Instaling Attic Batt Insulation

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Instaling attic batt insulation.

Use our roll insulation calculator to estimate how much roll or batt insulation you ll need. Cut the insulation roll or batt to fit the length of the framing cavity if necessary. Old insulation is removed and the attic space is cleaned out. Install baffles against the roof sheathing between rafters so insulation does not seal up these avenues of air circulation.

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. Make sure you use an unfaced batt one without a paper or foil layer so the insulation does not trap moisture in the ceiling. We re using unfaced batts that are sized to friction fit into standard stud spaces either 16 in. Leave an extra 1 2 in.

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. You can install fiberglass batts yourself right over existing insulation but follow these precautions. 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.

If you re insulating framed walls make sure the insulation is the correct thickness for your wall studs. Place the insulation with the facing side down on a piece of scrap plywood. To view the next video in this series click here. Measure between joists if insulating a floor or attic or studs if insulating unfinished walls to find the correct width for the insulation.

This allows the termination of the batt in an area. Air movement is critical in the attic so moisture moves outside the home. Continue laying down the insulation making sure the batts are pressed tightly together at all edge and end joints. When it comes to insulating your attic there are really only two types of insulation worth considering fiberglass batts or blown in insulation.

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. Insulate your attic with fiberglass batts. Next any stored belongings or debris in the attic are removed and stored in a safe location that is out of the way. The basic installation steps are the same for walls ceilings floors and roofs in wood frame houses.