Gravel Guard Roof Edge - Style E & Modified Knuckle

Tamlyn Gravel Guard Roof Edge — Style E & Modified Knuckle Profiles for Flat & Gravel Roofs

Tamlyn Gravel Guard is a roof edge flashing engineered to deflect water away from the fascia board on conventional gravel and flat roof applications. Sold in 10-foot lengths of standard-gauge galvanized steel, it is available in two knuckle styles: the Style E Standard Knuckle (GE) with a 3/4" knuckle bend, and the Modified Knuckle (GM) profile offered in three face sizes. Both styles are built for low-slope and built-up roofing systems where reliable edge termination is critical, serving roofing contractors, general contractors, and commercial builders.

Unlike a standard drip edge, the gravel guard knuckle serves two functions: it increases structural rigidity along the length of the flashing, and it conceals the roof deck edge for a cleaner finished appearance. This geometry reduces flex and oil-canning on longer runs while maintaining a professional edge detail without additional trim components.

Key Features & Benefits

Knuckle Bend for Enhanced Rigidity

The knuckle bend stiffens the profile across its length, reducing the risk of warping or flexing on long runs. For contractors working on large flat-roof commercial projects, this means fewer callbacks related to edge distortion and a cleaner installation with less handling time.

Two Knuckle Styles

The Style E Standard Knuckle (GE3060) uses the classic 3/4" knuckle with a 3" face and 2-1/4" on-roof leg. The Modified Knuckle (GM) series adjusts the knuckle geometry and comes in 2-1/2", 3", and 3-1/2" face heights, letting you match the fascia depth and edge condition on the job.

Fascia Board Water Deflection

Each profile is shaped to direct water away from the fascia board, protecting it from chronic wetting and accelerated deterioration. On flat and gravel roofs where standing water is common, this edge geometry is critical to the long-term performance of the roof assembly.

Roof Deck Concealment

The knuckle profile hides the raw roof deck edge from view at the eave, eliminating the need for secondary trim or coping to achieve a finished appearance — particularly valuable on commercial projects where the building edge is visible from grade.

Galvanized Steel Construction

All stocked profiles are standard-gauge galvanized steel in 10-foot lengths, providing corrosion resistance in exposed roofline conditions. Builder-grade, 26-gauge, and painted finishes (Almond, Brown, Black, Charcoal, White) are available from Tamlyn as special orders — contact us for pricing and lead times.

Common Applications

Conventional Gravel Roof Edge Termination

Designed for gravel-ballasted built-up roofing systems, providing a clean, watertight termination at the roof perimeter where gravel stops and the fascia begins.

Flat Roof Edge Flashing

On flat commercial or low-slope residential roofs, the gravel guard provides proper edge drainage geometry and fascia protection — a required component in most low-slope roofing assemblies.

Fascia Protection on Exposed Eaves

Where fascia boards are susceptible to water intrusion at the roof edge, the gravel guard creates a positive drainage angle that keeps water moving away from wood or composite fascia substrates.

Built-Up Roofing (BUR) Systems

Compatible with traditional built-up roofing assemblies, providing the required edge metal transition between the roofing membrane and the fascia or parapet cap.

Commercial & Residential Low-Slope Projects

The rigid profile and multiple face sizes suit commercial projects requiring consistent edge detailing across long linear runs, as well as custom homes or additions with flat or low-slope roof sections.

Available Sizes / Configurations

Additional Style E profiles (GE2050, GE3570, GE3580) are available from Tamlyn as special orders — contact us for pricing.

Product Documents

• Catalog Page — GE/GM Conventional Flashing

Technical Specifications

Frequently Asked Questions

Q: What is the difference between the Standard Knuckle (GE) and Modified Knuckle (GM) styles?
A: The Standard Knuckle Style E (GE3060) uses Tamlyn's classic 3/4" knuckle bend with a 3" face and 2-1/4" on-roof leg. The Modified Knuckle (GM) series adjusts the knuckle geometry and is offered in 2-1/2", 3", and 3-1/2" face sizes. Both deflect water from the fascia and conceal the roof deck edge — the right choice depends on your fascia depth and edge detail. See the GE/GM catalog page above for full profile drawings.

Q: What is the purpose of the knuckle on a gravel guard?
A: The knuckle serves two functions: it adds rigidity to the profile to resist flex and oil-canning on long runs, and it conceals the raw edge of the roof deck for a cleaner finished appearance without additional trim.

Q: What lengths and material do these come in?
A: All four stocked profiles are 10-foot lengths in standard-gauge galvanized steel. Builder-grade and 26-gauge material are available as special orders.

Q: Can I order a painted finish?
A: Painted finishes — Almond, Brown, Black, Charcoal, and White — are available as special orders, along with non-stock custom colors. Contact us for pricing and lead times.

Q: Is this suitable for modified bitumen or TPO roofing systems?
A: These profiles are designed for conventional gravel and flat roof applications. For compatibility with TPO, EPDM, or modified bitumen systems, confirm with Tamlyn technical support at 1-800-334-1676 before specifying.

Q: What if I need a size that isn't listed?
A: Tamlyn offers additional gravel guard profiles (including GE2050, GE3570, and GE3580) as special orders. Contact us to discuss sizing for your project.