Quick Answer
Solar flashing refers to the method of sealing gaps between solar panels and roof flashing to prevent water intrusion and ensure a watertight seal. There are several types of solar flashing, including roof-mounted, standing seam, and tile-over flashing systems. Each type has its own unique installation requirements.
Roof-Mounted Flashing Systems
Roof-mounted flashing systems are the most common type of solar flashing. They typically consist of a flat or curved flashing piece that is attached to the roof deck and covers the gap between the solar panel and the roof. To install a roof-mounted flashing system, start by measuring the gap between the solar panel and the roof to determine the correct size of flashing piece needed. A 1/4-inch gap is ideal, and a 2-inch piece of flashing can cover a 6-inch panel width. Use a 3/4-inch-wide self-adhesive flashing tape to secure the flashing piece to the roof deck. Make sure to seal all edges with a bead of silicone caulk to prevent water intrusion.
Standing Seam Flashing Systems
Standing seam flashing systems are designed for use on standing seam metal roofs. These systems typically consist of a specialized flashing piece that is attached to the standing seam roof panels and covers the gap between the solar panel and the roof. To install a standing seam flashing system, start by identifying the location of the standing seam roof panels and marking the area where the flashing will be installed. Use a 3/4-inch-wide self-adhesive flashing tape to secure the flashing piece to the roof deck. Make sure to seal all edges with a bead of silicone caulk to prevent water intrusion.
Tile-Over Flashing Systems
Tile-over flashing systems are designed for use on tile roofs. These systems typically consist of a specialized flashing piece that is attached to the tile roof and covers the gap between the solar panel and the roof. To install a tile-over flashing system, start by identifying the location of the tile roof and marking the area where the flashing will be installed. Use a 3/4-inch-wide self-adhesive flashing tape to secure the flashing piece to the roof deck. Make sure to seal all edges with a bead of silicone caulk to prevent water intrusion. It’s also recommended to use a tile-over flashing clip to secure the tile in place, which can be found at most roofing supply stores.
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