Attic Insulation Over Old Insulation

Cut around these items it does not have to be.

Attic insulation over old insulation.

Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. Don t add faced insulation on top of your existing insulation because the vapor retarder in between layers leads to trapped moisture. Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used. Over the insulation install start at the farthest corner.

Wear a long sleeve shirt gloves eye protection and a dust mask. But just because your insulation is old doesn t mean it is dangerous. 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. One of the most common materials containing asbestos fibers is attic and wall insulation.

When adding roll the insulation perpendicular to the joists not parallel. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation. In older homes specifically asbestos may be found in many different materials from pipe insulation to flooring adhesive to roof shingles. Warnings for installing.

Insulation that gets dirty or logged with dust will be less effective. Use unfaced batts only to avoid moisture problems. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation. Supports braces and other obstacles.

Adding rolled batt or blown in insulation over existing insulation is not a problem. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. Batt insulation fiberglass or cellulose tends to fall down from crawl spaces or ceilings starting 15 to 20 years after installation. If the space between your joists is already full of insulation add new insulation on top of the joists running the new.

Start in a far corner and start rolling out the foil over the insulation. How to install attic insulation over existing insulation you can install fiberglass batts yourself right over existing insulation but follow these precautions. Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and. Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used.