How To Install Skylight Through Attic

Use the hole as a reference only because the skylight location should be adjusted to match up with the rafters.

How to install skylight through attic. Next drive 4 deck screws through the roof from the inside to hold the skylight in place. Install the flashing from the roof of the home and be sure not to attempt this step of the project alone. If you re not familiar with basic carpentry practices or you are installing a large skylight that will require the removal of more than one roof rafter consult a professional builder. Cut the extensions at a 45 degree angle out from both corners of the skylight.

Because it s complex to build it adds about 1 500 to a professional installation. To install a skylight start by cutting a hole through the roof and ceiling from the outside that s large enough to hold the skylight. Cover the side flanges then the top in the same way. Perform a water test.

Go into the attic. Cover the bottom flange with a strip of membrane that extends 6 inches past the skylight s sides. Wrap the top part around the skylight s frame as shown and press the other part against the roof. A skylight installation happens in two phases.

If the skylight is mounted above an attic you ll also need to cut and frame a hole in the ceiling of the room below it and frame a light shaft through the attic. Install the skylight according to the model specifications. Depending on the circumstances such as roof pitch interior light shaft depth and shape and weather installations can take between half a day and three days. Then lay sheathing around the hole to prevent water leakages before inserting the skylight.

Drill a hole through the roof at about the center of the skylight.