GAF 2.75 in. Drill-Tec Barbed SXHD Seam Plates, 500-Box

This is a box of 500 GAF Drill-Tec 2.75 in. barbed SXHD (Super Extra Heavy-Duty) steel seam plates for mechanically fastening single-ply membranes and insulation in commercial roofing. The barbed design increases holding power under the membrane, and each box supplies 500 plates for use with matching GAF Drill-Tec fasteners.

Key Features:

• Super heavy duty: SXHD construction is GAF’s Super Extra Heavy-Duty plate for demanding mechanical attachment.
• Barbed design: Barbed underside bites into insulation to boost pull-through resistance.
• Wide bearing: 2.75 in. diameter distributes load over insulation and membrane for secure fastening.
• Bulk box: 500 plates per box supports large mechanically attached roofing jobs.
• Steel build: Made of steel for strength under the fastener head.
• Code listed: FM Approved and Miami-Dade County Approved for commercial roofing use.

Specifications Table:

Coverage & How Much You Need:

Plate count depends on the fastening pattern; seam-fastened membranes typically use one row of plates per seam per the membrane manufacturer’s spacing. A 500-plate box covers roughly 4,000 to 6,000 linear ft of seam at 9 to 12 in. plate spacing, subject to the specified wind uplift pattern.

Fit and Compatibility:

Designed for GAF Drill-Tec roofing fasteners (sold separately) and GAF single-ply membrane systems; use with the fastener size and pattern specified in the assembly’s wind uplift design.

Frequently Asked Questions (FAQ):

Q: How many plates come in a box?
A: Each box contains 500 steel 2.75 in. barbed SXHD seam plates.

Q: Do these include screws?
A: No, plates are sold separately from fasteners; order GAF Drill-Tec fasteners in the length matching your insulation thickness and deck.

Q: What does barbed mean on a seam plate?
A: Barbs on the plate underside grip the insulation, increasing pull-through resistance compared to a smooth plate.

Q: What spacing should I use?
A: Follow the membrane manufacturer’s attachment pattern and wind uplift calculation; common seam-attachment spacing is 9 to 12 in. on center.

Q: Are they approved for my roof system?
A: They are FM Approved and Miami-Dade County Approved; confirm the plate in your specific assembly’s approved fastening schedule.

Q: What fasteners fit these plates?
A: They are used with standard roofing screws in the Drill-Tec line; verify shank fit with GAF’s fastener documentation.

Expert Verdict Reviewed by the SuperArbor Pro Desk

SXHD plates are the choice where wind uplift calculations call for extra pull-through resistance or where insulation is softer and a standard plate could telegraph or pull through. Pair plate size and fastener length to the insulation plus deck embedment in your uplift design, and drive screws with a clutch-adjusted screw gun so the plate seats without over-compressing the membrane.

Wear eye protection and gloves when handling and driving fasteners and plates, and follow the manufacturer’s instructions and uplift requirements.

Order GAF Drill-Tec 2.75 in. barbed SXHD seam plates for maximum holding power on mechanically attached roofs.