Maxima Standing Seam Panel

Maxima Standing Seam Panel

With an opportunity to choose from three distinct Maxima profiles: Maxima, Maxima 1.5 and Maxima ADV, McElroy’s Maxima family of products represents the industry’s broadest selection of vertical leg standing seam systems. In order to meet the varying needs of architects and contractors, each offers unique performance characteristics that enable users to match a Maxima panel to specific aesthetic and performance specifications.

In some cases, Maxima panels can be produced on-site by McElroy factory technicians.  Maxima 1.5" & 2" panels can also be curved for use with radius roof situations.

All Maxima panels are mechanically seamed. Mechanical seamers and hand crimpers are available for rent through Developmental Industries (DI) at, a website created just for McElroy Metal customers. The rental fees for each type of equipment can be found on this site as well as additional information you may need to be aware of within the terms and conditions. DI is the only approved supplier for this type of equipment.

McElroy Metal provides factory eave notching on Maxima standing seam panels.

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Specifications & Details

Profile Mechanically seamed
Sealant Factory applied (on non-curved panels only)
2" factory-formed eave notch Upon request
Minimum slope for 1.5" 1:12
Minimum slope (for 2") 1/2:12
Minimum slope (for 3") 1/4:12
Installation Can be installed over solid deck or open framing
Thermal Movement Floating clips allow for 3 1/8"
Note Maxima 2" and ADV also available jobsite formed for long lengths
Manufacturing Facilities Maxima1.5": Peachtree City, GA, Houston, TX
Maxima 2": Clinton, IL; Peachtree City, GA; Adelanto, CA; Sunnyvale, TX; Houston, TX
Maxima 3": Peachtree City, GA
Aluminum - Sunnyvale, TX only
Note Oil canning is a natural occurrence in metal panels and is not a cause for panel rejection.
Fire Rating Class A
Uplift Test UL580 Class 90, FM 4471 (2" only) (1-90 Rated), ASTM E1592 (1.5", 2" & 3")
Air Infiltration ASTM E1680
Water Infiltration ASTM E1646
Class 4 Impact Resistance UL 2218
Florida State Approval 1747.3, 1832.4 (2" & 3")
Fire Resistance UL263
Miami-Dade Approval (2:16 Only) NOA #17-0320.04
ICC-ES Approval ESL-1082
Note All testing conducted with Galvalume® substrate. No testing available with aluminum.
Testing Data For available Test Data, Section Properties or Load Tables, please visit our downloads section.
Panel Options
Seam Height 1.5”, 2” & 3”
Seam Style 2" and 3" - 90 Degree Seam
1.5" and ADV - 180 Degree Seam
Panel Width - Maxima 1.5"; 2" & ADV: 12", 16", 18"
- Maxima 3": 18", 24"
Panel Configurations - Maxima 1.5"; 2" & ADV: Flat, Striated, Pencil Ribs, Minor ribs (3" only)
- Maxima 1.5" and ADV can be curved
Coating Kynar 500® (PVDF)
Substrate - Standard 24 GA Galvalume®
- Options 22 GA Galvalume
- Optional .032 and .040 aluminum

Availability Chart

Maxima Availability Chart

Maxima Attributes

Curving Information

  • Only Maxima 1.5 and Maxima ADV can be curved.
  • Minimum radius (steel): Maxima 1.5 - 12’ and Maxima ADV – 25’
  • 180 degree seam required
  • Sealant to be field applied on curved applications
  • Maxima 1.5 and Maxima ADV flat panels will curve naturally on a radius of 250’ or greater

Curved Images

Related Files


CAD Drawings

PDF Drawings


Product & Trim Information Books

Installation Manuals

Information Flyers

Product Approval Report / Miami-Dade Notice of Acceptance (NOA)

Product Approval Report / ICC-ES Approvals

Technical Bulletins / Miscellaneous Testing

Get A Submittal Package

Maxima 1.5 - 12"
Customize (Recommended)

Customize your submittal package Maxima 1.5 - 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