Skylight Insulation Attic

A finished attic should be insulated much like the rest of the house with insulation in the walls and ceiling.

Skylight insulation attic.

Skylights are now sold as kits that usually include the necessary flashing materials as well. If a skylight is installed in the roof over an attic a shaft must be built to connect the skylight with the ceiling underneath. Because the shaft walls separate the interior of the house from an unconditioned attic it s essential that they be well insulated. Materials for a skylight are fairly basic especially in the attic.

If a skylight shaft contains an air permeable insulation such as cellulose or fiberglass the insulation should be enclosed on the attic side to create an air barrier. However these kits are for use with asphalt shingles. Repair skylight flashing from the roof exterior and replace any damaged framing as necessary. These range in price from 150 500 for a 2 x 4 ft sized skylight.

A different type of insulation will need to be installed along the skylight shaft walls one that will maintain both the full alignment or contact with the back side of the sheathing for the height of the skylight shaft walls and at least. How to insulate and air seal skylight shaft walls. Unsealed attics are often insulated along the attic floor with blown fiberglass or cellulose insulation. Skylight shaft walls are sometimes vertical but more typically they are sloped to create a splayed opening.

That means insulating the attic floor only not the walls and having vents in the roof. Inspect the existing skylight for signs of water leakage such as water stains and rot. With a finished attic insulation must help keep the attic areas comfortable. How to insulate a finished attic.