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ACM Counter Flashing, 26 ga Galvanized Steel, 4 in. or 6 in. Mill Finish
Regular price $20.70Orders start at $399 — combine any items to reach the minimum. Learn more
ACM Counter Flashing, 26 ga Galvanized Steel, 4 in. or 6 in. Mill Finish
ACM Counter Flashing is 26 gauge galvanized steel counter flashing sold per piece in 4 in. and 6 in. mill finish profiles. It caps base flashing at walls, chimneys and curbs where the roof meets vertical surfaces. Two sizes let you match the coverage your wall detail requires.
Key Features:
- Heavy 26 ga steel: Formed from 26 gauge galvanized steel for durable roof-to-wall flashing performance.
- Two size choices: Offered in 4 in. and 6 in. profiles to cover different wall heights and base flashing laps.
- Mill finish: Both variants come in a bare galvanized mill finish.
- Roof-to-wall sealing: Sheds water down over base flashing where roof surfaces terminate at vertical walls.
- Sold per piece: Ordered piece by piece so you can buy exactly the run length needed.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | ACM |
| Sell unit | 1 piece |
| Product line | ACM Counter Flashing |
| Material | Galvanized steel |
| Thickness | 26 gauge |
| Available sizes | 4 in., 6 in. |
| Available colors | Mill |
| Dimensions | 4 in. and 6 in. profiles |
| Intended use | Counter flashing at roof-to-wall transitions, chimneys and curbs |
Coverage & How Much You Need:
One piece is one formed length of counter flashing; divide the total linear footage of the wall or chimney perimeter by the piece length to determine quantity. The 6 in. profile provides taller wall coverage where base flashing turns up higher.
Fit and Compatibility:
Designed to lap over ACM and other base flashing at roof-to-wall intersections. Fastening methods, piece length and reglet-versus-surface-mount details are not stated in the sources, so confirm before installation.
Frequently Asked Questions (FAQ):
Q: What sizes are available?
A: Two variants: 4 in. and 6 in., both in 26 gauge galvanized mill finish.
Q: What material is it made from?
A: 26 gauge galvanized steel with a mill (bare) finish.
Q: Where is counter flashing used?
A: At roof-to-wall transitions, chimneys and curbs, where it overlaps and protects base flashing.
Q: How do I know how many pieces to order?
A: Measure the linear footage of the wall or curb to be flashed and divide by the per-piece length.
Q: Can it be painted?
A: Paint compatibility with the bare galvanized mill finish is not stated in the sources; follow standard galvanized metal prep practice.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Pick the 6 in. size where the wall has taller exposed base flashing or where wind-driven rain is a concern, and the 4 in. size for standard upturns. Counter flashing must always lap over, not under, the base flashing so water sheds outward. Keep the galvanized finish away from direct contact with dissimilar metals to limit corrosion risk.
Sheet metal edges are sharp; wear gloves and eye protection when cutting and setting counter flashing, especially when working from ladders.
Order ACM 26 ga galvanized counter flashing in 4 in. or 6 in. to complete your roof-to-wall detail.
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