Medallion-Lok

Medallion-Lok is a snap-lock standing seam metal roof panel from McElroy Metal with concealed attachment through hidden clips. It is listed for roofs and walls on residential and commercial buildings, including institutional or civic buildings, on medium-slope roofs of 3:12 or more.

The seam is a snap lock closed with hidden clips, and the panel is a concealed-fastener standing seam. Standard and UL 90 hidden clips are offered. The panel is used on walls and roofs.

• Seam height: 1 3/4 inches
• Cover widths: 12, 16 or 18 inches
• Major rib on center: 12, 16 or 18 inches
• Minimum slope: 3:12
• Substrate: solid deck or open framing
• Factory panel length: up to 75 feet, depending on the manufacturing facility
• Onsite forming: not offered

The Medallion-Lok sheet draws a striated profile as the standard, with flat pan and bead (pencil rib) profiles as options. The striated pan is drawn first, ahead of the optional flat and bead forms.

The standard material is 24-gauge Galvalume steel. 22-gauge Galvalume and .032 aluminum are available on inquiry. The standard finish is Kynar 500 PVDF, and cool roof colors are available with Kynar 500 finishes.

• Standard substrate: 24 gauge Galvalume
• On inquiry: 22 gauge Galvalume and .032 aluminum
• Coating: Kynar 500 PVDF
• Cool roof colors: available with Kynar 500 finishes

• Standard clip: 16 gauge, galvanized G90 ASTM A653 (50 ksi)
• UL-90 clip: 16 gauge, galvanized G90 ASTM A653 (50 ksi)
• Zee closure: 24 gauge ASTM A792 (50 ksi)

Listed tests and approvals are UL 263 Class A, UL 580 Class 90, UL 2218 Class 4, ASTM E1592, ASTM E1680 and E1636, TDI over plywood or metal deck and open framing, Florida Product Approval, an ICC-ES listing and Miami-Dade approval.

Medallion-Lok is not in McElroy's curved standing seam category, where only Medallion I is listed. It is one of the commercial standing seam roof panels in the McElroy range.

Other McElroy standing seam systems listed alongside it are 138T and 238T, Instaloc Snap Lock, MasterLok-90 and MasterLok-FS, Maxima, Medallion I and II, Meridian, Mirage II and Trap-Tee. The curved standing seam category lists 138T and 238T, Maxima and Medallion I.