Flashing A Skylight In A Cedar Roof

Most residential skylights sit on a raised curb made watertight with metal flashing.

Flashing a skylight in a cedar roof.

Asphalt shingles are more fire resistant than cedar shingles too although some additives may help with that. When it comes time to replace your cedar roof and are considering a switch to asphalt shingles there are some differences to consider. The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak. Additional flashing pieces may be required for shakes or other thick roofing materials.

Velux skylight flashing kits are designed to shed water without relying on sealants that can break down over time. Copper is a popular flashing material with wood roofs although some experts caution against using copper in direct contact with red cedar or its runoff since the soluble tannins in cedar can etch copper and in extreme cases lead to perforation of the flashing within 10 to 20 years see also flashing wall details copper and metal. We offer a variety of skylight flashing systems to ensure a weathertight fit for virtually all roof types and slopes. Step flashing is laced over each course of asphalt shingles cedar shakes and shingles and most alternative steep sloped roofing materials no more than 1 above the weather exposure of the roofing.

If it s carefully removed when the old roof is torn off it should be reusable. Velux standard flashing has no option to match roof colour. The purpose of all roof flashing including skylight flashing is to keep as much of the moisture as possible on the surface of the roofing material. The flashing kit has three components.

The installer starts at the bottom of the skylight with the sill flashing. Asphalt shingles are rated for 30. A crucial part of our complete system. Velux standard flashing is available in one colour only.

The skyspan pitch adaptor flashing lifts the skylight on the top side so that it s pitched greater than 15. Edl step flashing edl step flashing provides a weathertight seal for deck mounted skylights or roof windows installed on roofs with thin roofing materials such as asphalt or fiberglass shingles slate cedar shingles and shakes. Properly installing a skylight requires detailed skylight flashing. The life expectancy of either material is a huge consideration.

After a row of roofing material is installed over the bottom edge of the underlayment the sill flashing is placed at the bottom of the skylight. Some skylights come with a kit and you don t have to build the aprons and install step fl. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately. If not you ll have to buy new flashing 50 to 100 either from the skylight manufacturer or from a roofing company that has a metal fabrication shop look under roofing.