Products / Medallion-Lok
Medallion-Lok
UL 2218 Class 4McElroy Metal's snap-lock, concealed-fastener standing seam panel with a 1 3/4-inch seam height, available in 12, 16, and 18-inch panel widths in striated, ribbed (pencil rib), or flat pan profiles. Standard substrate is 24 gauge Galvalume steel, with 22 gauge Galvalume or .032/.040 aluminum optional, finished in Acrylic Coated Galvalume or Kynar 500 PVDF. Installs on slopes down to 3:12 over solid deck or open framing.
Manufacturer
Material
Product line
Standing Seam Metal Roofing Systems
Impact class
UL 2218 Class 4Fire rating
Class A
Standards met
UL 263 Class AUL 580 Class 90UL 2218 Class 4ASTM E1592
Status
active
Class 4 insurance note
Its UL 2218 Class 4 impact rating may qualify for an impact-resistant roof insurance credit with many Colorado carriers; verify eligibility with the insurer before relying on a discount.
Sources
- mcelroymetal.com verified 2026-07-16
- ibhs.org verified 2026-07-16