Tamlyn GF425 Garage Flashing - 7" Profile x 10 ft - Pack of 100

Tamlyn GF425 Specialty Flashing — Precision-Engineered for Watertight Construction

The Tamlyn GF425 is a 7" garage flashing profile (1/2" x 2-1/2" x 4") supplied in 10-foot lengths of standard-gauge galvanized steel, designed to secure watertight construction assemblies at garage and slab-edge conditions where standard flashing profiles fall short. Part of Tamlyn's broad GF series of specialty flashing items, this piece addresses the unique geometric and sealing demands encountered in complex building envelope conditions. It is suited for use by contractors, builders, and trade professionals requiring reliable moisture management at critical transition points.

Unlike generic flashing options, the GF425 is available in multiple material grades — including Builder grade, Standard grade, and 26-gauge Galvanized (GZD) — and can be ordered in a range of factory-painted stock colors. This flexibility allows professionals to match structural requirements and aesthetic specifications without resorting to field fabrication or special-order delays for common color needs.

Key Features & Benefits

Standard-Gauge Galvanized Steel

The GF425 is stocked in standard-gauge galvanized steel. Builder-grade, 26-gauge, and painted finishes are available from Tamlyn as special orders — contact us for pricing and lead times.

Factory Painted Color Options

Stock painted finishes — Almond (AM), Brown (BR), Black (BK), Charcoal (CB), and White (WH) — are available directly, eliminating the need for field painting or costly special orders on the most common color specifications. Colors outside the stock range are available as special order for project-specific requirements.

Watertight Construction Support

Engineered specifically to assist in securing watertight building envelopes, the GF425 addresses transition and termination conditions that standard trim or flashing cannot accommodate. Proper flashing at these points is critical to preventing water infiltration and the long-term structural damage associated with it.

Specialty Profile Geometry

The GF425 profile, as seen in the product image, features a precise angular form that integrates at wall or roof transitions to direct water away from the building assembly. This geometry is purpose-built rather than field-bent, ensuring consistent performance across installations.

Broad Compatibility with GF Series Components

As part of Tamlyn's GF specialty flashing line, the GF425 is designed to work alongside other GF series components, providing a cohesive system approach to complex flashing conditions rather than requiring mismatched components from multiple suppliers.

Catalog-Backed Product Line

The GF425 is documented in Tamlyn's official flashing catalog, giving estimators and specifiers access to verified dimensions and profile details. This supports accurate takeoffs and submittal packages for commercial and residential projects alike.

Common Applications

Wall-to-Roof Transitions

The GF425 profile is well-suited for flashing conditions where a vertical wall meets a roof plane, directing water away from the joint and preventing infiltration at this high-risk intersection.

Window and Door Head Flashing

Specialty flashing profiles like the GF425 are used above window and door openings to shed water over the unit and away from the rough opening, protecting the wall assembly from prolonged moisture exposure.

Parapet and Cap Flashing Applications

The angular geometry of the GF425 makes it appropriate for parapet wall cap flashing conditions where a formed metal component must bridge the top of a wall and direct water to either side.

Sill and Base Flashing

At grade-level or low-wall transitions, the GF425 can be employed as a base flashing to terminate cladding systems and prevent ground-level moisture from wicking into the wall assembly.

Cladding Termination Points

Where siding, stucco, or other cladding systems terminate at penetrations, corners, or openings, the GF425 provides a formed metal termination that seals the edge and maintains the drainage plane.

Commercial Envelope Detailing

For commercial projects requiring submitted flashing details, the GF425's catalog documentation and multiple material options make it a reliable choice for specifications that must meet plan requirements and third-party review.

Compatible Materials

• Builder grade (Bldr) sheet metal
• Standard grade (STD) sheet metal
• 26-gauge Galvanized steel (26 Ga GZD)
• Factory-painted finishes: Almond, Brown, Black, Charcoal, White
• Special order painted colors (non-stock)
• Compatible with Tamlyn GF series specialty flashing components
• Suitable for use with standard building wrap and water-resistive barrier systems

Product Documents

• GF Series Catalog Page (PDF)
• Tamlyn Water Management System Warranty
• Warranty Registration Form
• XtremeTrim Limited Warranty
• XtremeInterior Limited Warranty
• XtremeInterior Specifications — Section 092701
• XtremeTrim Specifications
• Tamlyn Credit Application

Technical Specifications

Frequently Asked Questions

Q: What does the GF425 item ID indicate?
A: The GF prefix identifies this as part of Tamlyn's GF specialty flashing series, with 425 designating the specific profile. Consult the GF catalog page for full dimensional details of this profile.

Q: Which material grade should I specify for exterior exposure?
A: For exterior applications with direct weather exposure, 26-gauge Galvanized (26 Ga GZD) offers enhanced corrosion resistance. Builder or Standard grade may be appropriate for sheltered or interior-adjacent conditions. Verify with project specifications.

Q: How do I order a painted color?
A: When ordering, append the appropriate color suffix to the item number — for example, GF425-WH for White or GF425-BK for Black. Colors outside the five stock options must be specified as special order and may have extended lead times.

Q: Is the GF425 a standard stock item or made to order?
A: Standard material grades and the five stock painted colors are typically available through Tamlyn's distribution network. Special order colors will require additional lead time. Contact Tamlyn or your distributor to confirm current availability.

Q: Can the GF425 be used with Tamlyn's water-resistive barrier systems?
A: Yes. Tamlyn's specialty flashing components are designed to integrate with their broader water management system, including TamlynWrap products and XtremeFlashing tapes, to support a complete building envelope assembly.

Q: Where can I get dimensional drawings for submittal packages?
A: The GF Series Catalog Page PDF contains profile dimensions and can be downloaded directly from the Product Documents section above. Contact Tamlyn technical support at 1-800-334-1676 for project-specific submittal assistance.