These profiles are made by passing metal coils through roll forming machines to create precise, durable shapes that provide protection against water infiltration and enhance structural integrity.
Here are some common roll formed metal flashing profiles:
1. Drip Edge Flashing
- Purpose: Protects the edge of the roof by directing water away from the fascia and into the gutter system.
- Typical Use: Installed along roof eaves and rakes.
- Material: Commonly made from aluminum, galvanized steel, or copper.
2. Step Flashing
- Purpose: Seals the joint between a vertical wall (such as a chimney or dormer) and the roof surface to prevent water infiltration.
- Typical Use: Used around chimneys, skylights, or where the roof meets vertical walls.
- Material: Usually made from galvanized steel or aluminum.
3. Valley Flashing
- Purpose: Protects the roof valleys where two roof planes meet, directing water safely into gutters.
- Typical Use: Installed in valleys formed by the intersection of two roof slopes.
- Material: Made from galvanized steel or aluminum for durability and corrosion resistance.
4. Counter Flashing
- Purpose: Installed over base flashing to prevent water from entering behind the base flashing.
- Typical Use: Often seen in conjunction with step flashing around chimneys or walls.
- Material: Copper, aluminum, or galvanized steel.
5. Apron Flashing
- Purpose: Provides a watertight seal between the roof and a vertical surface, such as a wall or chimney.
- Typical Use: Placed along the base of a chimney or a skylight to protect against water ingress.
- Material: Made from metals like galvanized steel, aluminum, or lead.
6. Base Flashing
- Purpose: Works as the bottom layer of flashing at the joint between a roof and a wall.
- Typical Use: Installed at roof-to-wall intersections and paired with counter flashing.
- Material: Galvanized steel, aluminum, or copper.
7. Ridge Cap Flashing
- Purpose: Protects the ridge (top) of the roof where two slopes meet, preventing water from seeping under the shingles or tiles.
- Typical Use: Installed along the ridge of sloped roofs.
- Material: Typically made from pre-coated steel or aluminum.
8. Z-Flashing
- Purpose: Directs water away from windows, doors, or horizontal joints in siding.
- Typical Use: Installed where horizontal sections of siding meet to protect against water penetration.
- Material: Often made from galvanized steel or aluminum.
Each of these profiles is manufactured using roll forming machines that create highly accurate and consistent shapes, ensuring that the flashing fits perfectly and performs its intended function effectively. These flashing components are critical in keeping buildings watertight and protecting against the elements.
