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Medallion-Lok Snap Lock Panels
Elegant 1.75" snap-together standing seam panel delivering architectural style and superior weathertightness.
Medallion-Lok is a sleek, concealed-fastener standing seam panel with a 1¾-inch rib height, offering a premium architectural look with exceptional weather resistance. Designed for long-term performance and modern aesthetics, Medallion-Lok is ideal for a wide variety of projects.
Medallion-Lok - Snap Standing Seam Specs at a Glance
Panel Type
Rib Height
Cover Width
Factory Panel Length
Onsite Forming Available
Substrate / Gauges
Installation
Finishes
Minimum Slope
Concealed fastener standing seam
1.75"
12", 16", 18"
Up to 75' (varies by manufacturing facility)
No
Std: 24 GA Galvalume® Opt: 22 GA Galvalume®, .032 Aluminum
Solid deck or open framing
Kynar 500® (PVDF)
3:12
Medallion-Lok - Ideal Applications
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Architectural and high-end commercial roofing projects requiring clean lines and quick installation.
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Residential roofs and walls seeking a sleek, modern appearance with concealed fasteners.
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Medium-slope applications (minimum 3:12) requiring high wind and water performance.
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Institutional or civic buildings where long-term aesthetics and performance are equally important.
Medallion-Lok Top 3 Benefits
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Quick Installation
Installs easily with a simple snap-together design—eliminating the time, tools, and expense required for mechanically seamed systems.
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Long-Lasting Performance
Engineered as a concealed-fastener standing seam panel, it offers superior weather-tightness and durability — protecting your investment for decades.
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Low Maintenance & Energy Efficient
Available in Cool Roof colors with Kynar 500® finishes, Medallion-Lok resists fading, chalking, and corrosion while helping reduce cooling costs.
Resources
Color Charts
Architectural Color ChartCAD Drawings
Medallion-Lok Curb Details Medallion-Lok Eave Drip Trim - Nail Base Medallion-Lok Eave Drip Trim - Nail Base Medallion-Lok Eave Drip Trim - Plywood Medallion-Lok Eave Drip Trim - Plywood Medallion-Lok Eave Drip Trim - Rigid Insulation / Metal Deck Medallion-Lok Eave Drip Trim - Rigid Insulation / Metal Deck Medallion-Lok Eave w/ Gutter - Nail Base Medallion-Lok Eave w/ Gutter - Nail Base Medallion-Lok Eave w/ Gutter - Plywood Medallion-Lok Eave w/ Gutter - Plywood Medallion-Lok Eave w/ Gutter - Rigid Insulation / Metal Deck Medallion-Lok Eave w/ Gutter - Rigid Insulation / Metal Deck Medallion-Lok Eave w/o Gutter - Nail Base Medallion-Lok Eave w/o Gutter - Nail Base Medallion-Lok Eave w/o Gutter - Plywood Medallion-Lok Eave w/o Gutter - Plywood Medallion-Lok Eave w/o Gutter - Rigid Insulation / Metal Deck Medallion-Lok Eave w/o Gutter - Rigid Insulation / Metal Deck Medallion-Lok Hi-Side Tie-In - Nail Base Medallion-Lok Hi-Side Tie-In - Nail Base Medallion-Lok Hi-Side Tie-In - Plywood Medallion-Lok Hi-Side Tie-In - Plywood Medallion-Lok Hi-Side Tie-In - Rigid Insulation / Metal Deck Medallion-Lok Hi-Side Tie-In - Rigid Insulation / Metal Deck Medallion-Lok Hip - Nail Base Medallion-Lok Hip - Nail Base Medallion-Lok Hip - Plywood Medallion-Lok Hip - Plywood