How To Flash A Skylight On Roof

Once the metal flashings are ready place the pieces between the roof and skylight above the roof and under the skylight.

How to flash a skylight on roof.

Numbers 1 4 correspond to the 4 photos above. Drive roofing or flashing nails horizontally into the skylight not vertically into the roof. 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. Custom flashing around a triangle skylight on a metal roof.

Install the bottom flashing a single piece that wraps partway around the skylight and sits on top of the roof shingles figure 3. Number 5 shows how the final step counterflashing is integral to the skylight and covers the upper edges of the roof flashing. Properly installing a skylight requires detailed skylight flashing. Demonstrating how to properly flash a skylight.

Next slip individual pieces of step flashing under the shingles. Step 3 install the metal flashing. Then fold the tabs on all sides of the skylight and screw them down. 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.

Some skylights come with a kit and you don t have to build the aprons and install step fl. 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. Repeat to install the flashing to all sides of the skylight frame. 4 install bottom step flashing.