped moisture. When adding roll the insulation perpendicular to the joists not parallel. How to install attic insulation over existing insulation you can install fiberglass batts yourself right over existing insulation but follow these precautions. Insulation that gets dirty or logged with dust will be less effective.

Use unfaced batts only to avoid moisture problems. Loose fill insulation may settle over time leading to air leaks. 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.

Supports braces and other obstacles. One of the most common materials containing asbestos fibers is attic and wall insulation. Over the insulation install start at the farthest corner. Do not tack down any rolled insulation.