Tamlyn BFHH Angle/Base Steel Flash Double Hem — Leak-Proof Wall-to-Roof Flashing
The Tamlyn BFHH is a double-hemmed angle and base steel flashing designed for efficient wall-to-roof and chimney-to-roof connections. Engineered to prevent water infiltration at critical transition points, this flashing is sold in individual 10-foot lengths, making it an efficient choice for commercial and residential roofing and cladding projects. Stocked in standard-gauge galvanized steel in two girth sizes — 8-1/2" (3" x 5" legs, BFHH1035) and 10-1/2" (5" x 5" legs, BFHH1055) — with Builder-grade, 26-gauge, and painted finishes available as special orders.
The double-hem construction sets the BFHH apart from single-hem alternatives by folding back the exposed edge, eliminating the sharp cut edge hazard common on single-hem parts. This not only makes the product safer for retail and job-site handling, but also improves the finished appearance at the flashing edge and adds structural rigidity to the profile.
Key Features & Benefits
Double-Hemmed Edge Design
The double hem folds the raw steel edge back on itself, eliminating sharp exposed edges that can cause cuts during handling and installation. This makes the BFHH significantly safer for crews working overhead or in confined spaces at wall-to-roof transitions. It also creates a cleaner finished edge visible from ground level.
Efficient Wall-to-Roof Application
Engineered specifically for the angle between vertical wall surfaces and sloped or flat roof decks, the BFHH seats precisely at this junction to redirect water away from the substrate. Proper base flashing at these transitions is the primary defense against chronic leak points in roofing assemblies.
Chimney and Wall Connection Protection
Chimney-to-roof connections are among the highest-risk leak locations on any structure. The BFHH provides a durable metal barrier at these joints, resisting wind-driven rain and standing water that would otherwise penetrate behind cladding or underlayment.
Galvanized Steel Construction
Stocked in standard-gauge galvanized steel; Builder-grade and 26-gauge material are available as special orders for projects with specific gauge requirements. Galvanized construction provides corrosion resistance for long-term performance in wet climates or coastal environments.
Painted Color Options for Finish Matching
Stock painted finishes — Almond (AM), Brown (BR), Black (BK), Charcoal (CB), and White (WH) — allow the flashing to blend with surrounding cladding, trim, or roofing materials. Special-order colors are available for custom project requirements.
Two Girth Sizes
Choose the 8-1/2" girth (3" x 5" legs) for standard wall-to-roof transitions, or the 10-1/2" girth (5" x 5" legs) where wider coverage is needed on both the vertical and horizontal planes. Both profiles carry a 1/2" double hem and come in 10-foot lengths, sold per piece.
Common Applications
Wall-to-Roof Transitions
The primary application for the BFHH is at the base of vertical walls where they meet a sloped roof plane, creating a watertight seal that prevents water from tracking behind cladding and into the wall assembly.
Chimney Base Flashing
Installed at the base of chimneys where they penetrate or abut a roof surface, the BFHH provides the base layer of a step-flashing system, directing water away from the masonry-to-roof joint.
Parapet and Curb Base Flashing
Used at the base of parapets, curbs, and other vertical penetrations on low-slope roofs where a durable metal angle is needed to transition from the vertical face to the roof membrane.
Residential and Commercial Roofing
Suitable for both residential reroof projects and new commercial construction where code-compliant metal flashing is required at wall and penetration interfaces.
Cladding and Siding Integration
Installed behind lap siding, stucco, or panel cladding systems to intercept water at the base course and direct it outward past the WRB and drainage plane.
Compatible Materials
- Builder-grade steel (Bldr)
- Standard-grade steel (STD)
- 26-gauge Galvanized steel (26 Ga GZD)
- Painted finishes: Almond (AM), Brown (BR), Black (BK), Charcoal (CB), White (WH)
- Special-order painted colors available on request
- Compatible with lap siding, stucco, panel cladding, and roofing underlayment systems
- For use with masonry chimneys, wood-framed walls, and structural curbs
Available Configurations
| Material / Finish Option | Best For |
|---|---|
| Bldr (Builder Grade) | Cost-sensitive residential applications with standard exposure |
| STD (Standard Grade) | General commercial and residential roofing and cladding transitions |
| 26 Ga GZD (Galvanized) | High-moisture, coastal, or long-term exposure environments requiring corrosion resistance |
| Painted — Almond (AM) | Color-match to light tan or almond siding and trim systems |
| Painted — Brown (BR) | Color-match to brown cladding, cedar, or earth-tone roofing |
| Painted — Black (BK) | Modern or dark cladding systems, metal roofing |
| Painted — Charcoal (CB) | Dark gray cladding, fiber cement, or architectural panel systems |
| Painted — White (WH) | White or light cladding, trim, and fascia coordination |
| Special Order Colors | Custom project specifications requiring non-stock finish colors |
Product Documents
Technical Specifications
| Specification | Details |
|---|---|
| Item IDs | BFHH1035 (8-1/2" girth, 3" x 5" legs), BFHH1055 (10-1/2" girth, 5" x 5" legs) |
| Product Name | Angle/Base Steel Flash Double Hem |
| Length | 10 feet (10′) |
| Sold As | Individual 10 ft pieces |
| Hem Type | Double Hemmed |
| Stocked Material | Standard-gauge galvanized steel (Bldr and 26 Ga available as special order) |
| Painted Stock Colors | Almond (AM), Brown (BR), Black (BK), Charcoal (CB), White (WH) |
| Special Order Colors | Available upon request |
| Primary Application | Wall-to-roof and chimney-to-roof transitions |
| Edge Treatment | Double hemmed for safety and finished appearance |
Frequently Asked Questions
Q: What is the difference between the Builder (Bldr) and Standard (STD) grades?
A: Builder grade is intended for cost-controlled residential applications with standard weather exposure, while Standard grade is suited for general commercial and residential use. The 26 Ga GZD (galvanized) option adds corrosion resistance for high-moisture or coastal environments. Contact your Tamlyn representative for specific gauge and coating details.
Q: Can the BFHH be ordered in custom colors beyond the five stock painted finishes?
A: Yes. Colors beyond Almond, Brown, Black, Charcoal, and White are available as special order. Lead times for special-order painted finishes will vary — confirm availability and scheduling with your distributor before specifying on time-sensitive projects.
Q: Why does the double-hem design matter on a job site?
A: Single-hem or raw-cut flashing leaves a sharp exposed steel edge that creates a laceration risk during handling, especially when workers are dealing with material overhead or in confined roof-to-wall cavities. The double hem folds that edge back, making the part safer to handle without sacrificing performance.
Q: How is the BFHH packaged, and is the bundle count consistent for estimating?
A: The BFHH is sold as individual 10-foot pieces, so you can order exactly the linear footage your project requires.
Q: Is this product suitable for use at chimney bases as part of a step-flashing system?
A: Yes. The BFHH is specifically designed to protect chimney-to-roof connections in addition to wall-to-roof transitions. It serves as the base layer at the chimney's upslope and side faces, integrated with step flashing and counter flashing as required by the assembly.
Q: Are there any warranty or registration requirements for the BFHH?
A: The BFHH is a conventional metal flashing component. Review Tamlyn's published warranty documentation for terms applicable to this product. For water management system warranties involving TamlynWrap products used in conjunction with this flashing, project registration may be required — see the Warranty Registration form linked above.