Built on Montana values, at Protech Steel we are defined by integrity, reliability, and craftsmanship—delivering premium metal roofing, siding, trim accessories and more.
673 Vaughn S. Frontage Rd, Great Falls, MT
3280 Clearwater Dr. Billings, MT
6940 N Montana Ave, Helena, MT
1-888-21-STEEL
info@protechsteel.com
The 1.5″ Mechanical Lock panel is a time-tested standing seam system known for its strength, weathertight performance, and proven reliability across commercial, industrial, and architectural applications.
Its mechanically seamed design, concealed fastener system, and superior weathertight performance make it a dependable, high-performance choice for demanding roofing applications.
The 1.5″ Mechanical Lock panel’s precision seaming and watertight design make it a durable, high-performance solution for roofing demanding commercial, industrial, and architectural projects.
The 1.5″ Mechanical Lock panel is a high-performance steel system designed to deliver reliability in commercial, industrial, and architectural applications.
Certified to meet UL wind uplift standards for dependable performance in high-wind conditions.
The 1.5″ Mechanical Lock panel features a tight mechanically seamed, interlocking design that allows for zero water intrusion, making it a reliable choice for low-slope and high-exposure applications where watertight performance is critical.
View more of our color options for the 1.5″ Mechanical Lock and more at our color options page!
24g Color Options
View more of our color options for the 1.5″ Mechanical Lock and more at our color options page!
The 1.5″ Mechanical Lock panel is available in multiple gauge and color options, offering flexibility for commercial, industrial, and architectural applications. Designed for low-slope roofs and long panel runs, its 16″ width and strong spanning capability provide reliable performance across demanding projects. With options for fixed or sliding clips to manage structural needs and thermal movement, this system requires a mechanical seamer for installation, delivering a secure, weathertight, and professional finished appearance.
A UL wind uplift rating verifies a panel’s ability to resist uplift forces caused by high winds through controlled pressure testing. The 1.5" Mechanical Lock Panel meets UL 580 Class 90, confirming its ability to withstand significant wind loads while maintaining secure attachment and long-term performance.
A UL Class 4 impact rating represents the highest level of impact resistance, requiring panels to withstand repeated steel-ball impact testing without failure. The Tuff-Rib panel meets these UL standards, demonstrating proven durability and long-term performance in severe hail and extreme weather conditions.
Learn more about the 1.5″ Mechanical Lock’s installation process and trim details by downloading the full installation manual.
3' TUFF RIB
GENERAL DATA SHEET
A General Data Sheet is a concise technical overview that highlights a product’s key specifications and performance ratings. For the 1″ Nail Strip panel, it includes panel dimensions, gauge and color options, UL testing data, warranty information, and approved residential and light commercial applications.
© 2025 Protech Steel