How To Install Roofing Around Skylights

Attach the bottom sill of the flashing.

How to install roofing around skylights. Cover the side flanges then the top in the same way. Drive roofing or flashing nails horizontally into the skylight not vertically into the roof. Wrap the top part around the skylight s frame as shown and press the other part against the roof. Contractor larry landers demonstrates how to install roofing shingles around skylights.

The roofing felt and step flashing helps keep water from leaking around the skylight. For ease of installation bend the cut piece of flashing to about 85 degrees. When the piece is cut mark the height of the skylight add one inch and cut. Cut the metal flashing based on the length you determined but adding an extra two inches.

Cut the extensions at a 45 degree angle out from both corners of the skylight. Install the bottom flashing a single piece that wraps partway around the skylight and sits on top of the roof shingles figure 3. Nail it to the side edges of the frame or curb of the skylight. Next slip individual pieces of step flashing under the shingles.

Cover the bottom flange with a strip of membrane that extends 6 inches past the skylight s sides.