Medallion-Lok Hip - Rigid Insulation / Metal Deck Medallion-Lok Hip - Rigid Insulation / Metal Deck Medallion-Lok Rake (Off Module) - Nail Base Medallion-Lok Rake (Off Module) - Nail Base Medallion-Lok Rake (Off Module) - Plywood Medallion-Lok Rake (Off Module) - Plywood Medallion-Lok Rake (Off Module) - Rigid Insulation / Metal Deck Medallion-Lok Rake (Off Module) - Rigid Insulation / Metal Deck Medallion-Lok Rake - Nail Base Medallion-Lok Rake - Nail Base Medallion-Lok Rake - Plywood Medallion-Lok Rake - Plywood Medallion-Lok Rake - Rigid Insulation / Metal Deck Medallion-Lok Rake - Rigid Insulation / Metal Deck Medallion-Lok Rake Tie-In (Off Module) - Nail Base Medallion-Lok Rake Tie-In (Off Module) - Nail Base Medallion-Lok Rake Tie-In (Off Module) - Plywood Medallion-Lok Rake Tie-In (Off Module) - Plywood Medallion-Lok Rake Tie-In (Off Module) - Rigid Insulation / Metal Deck Medallion-Lok Rake Tie-In (Off Module) - Rigid Insulation / Metal Deck Medallion-Lok Rake Tie-In - Nail Base Medallion-Lok Rake Tie-In - Nail Base Medallion-Lok Rake Tie-In - Plywood Medallion-Lok Rake Tie-In - Plywood Medallion-Lok Rake Tie-In - Rigid Insulation / Metal Deck Medallion-Lok Rake Tie-In - Rigid Insulation / Metal Deck Medallion-Lok Ridge (Vented) - Nail Base Medallion-Lok Ridge (Vented) - Nail Base Medallion-Lok Ridge (Vented) - Plywood Medallion-Lok Ridge (Vented) - Plywood Medallion-Lok Ridge (Vented) - Rigid Insulation / Metal Deck Medallion-Lok Ridge (Vented) - Rigid Insulation / Metal Deck Medallion-Lok Ridge - Nail Base Medallion-Lok Ridge - Nail Base Medallion-Lok Ridge - Plywood Medallion-Lok Ridge - Plywood Medallion-Lok Ridge - Rigid Insulation / Metal Deck Medallion-Lok Ridge - Rigid Insulation / Metal Deck Medallion-Lok Valley - Nail Base Medallion-Lok Valley - Nail Base Medallion-Lok Valley - Plywood Medallion-Lok Valley - Plywood Medallion-Lok Valley - Rigid Insulation / Metal Deck Medallion-Lok Valley - Rigid Insulation / Metal Deck Medallion-Lok Roof Curb Details Medallion-Lok Eave Drip Detail Medallion-Lok Eave Drip with Fascia Panel Detail Medallion-Lok Eave Detail Medallion-Lok Eave Detail Medallion-Lok Eave with Fascia Panel Detail Medallion-Lok Eave with Fascia Panel Detail Medallion-Lok Eave with Gutter Detail Medallion-Lok Eave with Gutter Detail Medallion-Lok Floating Hip Detail Medallion-Lok Floating Hi-Side Tie-In Detail Medallion-Lok Floating Rake Detail Medallion-Lok Floating Rake Detail Medallion-Lok Floating Rake Tie-In Detail Medallion-Lok Floating Rake Turn-Up (Off Module) Detail Medallion-Lok Floating Rake Turn-Up Detail Medallion-Lok Floating Ridge Detail Medallion-Lok Fixed Hip Detail Medallion-Lok Fixed Hi-Side Tie-In Detail Medallion-Lok Fixed Ridge Detail Medallion-Lok High Eave Detail Medallion-Lok Hip/Ridge Detail Medallion-Lok High Eave Detail Medallion-Lok Hi-Side Tie-In Detail Medallion-Lok Pipe Penetration Detail Medallion-Lok Pipe Penetration Detail Medallion-Lok Rake (Alt.) Detail Medallion-Lok Rake (Off Module) Detail Medallion-Lok Rake (Off Module) Detail Medallion-Lok Rake Detail Medallion-Lok Rake Detail Medallion-Lok Rake Tie-In (Off Module) Detail Medallion-Lok Rake Tie-In (Off Module) Detail Medallion-Lok Rake Tie-In Detail Medallion-Lok Rake Tie-In Detail Medallion-Lok Ridge (Vented) Detail Medallion-Lok Valley Detail Medallion-Lok Valley Detail Medallion-Lok Curb Install - Nail Base Medallion-Lok Curb Install - Plywood Medallion-Lok Curb Install - Purlin Medallion-Lok Curb Install - R.I. / Metal Deck Medallion-Lok Alternate Dektite Install - Nail Base Medallion-Lok Alternate Dektite Install - Plywood Medallion-Lok Alternate Dektite Install - Purlin Medallion-Lok Alternate Dektite Install - R.I. / Metal DeckPDF Drawings
