Skip to content
TRI-BUILT 18 in. W-Valley Flashing, Mill Finish, 28 Gauge
Regular price $36.15Orders start at $399 — combine any items to reach the minimum. Learn more
TRI-BUILT 18 in. W-Valley Flashing, Mill Finish, 28 Gauge
This TRI-BUILT 18 in. W-valley flashing with a mill finish lines roof valleys where shingle planes intersect. The 28 gauge sheet ships as one piece per order. Use it with valley underlayment and standard shingle roofing components.
Key Features:
- Mill finish: Uncoated mill finish suits applications where painted color is not required.
- W-shaped rib: The W-profile center rib stiffens the sheet and channels water flow.
- 28 gauge sheet: 28 gauge steel is easy to field-form while remaining durable.
- 18 in. width: The 18 in. width fits standard residential valley applications.
- Sold per piece: Each order unit is a single flashing piece for accurate job takeoffs.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | TRI-BUILT |
| Manufacturer model | TB2150-FH |
| Sell unit | 1 piece |
| Product line | TRI-BUILT flashings |
| Profile / style | W-valley |
| Color | Mill |
| Dimensions | 18 in. width |
| Gauge | 28 ga |
| Material | Galvanized steel (per item code GV) |
| Weight | 9.27 lb |
| Intended use | Open valley flashing under asphalt shingles |
Coverage & How Much You Need:
One piece covers 18 in. of valley width per linear foot. Measure valleys in linear feet and include overlap between pieces per the shingle manufacturer's instructions.
Fit and Compatibility:
Intended for open valleys under asphalt shingles; pair with valley underlayment and TRI-BUILT roof-edge flashings. Underlayment, fasteners and sealants sold separately.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One 18 in. mill-finish W-valley flashing piece.
Q: How much valley does one piece cover?
A: Coverage is 18 in. of valley width per linear foot; order by total valley length plus laps.
Q: Is the metal galvanized?
A: The item code indicates a galvanized (GV) steel substrate with mill finish.
Q: How is it installed?
A: Center the W rib in the valley over underlayment and lap pieces with the water flow.
Q: Are other colors offered?
A: Yes, white and galvanized versions are separate items in the same family.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Mill-finish galvanized W-valley is a economical, time-tested choice for open valleys. Keep the sheet flat against the deck, nail edges only, and follow the shingle manufacturer's required metal exposure. For coastal or highly corrosive environments consider coated finishes.
Wear cut-resistant gloves and eye protection; flashing edges can cause lacerations.
Get the TRI-BUILT 18 in. mill-finish W-valley flashing for clean, reliable valleys.
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
