1” Field-Lok™ panel with 1” high seam FLL is a non-structural mechanically seamed single-locked or double-locked roof panel. FLL has passed industry performance tests in accordance with UL 580 Class 90. The panel system is installed with either an expansion or fixed clip.

It can be curved (FLX) with or without plank ribs for special accents, as well as over entrances and walkways. The minimum radius is 8'-0". Click here for info. on curved 1" Field-Lok™.

Contact ATAS for radius limitations.

Mechanical Seamer Rental Site

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.032, .040 aluminum      
24, 22* ga. metallic coated steel
24 ga. 55% Al-Zn alloy coated steel with acrylic coating
16, 20 oz. copper*
.7 mm zinc*
.0197 classic & terne coated stainless steel*
Panel Coverage:
13 ½”
17 ½”
21 3/4”
Custom widths available
(Plank ribs standard, specify without)
Panel Length:
Cut to customer specifications with a minimum of 4’-0”, maximum to transportation limitations and/or product and project design considerations
Seam Height:
Available Tapered, Convex
Kynar 500® PVDF or Hylar 5000® PVDF
Choice of over 30 stock colors
Custom colors available*
A complete line of trims available in matching colors, gauge and finish or as specified
Minimum Slope:
2:12 depending on climate conditions

Optional sealant is available
*Subject to minimum quantities and lead time
Inquire for availability
Panel width may vary.


Field-Lok™ is a trademark of ATAS International, Inc.
Kynar 500® is a trademark of Arkema Inc.
Hylar 5000® is a trademark of Solvay Solexis, Inc.


Details provided allow for typical expansion and contraction values of the metal cladding materials as provided by ATAS International, Inc only. Allowance must be made for additional sub-structure movement based upon materials used and overall project design.

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Delaplane Winery, Delaplane, VA

Field-Lok (FLL217), Black

Morning Star Church, MO

Field-Lok, Silversmith

Cincinnati Zoo

Field-Lok, Dove Grey

Children's Hospital Kings Daughter, Virgina Beach, VA

Field-Lok (FLX175), Bone White

Glasbern Inn, Fogelsville, PA

Feild-Lok(FLL175), Redwood

Rosemont School, Bryn Mawr, PA

Castle Top & Field-Lok, Slate Grey & Sierra Tan

Private Residence, Jeannette, PA

Field-Lok (FLL), Slate Grey

Private Residence, Dobbs Ferry, NY

Field-Lok (FLL), Classic Bronze


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