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Industrial & Commercial Pre-Engineered Building Systems

KEYSTONE STEEL BUILDINGS™

Architectural Roof Panels

SEAM-LOK 
Seam Lok is the classic mechanically seamed trapezoidal roof panel designed for low slope industrial applications. Manufactured from 24 or 22 gauge Galvalume® substrate with 3" nominal seam height. Seam Lok has factory applied sealant, utilizes a concealed clip application allowing for thermal movement, and 360 degree seaming, making a weather tight installation. Seam Lok has FM and UL90 approval ratings. Available in 18" or 24" widths, up to 50' long. Galvalume® and 12 standard colors available. Lengths up to 75'-0" available requiring special delivery fee.
VERTICAL-LOK 
Vertical Lok is an architectural roof panel with 2" nominal seam height, with 2 minor ribs to help prevent oil canning. Manufactured from 24 or 22 gauge Galvalume® substrate with factory applied sealant utilizing concealed clip application for thermal movement and 360 degree seaming, making a weather tight installation. Available in 18" width, up to 50' long. Galvalume® and 12 standard colors available. 

BOTH PANEL TYPES REQUIRE A MECHANICAL SEAMING TOOL RENTED FROM OUR FACTORY, AND BOTH TYPES HAVE A WEATHER TIGHTNESS WARRANTY AVAILABLE.