Medallion-Lok Drawing Files Medallion-Lok Eave Drip Trim - Nail Base Medallion-Lok Eave Drip Trim - Nail Base Medallion-Lok Eave Drip Trim - Plywood Medallion-Lok Eave Drip Trim - Plywood Medallion-Lok Eave Drip Trim - Rigid Insulation / Metal Deck Medallion-Lok Eave Drip Trim - Rigid Insulation / Metal Deck Medallion-Lok Eave w/ Gutter - Nail Base Medallion-Lok Eave w/ Gutter - Nail Base Medallion-Lok Eave w/ Gutter - Plywood Medallion-Lok Eave w/ Gutter - Plywood Medallion-Lok Eave w/ Gutter - Rigid Insulation / Metal Deck Medallion-Lok Eave w/ Gutter - Rigid Insulation / Metal Deck Medallion-Lok Eave w/o Gutter - Nail Base Medallion-Lok Eave w/o Gutter - Nail Base Medallion-Lok Eave w/o Gutter - Plywood Medallion-Lok Eave w/o Gutter - Plywood Medallion-Lok Eave w/o Gutter - Rigid Insulation / Metal Deck Medallion-Lok Eave w/o Gutter - Rigid Insulation / Metal Deck Medallion-Lok Hi-Side Tie-In - Nail Base Medallion-Lok Hi-Side Tie-In - Nail Base Medallion-Lok Hi-Side Tie-In - Plywood Medallion-Lok Hi-Side Tie-In - Plywood Medallion-Lok Hi-Side Tie-In - Rigid Insulation / Metal Deck Medallion-Lok Hi-Side Tie-In - Rigid Insulation / Metal Deck Medallion-Lok Hip - Nail Base Medallion-Lok Hip - Nail Base Medallion-Lok Hip - Plywood Medallion-Lok Hip - Plywood Medallion-Lok Hip - Rigid Insulation / Metal Deck Medallion-Lok Hip - Rigid Insulation / Metal Deck Medallion-Lok Rake (Off Module) - Nail Base Medallion-Lok Rake (Off Module) - Nail Base Medallion-Lok Rake (Off Module) - Plywood Medallion-Lok Rake (Off Module) - Plywood Medallion-Lok Rake (Off Module) - Rigid Insulation / Metal Deck Medallion-Lok Rake (Off Module) - Rigid Insulation / Metal Deck Medallion-Lok Rake - Nail Base Medallion-Lok Rake - Nail Base Medallion-Lok Rake - Plywood Medallion-Lok Rake - Plywood Medallion-Lok Rake - Rigid Insulation / Metal Deck Medallion-Lok Rake - Rigid Insulation / Metal Deck Medallion-Lok Rake Tie-In (Off Module) - Nail Base Medallion-Lok Rake Tie-In (Off Module) - Nail Base Medallion-Lok Rake Tie-In (Off Module) - Plywood Medallion-Lok Rake Tie-In (Off Module) - Plywood Medallion-Lok Rake Tie-In (Off Module) - Rigid Insulation / Metal Deck Medallion-Lok Rake Tie-In (Off Module) - Rigid Insulation / Metal Deck Medallion-Lok Rake Tie-In - Nail Base Medallion-Lok Rake Tie-In - Nail Base Medallion-Lok Rake Tie-In - Plywood Medallion-Lok Rake Tie-In - Plywood Medallion-Lok Rake Tie-In - Rigid Insulation / Metal Deck Medallion-Lok Rake Tie-In - Rigid Insulation / Metal Deck Medallion-Lok Ridge (Vented) - Nail Base Medallion-Lok Ridge (Vented) - Nail Base Medallion-Lok Ridge (Vented) - Plywood Medallion-Lok Ridge (Vented) - Plywood Medallion-Lok Ridge (Vented) - Rigid Insulation / Metal Deck Medallion-Lok Ridge (Vented) - Rigid Insulation / Metal Deck Medallion-Lok Ridge - Nail Base Medallion-Lok Ridge - Nail Base Medallion-Lok Ridge - Plywood Medallion-Lok Ridge - Plywood Medallion-Lok Ridge - Rigid Insulation / Metal Deck Medallion-Lok Ridge - Rigid Insulation / Metal Deck Medallion-Lok Valley - Nail Base Medallion-Lok Valley - Nail Base Medallion-Lok Valley - Plywood Medallion-Lok Valley - Plywood Medallion-Lok Valley - Rigid Insulation / Metal Deck Medallion-Lok Valley - Rigid Insulation / Metal Deck Medallion-Lok Curb Details Medallion-Lok Roof Curb Details