Flashing is used for protection against leaks in vulnerable areas of a roof especially where there is heavy water runoff. Think of flashing like a metal “molding” around chimneys, dormers, vents, skylights, and valleys, places where leaks are most likely.
The most common flashing types are:
Valley flashing
Used to protect valleys of a roof. Flashing is installed over the elt layer than covered in roofing material.
Vent pipe flashing
Protects the area around a vent, typically with a flange at the bottom incorporated into shingles as they are installed.
Lead flashing
Used with tile roofs, the lead is formed to the shape of the tile.
Step Flashing
Creates a step-like appearance on the side of a chimney or dormer. Created by using individual strips of flashing being added with each layer of shingles.
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