Instaling Attic Batt Insulation

Blown in insulation consists of bags of fiberglass or cellulose that are chopped up and blown in to the attic or wall from a machine.

Instaling attic batt insulation.

Cut batts to length by setting the top of the batt into the space and cutting against the bottom plate with a sharp utility knife. Place the insulation with the facing side down on a piece of scrap plywood. You can install fiberglass batts yourself right over existing insulation but follow these precautions. Insulate your attic with fiberglass batts.

Of length for a tighter fit. Cut the insulation roll or batt to fit the length of the framing cavity if necessary. Air movement is critical in the attic so moisture moves outside the home. Install baffles against the roof sheathing between rafters so insulation does not seal up these avenues of air circulation.

Measure between joists if insulating a floor or attic or studs if insulating unfinished walls to find the correct width for the insulation. Make sure you use an unfaced batt one without a paper or foil layer so the insulation does not trap moisture in the ceiling. This allows the termination of the batt in an area. Set a t square or metal straightedge over the insulation and press it down firmly.

Lay the batts across the ceiling joists covering the existing insulation. Installing attic insulation requires first preparing the surfaces around the attic entry to ensure that any contaminants in the attic aren t spread throughout the home. Continue laying down the insulation making sure the batts are pressed tightly together at all edge and end joints. Leave an extra 1 2 in.

Old insulation is removed and the attic space is cleaned out. We re using unfaced batts that are sized to friction fit into standard stud spaces either 16 in. While wearing dust mask and gloves carry r 38 batts of unfaced fiberglass insulation into the attic. Position the batt of insulation at the outer edge of the attic and roll the batt in the channel between the joists toward the center of the attic.

When it comes to insulating your attic there are really only two types of insulation worth considering fiberglass batts or blown in insulation. If you re insulating framed walls make sure the insulation is the correct thickness for your wall studs. To view the next video in this series click here. Use our roll insulation calculator to estimate how much roll or batt insulation you ll need.