Medallion-Lok Eave Drip Detail Medallion-Lok Eave Drip with Fascia Panel Detail Medallion-Lok Eave Detail Medallion-Lok Eave Detail Medallion-Lok Eave with Fascia Panel Detail Medallion-Lok Eave with Fascia Panel Detail Medallion-Lok Eave with Gutter Detail Medallion-Lok Eave with Gutter Detail Medallion-Lok Floating Hip Detail Medallion-Lok Floating Hi-Side Tie-In Detail Medallion-Lok Floating Rake Detail Medallion-Lok Floating Rake Detail Medallion-Lok Floating Rake Tie-In Detail Medallion-Lok Floating Rake Turn-Up (Off Module) Detail Medallion-Lok Floating Rake Turn-Up Detail Medallion-Lok Floating Ridge Detail Medallion-Lok Fixed Hip Detail Medallion-Lok Fixed Hi-Side Tie-In Detail Medallion-Lok Fixed Ridge Detail Medallion-Lok High Eave Detail Medallion-Lok Hip/Ridge Detail Medallion-Lok High Eave Detail Medallion-Lok Hi-Side Tie-In Detail Medallion-Lok Pipe Penetration Detail Medallion-Lok Pipe Penetration Detail Medallion-Lok Rake (Alt.) Detail Medallion-Lok Rake (Off Module) Detail Medallion-Lok Rake (Off Module) Detail Medallion-Lok Rake Detail Medallion-Lok Rake Detail Medallion-Lok Rake Tie-In (Off Module) Detail Medallion-Lok Rake Tie-In (Off Module) Detail Medallion-Lok Rake Tie-In Detail Medallion-Lok Rake Tie-In Detail Medallion-Lok Ridge (Vented) Detail Medallion-Lok Valley Detail Medallion-Lok Valley Detail Medallion-Lok Curb Install - Nail Base Medallion-Lok Curb Install - Plywood Medallion-Lok Curb Install - Purlin Medallion-Lok Curb Install - R.I. / Metal Deck Medallion-Lok Alternate Dektite Install - Nail Base Medallion-Lok Alternate Dektite Install - Plywood Medallion-Lok Alternate Dektite Install - Purlin Medallion-Lok Alternate Dektite Install - R.I. / Metal DeckSpanish Installation Manuals
Medallion-Lok Installation ManualEnglish Installation Manuals
Medallion-Lok Installation ManualMetal Panel Care & Maintenance
Oil Canning Tech Sheet from MCA Operation and Maintenance Manual (Roofs)Product & Trim Information Books
Medallion Lok Product Information BookMiami-Dade Notice of Acceptance (NOA)
Medallion-Lok NOA #23-0112.08Specifications
Medallion-LokUL 580 Construction Numbers
UL 580 - Medallion-Lok #255 (open framing) UL 580 - Medallion-Lok #343 (plywood) UL 580 - Medallion-Lok #468 (metal deck)ASTM E283 (Air) & ASTM E331 (Water)
ASTM E283/E331 - Medallion-LokApprovals
Fire Resistance (UL263) Ratings Fire Resistance (UL790) Ratings Florida Product Approvals Non-Structural Florida Product Approvals Structural Impact Resistance (UL 2218) Class 4 Miami Dade Approvals Texas Department of Insurance Windstorm ApprovalsASTM E1592 Uplift Tests
ASTM E1592 - Medallion-Lok 16" 22 Ga. ASTM E1592 - Medallion-Lok 16" 24 Ga. ASTM E1592 - Medallion-Lok 18" 22 Ga. ASTM E1592 - Medallion-Lok 18' 24 Ga.Miscellaneous Information
99-418-23 Curb Requirements for WTWMedallion-Lok - 12"
Customize your submittal package Medallion-Lok - 12"
Click on your desired documents below to select them for your package.
General Product and Warranty Information
Panel Load Tables w/Section Properties and Testing
Safety Data and Material Safety Data Sheets
Medallion-Lok - 16"
Customize your submittal package Medallion-Lok - 16"
Click on your desired documents below to select them for your package.
General Product and Warranty Information
Panel Load Tables w/Section Properties and Testing
Safety Data and Material Safety Data Sheets
Medallion-Lok - 18"
Customize your submittal package Medallion-Lok - 18"
Click on your desired documents below to select them for your package.
