Meridian

From the Total Cladding and Roofing Technical Library

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McElroy Metal Meridian metal panel profile or installed application

Meridian

Manufacturer
McElroy Metal
Product
Meridian
Status
Current
Market
United States
Last verified
September 20, 2026

Overview

Meridian is a snap-together, clipless standing seam metal roof panel from McElroy Metal for solid-deck roofs. It has concealed fasteners, and the snap seam is closed without clips. Listed applications are residential roofing, light commercial projects, retrofit or new construction, and recover applications over existing shingle roofs.

Profile and dimensions

  • Rib height: 0.91 inch
  • Cover widths: 12 inches and 16 inches
  • Major rib on center: 12 inches and 16 inches
  • Minimum slope: 3:12
  • Installation substrate: solid deck only
  • Factory panel length: up to 45 feet, depending on the manufacturing facility
  • Onsite forming: not offered

The product data sheet draws the profile with striated or minor ribs, the Meridian seam, a zee closure and a foam seam plug.

Data sheets and technical documents

Current product files and retained historical revisions.

Current

Current files

Archive

Archived files

No older reviewed revisions are archived for this product yet.

Materials and manufacture

Panels are roll formed in the factory from ASTM A792 steel with a 50 ksi yield strength, using AZ55 coating on bare material and AZ50 on painted material. The 16-inch pan is available in 24 gauge Galvalume or 26 gauge Galvalume. The 12-inch pan is 24 gauge only. Both widths come with either a minor rib or a striated pan.

Factory eave notching of 1 1/2 inches is available. The zee closure is 26-gauge ASTM A792 steel.

Finishes

  • Kynar 500 (PVDF) fluoropolymer paint
  • Galvalume Plus, an acrylic-coated finish

Colors are published on a separate Meridian color chart page.

Installation

The substrate is plywood or rigid insulation over metal deck. The panel is fastened with pancake head fasteners through the flange, and no clips are used. Oil canning is inherent in all metal panels and is not cause for panel rejection. A signed oil canning acknowledgement is required for all orders before production.

Tests and approvals

  • UL 580 Class 90 wind uplift
  • UL 263 Class A fire
  • UL 790 Class A
  • UL 2218 Class 4 impact
  • ASTM E1680 and ASTM E1646 air and water infiltration
  • Florida Product Approval FL 2358.1
  • TDI approval over plywood deck

Because the panel needs no clips, it differs from clip-based standing seam panels such as Medallion-Lok. Residential panels of this type are covered under residential standing seam roofing.