The ML-150 Mechanical Lock (1.5” High standing seam) features structural performance as well as architectural aesthetics. ML-150 Panels can be factory formed and/or fabricated, for all substrates, at project locations. Utilizes concealed fasteners with a fixed and/or floating clip system. The floating clip system reduces the effects of thermal stresses on the panels helping to maintain a beautifully smooth, and uniform appearance, despite fluctuations in temperature.    


ML-150 Mechanical Lock Panel is a mechanically seamed, vertical leg, standing seam roof system that combines a 1.5-inch tall slim rib with exceptional uplift resistance. ML-150 Panels are designed to withstand the most rigorous weather conditions. The ML-150 Panel is available in a 16-inch width and allows for the installation directly over purlins and bar joists.


24 GA steel.

Colors available on standard, premium and metallic.

Coverage 16” MAX 

On site or factory made.

Available in smooth, striated and stiffener ribs.

UL Construction Number: TGKX554.

Uplift resistance of prepared roof-covering materials UL 580 Class90.

Impact resistance of prepared roof-covering materials UL2218 Class 4.

Fire tests of roof coverings UL 790. Class A, B, C. External fire exposure.

TDI Texas Approved.

Product Specifications

Applications: Roof

Coverage Widths: 16.00” Max.

Minumum Slope: 1 1/2:12

Panel Attachment: Standing Seam System, Fixed and Floating Clip.

Gauges: 24 (standard), 22 and 26 (optional)

Coatings: Galvalume®, Durapon 70®, Ceranamel®.

Substructure: Plywood or OSB to be a nominal 5/8 inch thick.


Stiffener Ribs


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