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.

It is essential when installing a skylight on a flat roof with curb flashing that is in one piece. This is what the curb flashing looks like before the membrane is attached. Flat roof skylights should have one continuos piece of metal flashing around them. In the case of epdm rubber the flashing on the right will not work.

If you have to replace shingles around a skylight examine the old flashing. 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. Use a single piece of flashing in the front and step flashing up the sides of the curb. Preparing the flashing for a new rubber roof.

Velux standard flashing has no option to match roof colour. 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. 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. Welding the corners where the flashing meets the curb is necessary.

Skyspan custom pitch adaptor flashings for velux pitched roof skylights and for velux flat roof skylights are available. Install rigid insulation inside the light tunnel to prevent condensation and heat loss. It is critical to ensure that the roof membrane is properly attached to the flashing of the skylight. Epdm uses contact cement to glue the rubber to the metal.

One solid piece of flashing. We had to tear out all of the old flashing. Velux standard flashing is available in one colour only. Step 6 install flashing and insulation.

When a skylight is installed on a flat roof then the flashing around it should be one solid piece. On this project adam was called out to inspect leaks around a skylight. The flashing on these skylights are one piece. Fit and install the next row of shingles leaving about 1 2 in.

The corners of the flashing should be welded. That is one of the more difficult areas to accomplish and to make sure it would last a long time without leaking. The top head flashing is one piece that wraps around the sides. This fabricated piece has soldered and sealed seams and corners.

Skylights meant for a pitch roof will have step flashing. Proper flashing of a skylight is critical. The skyspan pitch adaptor flashing lifts the skylight on the top side so that it s pitched greater than 15.