General Product and Warranty Information
Panel Load Tables w/Section Properties and Testing
Safety Data and Material Safety Data Sheets
Compare our most popular panels using the tool below.
For information on all McElroy Metal products, visit our full product library.
Panel
Seam Type
Rib Height
Panel Widths
Minimum Slope
Install Substrate
Clips
Substrate / Gauges
Coating
Notable Approvals/ Tests
Medallion-Lok - Snap Standing Seam
Snap lock (hidden clips)
1.75"
12", 16", 18"
3:12
Solid deck or open framing
Hidden clip (standard and UL90 variants)
Std: 24 GA Galvalume® Opt: 22 GA Galvalume®, .032 Aluminum
Kynar 500® (PVDF)
UL 580 Class 90; ASTM E1592; UL 2218 Class 4; UL 263; UL Class A; Florida 1747.5 & 1832.7; ICC-ES ESL-1082; ASTM E1680/E1636; Miami-Dade
Components Gallery
Medallion-Lok Clip Standard
Medallion-Lok Clip UL90
Factory Eave Notch
Eave Notch Folded in Field
Medallion-Lok Clip Standard
Medallion-Lok Clip UL90
Factory Eave Notch
Eave Notch Folded in Field
Weathertightness Warranties
If your project requires a Weathertightness Warranty and you don’t already have a job-specific Pre-Approval Form issued by McElroy Metal, click the button below to get started.
Shop Drawing Service
Running short of time to complete your own shop drawings? McElroy Metal can help. Click the button below to provide us some basic information and we’ll be in touch soon to discuss your project specifics.
Download Shop Drawings
If you’re creating your own shop drawings, click the button below to gain full access to our CAD and PDF Files.
Medallion-Lok Wall Panels
Need a concealed fastener wall panel option that installs quickly while offering decades-long curb appeal? McElroy has you covered with our Medallion-Lok wall profile.
Available in panel widths of 12”, 16”, & 18”, Medallion-Lok wall panels feature:
- In-seam sealant for superior weather resistance
- Integrated snap connection for faster installation
- Multiple pan conditions—striated, ribbed, or flat—for customized aesthetics
Contact a McElroy Metal representative to discuss Medallion-Lok wall applications or request a quote for your next project.
Notes & Manufacturing Locations
- Manufactured in Clinton, IL; Peachtree City, GA; Adelanto, CA; and Sunnyvale, TX.
- Factory eave notch available upon request
-
Panels include factory-applied sealant
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Pan Condition Choices:
• Striated-recommended for most applications
• Ribbed
• Flat Pan - Additional Material Options: (Note: Minimum quantity and additional lead-time may apply)
• 22 GA Galvalume®
• 0.032" aluminum - Oil canning is a natural occurrence in metal panels and not a cause for rejection.
Why Choose McElroy Metal
McElroy Metal is an employee-owned manufacturer with more than six decades of experience producing high-quality metal roofing, wall systems, and substructural components. Our nationwide manufacturing and service center network ensures consistent availability, responsive support, and dependable delivery. Built on a culture of craftsmanship and partnership, our products are engineered for long-term durability and trusted performance on projects of every size.
Find a Distributor / Contractor Near You
Whether you’re building a new home or planning renovations, a metal roof can deliver long-term cost savings and comfort. To explore your options and find the product that meets your aesthetic and budgetary needs, contact a McElroy Metal distributor or contractor in your area today. We can’t wait to help make your dream home a reality.
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Frequently Asked Questions
The questions below address common considerations and help guide product selection for your project.
What makes Medallion-Lok different from other standing seam panels?
Medallion-Lok is an economical standing seam panel, featuring a 1 ¾” rib height, an integrated batten and in-seam sealant. It delivers superior performance on medium-slope architectural and commercial roofs where long panel runs and watertight seams are essential.
Can Medallion-Lok be used for wall applications?
Yes. Medallion-Lok can be installed vertically on walls for a sleek, continuous-rib aesthetic in commercial or high-end residential designs.
What deck type is required for installation?
Medallion-Lok can be installed over solid decking or open framing to ensure proper clip attachment and seam performance.
What finish options are available?
Standard finishes include Kynar 500® (PVDF) coatings on 24 GA Galvalume® substrate, providing exceptional color retention and weather protection. For non-painted applications, we offer Galvalume® Plus (acrylic-coated).
Medallion-Lok Articles
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