Protecting the intersections where a roof meets a vertical surface, such as a chimney, wall, or parapet, is paramount to preventing water damage and ensuring the integrity of the building envelope. Galvanized Steel Counter Flashing, available through A1A Wholesale Supply, serves as a vital protective cap in a multi-layer flashing system. Working in conjunction with base flashing (which is installed on the roof deck and turned up the vertical surface) or step flashing (used at roof-to-wall step situations), counter flashing is installed on the vertical surface, overlapping the top edge of the base or step flashing.
Constructed from robust Galvanized Steel, this counter flashing benefits from a protective zinc coating that provides excellent resistance to rust and corrosion. This durability makes it well-suited for exposed exterior applications, where it is constantly subjected to rain, snow, and other environmental factors.
The profile of galvanized steel counter flashing is typically an L-shape or a Z-shape with a hemmed lower edge. This shape allows one leg of the flashing to be secured to or into the vertical surface, while the other leg extends downwards, overlapping the primary base or step flashing. The hemmed edge at the bottom of the overlapping leg helps to create a drip edge, ensuring water sheds cleanly away from the wall and onto the roof surface below.
Counter flashing is available in various sizes to accommodate different wall thicknesses, flashing overlap requirements, and the dimensions of the base or step flashing being covered. Dimensions are typically described by the width/height of its legs and the size of the hem. Common gauges for galvanized steel counter flashing include 26 GA and 28 GA, providing a balance of rigidity for secure installation and formability for adapting to different surfaces. 30 GA may also be available for some applications.
Galvanized steel counter flashing is typically available in its standard metallic Mill Finish. For projects requiring a specific aesthetic or enhanced protection, it is also commonly offered with a durable Painted finish. Painted options come in a variety of standard exterior colors to match or complement surrounding building materials.
This flashing is generally supplied in standard 10-foot or 12-foot lengths, providing convenient sections for installation along longer wall or chimney sections while minimizing joints. It is typically packaged in bundles for ease of handling. Installation methods commonly involve inserting one leg into a mortar joint (reglet) in masonry construction, or surface-mounting and sealing the flashing against non-masonry vertical surfaces.
While specific offerings may vary, DOT Metals is a manufacturer of quality metal building products, including galvanized steel flashing components in essential profiles like counter flashing. This Galvanized Steel Counter Flashing represents a fundamental, durable, and corrosion-resistant option within such a product line, suitable for roofing contractors and builders for ensuring watertight seals at critical vertical intersections on roofs. By choosing Galvanized Steel Counter Flashing from A1A Wholesale Supply, roofing contractors can utilize a reliable and effectively designed flashing product that is an indispensable part of a comprehensive flashing system, providing long-lasting protection against water intrusion.
- Product Name: Galvanized Steel Counter Flashing
- Brand: DOT Metals
- Type: Counter Flashing, Cap Flashing, Metal Flashing, Roofing Flashing, Wall Flashing, Chimney Flashing, Parapet Flashing
- Material: Galvanized Steel
- Gauge: Commonly available in 26 GA or 28 GA
- Profile: Typically L-shaped or Z-shaped with a hemmed lower edge.
- Dimensions: Available in various sizes to overlap base/step flashing
- Finish: Mill Finish or Painted
- Length: Typically 10 feet or 12 feet
- Function: Overlaps base/step flashing to prevent water from getting behind the primary flashing; directs water away from vertical surfaces and over roofing.
- Uses: Installed on vertical surfaces (chimneys, walls, parapets) where they intersect with a roof, to cover base or step flashing.
- Properties: Durable (Galvanized Steel), Corrosion resistant, Designed to shed water effectively, Available in different gauges, sizes, and finishes/colors, Standard lengths.
- Benefits: Essential for a watertight flashing system, Prevents water damage behind primary flashing, Provides a finished appearance at intersections, Long-lasting performance.