How To Flash A Skylight On Roof

Custom flashing around a triangle skylight on a metal roof.

How to flash a skylight on roof.

Numbers 1 4 correspond to the 4 photos above. Then fold the tabs on all sides of the skylight and screw them down. Some skylights come with a kit and you don t have to build the aprons and install step fl. Custom flashing around a triangle skylight on a metal roof.

Next slip individual pieces of step flashing under the shingles. Secure by nailing the flashing to the roof. Demonstrating how to properly flash a skylight. So notorious that a major manufacturer velux developed flashing kits that could be shipped with the skylight to eliminate origami gone wrong on the roof.

Flashing is the key to a skylight that won t leak water into the roof cutting a hole in a perfectly water tight roof is asking for trouble and true to form skylights are notorious for leaking. Number 5 shows how the final step counterflashing is integral to the skylight and covers the upper edges of the roof flashing. 4 install bottom step flashing. Install the bottom flashing a single piece that wraps partway around the skylight and sits on top of the roof shingles figure 3.

Finally the top flashing gets interwoven with the underlayment that covers the roof surface and the roofing material is added back around the skylight with a 2 4 inch gap between the top of the flashing and the bottom of the shingles. Step 3 install the metal flashing. This skylight shows the correct flashing technique to make it waterproof. Drive roofing or flashing nails horizontally into the skylight not vertically into the roof.