Tamlyn JF Series J Turnback Flashing for Roofs - 100 Pieces

Tamlyn J Turnback Flashing — Reliable Wall-to-Roof Leak Protection

The Tamlyn JF Series J Turnback Flashing is engineered for efficient wall-to-roof applications, providing a durable barrier against water intrusion at walls, chimneys, and roof connections. Designed for professional contractors and builders, it delivers a precise 90° profile that integrates cleanly into standard construction assemblies. Stocked in standard-gauge galvanized steel in eight girth sizes from 8-1/2" to 18", with painted finishes and other gauges available as special orders, this flashing accommodates a broad spectrum of project specifications.

Unlike basic flashing alternatives, the JF Series features double hemmed edges on applicable parts, which significantly reduces sharp-edge hazards making them safer for handling at retail and job-site distribution. Angles other than 90° are available as special order, providing flexibility for non-standard architectural details that standard flashing products cannot accommodate.

Key Features & Benefits

Double Hemmed Edges

Double hemmed construction folds and finishes the flashing edges, eliminating exposed sharp metal that poses handling risks. This is a critical safety feature for job-site distribution and retail outlet sales, reducing the likelihood of cuts during installation and material handling.

Wall-to-Roof Leak Protection

The J Turnback profile is specifically shaped to direct water away from vulnerable transition points where walls and chimneys meet the roof deck. This geometry reduces standing water infiltration that commonly causes long-term structural damage at these junctions.

Standard-Gauge Galvanized Steel

All eight stocked profiles are standard-gauge galvanized steel in 10-foot lengths. Builder-grade and 26-gauge material, along with painted finishes, are available as special orders to match flashing performance to budget and exposure requirements.

Painted Color Options

Stock painted finishes — Almond (AM), Brown (BR), Black (BK), Charcoal (CB), and White (WH) — allow the flashing to coordinate with exterior color schemes without additional field painting. Colors other than stock can be sourced as special order to meet project-specific requirements.

Special Order Angle Configurations

While the standard profile is 90°, Tamlyn offers non-standard angles as special orders. This makes the JF Series adaptable to custom roof pitches and architectural conditions where off-the-shelf flashing angles will not perform correctly.

Consistent, Precise Profile

The J Turnback shape provides a reliable, repeatable profile that seats correctly against wall substrates and roof planes. Consistent geometry reduces installation variability and ensures uniform performance across the full run of flashing on any given project.

Common Applications

Wall-to-Roof Connections

The primary application for the JF Series is sealing the transition where a vertical wall surface meets a sloped roof plane, preventing water from migrating behind cladding or under roofing materials at this critical junction.

Chimney Flashing

Chimneys penetrate the roof deck and create a high-risk area for water infiltration. The J Turnback profile provides the necessary geometry to redirect water away from the chimney-to-roof interface.

Parapet and Step Flashing Details

Wherever a vertical structure meets a roof surface and requires a turned-back edge to lock flashing in place, the JF profile provides the correct termination geometry to maintain a weathertight seal.

Dormer and Addition Tie-Ins

Roof additions and dormers create new wall-to-roof intersections that must be properly flashed. The JF Series installs at these tie-in points to prevent moisture intrusion at newly created vulnerabilities.

Retail and Distributor Supply

The double hemmed variant is specifically suited for retail outlet and distribution channel sales where safe handling by non-specialist personnel is a consideration, reducing liability associated with sharp-edge metal products.

Compatible Materials

• Builder-grade (Bldr) sheet metal
• Standard-grade (STD) sheet metal
• 26-gauge Galvanized (26 Ga GZD) steel
• Standard painted finishes: Almond, Brown, Black, Charcoal, White
• Special order custom colors and non-90° angle configurations

Available Item IDs / Configurations

Product Documents

• Catalog Page — JF Turnback Flashing
• Tamlyn Credit Application
• Tamlyn Water Management System Warranty
• Warranty Registration Form

Technical Specifications

Frequently Asked Questions

Q: Are angles other than 90° available for the JF Turnback Flashing?
A: Yes. Non-90° angles are available as special order. Contact Tamlyn directly at 1-800-334-1676 to discuss custom angle requirements for your specific project conditions.

Q: What material options are available for the JF Series?
A: The JF Turnback Flashing is available in Builder-grade (Bldr), Standard (STD), and 26-gauge Galvanized (26 Ga GZD). Painted options include Almond, Brown, Black, Charcoal, and White as stock colors, with custom colors available as special order.

Q: What does double hemmed mean and why does it matter?
A: Double hemming folds back and finishes the exposed metal edge, eliminating sharp raw edges. This reduces cut hazards during handling and installation, and is particularly important for products distributed through retail outlets or handled by multiple trades on the job site.

Q: Which item ID should I select for a standard 4-inch by 4-inch application?
A: JF1044 is the standard 4x4 profile configuration suitable for typical wall-to-roof and chimney flashing details. For larger leg dimensions, refer to the JF1055, JF1065, or JF1066 configurations.

Q: Can the JF Turnback Flashing be used at chimney connections?
A: Yes. The J Turnback profile is specifically designed for chimney-to-roof connections in addition to standard wall-to-roof transitions, redirecting water away from these penetration points to prevent infiltration.

Q: How do I specify a painted color when ordering?
A: When ordering a painted finish, append the color code to your order: AM for Almond, BR for Brown, BK for Black, CB for Charcoal, or WH for White. Colors outside of these stock options require a special order designation.