How To Install Drywall Over Rigid Insulation In Attic Skylights

Paint the drywall with latex paint to serve as the vapor barrier.

How to install drywall over rigid insulation in attic skylights.

There are several ways to insulate skylight passages. Cut the insulation with a utility. If the air barrier to be used is sprayed polyurethane foam spf insulation remove any old insulation and fill the cavities of the skylight framing with the spf. Start at one corner of the attic and lay the piece of insulation lengthwise like a piece of drywall.

Set first piece of rigid insulation. The unfaced insulation can be secured to the framing with staples. Tape and seal all joints in the rigid insulation or drywall. The most common way to hang drywall over rigid foam insulation is to glue and screw it into place.

Drywall shafts can allow heat to escape. Complete any needed insulation upgrading or installation prior to drywalling. Mark the insulation where it lines up with the center of the rafter closest to the farthest edge. Caulk the drywall and rigid foam to the framing at all edges.

Nail or screw the rigid insulation or drywall in place over the caulked framing as shown in the description tab. 1 tape each seam with housewrap tape. As long as the rigid foam layer is thick enough to meet at least minimum code requirements for walls exceeding minimum code values is even better this is an excellent approach. Seal any seams in the rigid foam with caulk tape or foam.

If you are placing drywall over an existing wall remove all the baseboards and note the locations of the nail holes in the wall surface. Mark the location of all wall studs on the ceiling and the floor for your vertical nailing pattern reference. Nail rigid foam in place over the studs and fill the cavities with blown cellulose or blown fiberglass insulation. Once the attic is prepared then start to install the insulation.