Compare McElroy standing seam systems, clips, finishes and panel choices with clear photos and an estimate checklist.
Standing seam roofs conceal the main panel attachments beneath raised seams. McElroy offers several systems, and the correct choice depends on slope, supporting structure, wind design and the look you want. This guide compares the systems without treating every standing seam panel as interchangeable.
| System | Connection | Useful distinction |
|---|---|---|
| Meridian | Snap-together, clipless | Fastens through a concealed flange |
| Medallion-Lok | Snap-together with clips | Architectural standing seam system |
| Maxima family | Mechanically seamed | Several seam heights and configurations |
| 138T / 238T | Symmetrical, mechanically seamed | Separate seam cap; individual-panel replacement capability |
Snap-together roofing
McElroy manufacturer project showing Medallion-Lok roofing.
McElroy’s Medallion-Lok project example. A snap-together seam and a mechanically closed seam require different installation details.
Mechanically seamed roofing
The cover photo shows a McElroy Maxima project. Mechanical seaming closes the specified joint using dedicated equipment. Select the exact profile and seam configuration from current technical documents.
McElroy photograph of a Maxima floating clip.
Clips are part of the engineered assembly. Fixed and floating clips have different roles; their type, spacing and fasteners are not interchangeable.
Six choices to compare
| Choice | Why it matters |
|---|---|
| Panel and seam | Controls how the system connects and sheds water |
| Slope and substrate | The selected system must suit the actual roof |
| Gauge and panel width | Affects appearance, handling and design |
| Finish and color | Compare coating type and written finish warranty |
| Pan texture | Choose flat, striated or ribbed where offered |
| Flashing and penetrations | Valleys, chimneys and pipes need compatible details |
Warranty questions
A paint or substrate warranty is different from a weathertightness warranty or contractor workmanship coverage. Ask which is actually included, who issues it, and which inspection or installation requirements apply.
Panel textures and oil canning
Our standing seam roofing service
Prepared by Barnes N’ Roofs. Reviewed September 18, 2026. Manufacturer examples are identified in captions and are not represented as our installations. Exact product availability and current written specifications control.