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.
How to flash a skylight on roof.
Install the bottom flashing a single piece that wraps partway around the skylight and sits on top of the roof shingles figure 3.
Custom flashing around a triangle skylight on a metal roof.
Number 5 shows how the final step counterflashing is integral to the skylight and covers the upper edges of the roof flashing.
Demonstrating how to properly flash a skylight.
Properly installing a skylight requires detailed skylight flashing.
Repeat to install the flashing to all sides of the skylight frame.
Numbers 1 4 correspond to the 4 photos above.
Next slip individual pieces of step flashing under the shingles.
Custom flashing around a triangle skylight on a metal roof.
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.
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.
Secure by nailing the flashing to the roof.
Some skylights come with a kit and you don t have to build the aprons and install step fl.
Step 3 install the metal flashing.
Drive roofing or flashing nails horizontally into the skylight not vertically into the roof.
4 install bottom step flashing.