Flashing A Skylight On A Flat Roof

Install sheet metal flashing over a water and ice barrier around the perimeter of the skylight.

Flashing a skylight on a flat roof.

Welding the corners where the flashing meets the curb is necessary. Skylights meant for a pitch roof will have step flashing. This fabricated piece has soldered and sealed seams and corners. Preparing the flashing for a new rubber roof.

Velux standard flashing is available in one colour only. Skylights are typically manufactured with their own integral metal flashing a flat metal flange that extends from the body of the skylight and tucks underneath the roof shingles. Skyspan custom pitch adaptor flashings for velux pitched roof skylights and for velux flat roof skylights are available. The corners of the flashing should be welded.

The top head flashing is one piece that wraps around the sides. Fit and install the next row of shingles leaving about 1 2 in. That is one of the more difficult areas to accomplish and to make sure it would last a long time without leaking. It is critical to ensure that the roof membrane is properly attached to the flashing of the skylight.

They are meant to be installed on a flat roof. On this project adam was called out to inspect leaks around a skylight. When a skylight is installed on a flat roof there will come a time when water is pooling around the curb flashing of the skylight. Epdm uses contact cement to glue the rubber to the metal.

Use a single piece of flashing in the front and step flashing up the sides of the curb. In the case of epdm rubber the flashing on the right will not work. In some cases a skylight is set up on a curb that is flashed with continuous flashing along the base step flashing up the sides and saddle flashing across the top. We had to tear out all of the old flashing.

Flat roof skylights should have one continuos piece of metal flashing around them. The skyspan pitch adaptor flashing lifts the skylight on the top side so that it s pitched greater than 15. This is what the curb flashing looks like before the membrane is attached. That s when the rubber roof gets attached to the flashing with adhesives.

Proper flashing of a skylight is critical. If you have to replace shingles around a skylight examine the old flashing. It is essential when installing a skylight on a flat roof with curb flashing that is in one piece. Install rigid insulation inside the light tunnel to prevent condensation and heat loss.

Just as crucial for a watertight seal the flashing must also be clean from debris or tar. When a skylight is installed on a flat roof then the flashing around it should be one solid piece. One solid piece of flashing.