Attic Insulation Over Old Insulation

Start in a far corner and start rolling out the foil over the insulation.

Attic insulation over old insulation. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation. Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used. Adding rolled batt or blown in insulation over existing insulation is not a problem. Loose fill insulation may settle over time leading to air leaks.

Don t add faced insulation on top of your existing insulation because the vapor retarder in between layers leads to trapped moisture. Batt insulation fiberglass or cellulose tends to fall down from crawl spaces or ceilings starting 15 to 20 years after installation. Over the insulation install start at the farthest corner. How to install attic insulation over existing insulation you can install fiberglass batts yourself right over existing insulation but follow these precautions.

Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. Supports braces and other obstacles. 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 that gets dirty or logged with dust will be less effective. Alignment obstacles in the attic. 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. If the space between your joists is already full of insulation add new insulation on top of the joists running the new.

Use unfaced batts only to avoid moisture problems. Warnings for installing. 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.

Cut around these items it does not have to be. In older homes specifically asbestos may be found in many different materials from pipe insulation to flooring adhesive to roof shingles. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation. Wear a long sleeve shirt gloves eye protection and a dust mask.