About the MR-24 Roof Clip
The MR-24 roof clip is the part that holds your standing seam roof down while letting it move. A metal roof expands and contracts every day and every season. The MR-24 clip grips the purlin with a fixed base, but its tab slides so the panels float freely instead of tugging on the fasteners. That’s what keeps an MR-24 roof tight for decades. Without a floating clip, the panels work against the fasteners over time, which can cut into the panel, back the screws out, and open the roof up to leaks and wind damage.
This is the Low clip — the lower-profile version of the assembly. Clip height is matched to how much insulation sits between the purlin and the panel, so ordering the right height matters (more on that below). We supply genuine Butler MR-24 clips for new roofs, repairs, and reroofs
How the Butler MR-24 Clip Works
|
Spec |
Detail |
|
Function |
Floating panel-to-purlin attachment for MR-24 standing seam roofs |
|
Movement |
Minimum 1.25″ in each direction (about 2.5″ of total travel) |
|
Tab force |
8 lbs maximum to start the tab moving |
|
Tab |
High-strength stainless steel, factory-centered, seamed into the side lap |
|
Panel protection |
Concave bearing surface won’t pierce the panel as it moves |
|
Tab glide |
Cadmium-coated triangular bar gives the tab a smooth surface to travel on |
|
Attachment |
Screws to factory-punched purlins — clip hole matches the punched hole |
|
Design range |
Handles ±100°F difference between the building frame and the roof panels |
|
Profile |
Low — the lower-profile clip height |
Why the Clip Matters
- It lets the roof truly float. The stainless steel tab is set in the center when installed, so the roof can move the full distance in either direction as temperatures swing. It takes only about 8 pounds of force to start that movement — the roof glides instead of dragging.
- It won’t chew up your panels. The clip’s bearing surface is concave, so the moving tab rides smoothly and doesn’t dig into the underside of the panel the way a flat or sharp clip can over thousands of expansion cycles.
- It’s built stronger. Butler rates its stainless steel clip tab at 50% stronger than the tabs on most other standing seam systems — important, because the clip is what carries wind uplift on a roof that isn’t fastened straight through.
- It seams right into the roof. The tab gets rolled into the 360° Pittsburgh double-lock side seam, so the attachment is hidden inside the seam with nothing penetrating the weather surface.
Low Clip vs. High Clip — Get the Height Right
MR-24 clips come in more than one height so the panel sits at the correct plane above the purlin for the insulation in your roof.
The Low clip is the lower-profile option; a taller clip is used where there’s more insulation built into the roof.
For a repair or reroof, the new clips have to match the height your roof was built with — mix heights and the panel line and the seam won’t sit right.
What to Have Ready When You Order
- Quantity needed
- Whether it’s a new build, repair, or reroof
- Photos or measurements
Frequently Asked Questions
- What does the MR-24 roof clip do? It attaches the standing seam roof panel to the purlin while letting the roof slide as it expands and contracts. The fixed base holds and the stainless steel tab moves and is seamed into the panel’s side lap.
- How much does an MR-24 roof move? Each clip allows a minimum of 1.25 inches of movement in each direction (roughly 2.5 inches of total travel) and is designed for up to a 100°F swing between the building frame and the roof panels.
- What’s the difference between the low clip and the high clip? Clip height matches the insulation depth under the panel. The low clip is the lower-profile version; a taller clip is used with more insulation. For a replacement, order the height that matches your existing roof.
• • Can I get replacement MR-24 clips for an older roof? Yes. We supply genuine Butler MR-24 clips for repairs and reroofs.
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