Standing-Seam Panels Need to Move
Long metal panels change length as temperatures change.
The roof attachment system has to account for that movement.
What Is a Fixed Clip?
A fixed clip secures the panel without built-in sliding movement.
It may be appropriate for certain:
- Panel lengths
- Roof systems
- Designs
What Is a Floating Clip?
A floating clip includes controlled movement that allows the panel to expand and contract relative to its attachment.
SFS notes that floating clips are commonly used where longer panels need greater thermal movement capability.
Does Every Standing-Seam Roof Need Floating Clips?
No.
The panel manufacturer and engineered system determine:
- Clip type
- Spacing
- Movement allowance
Why Is This Important?
Poor movement planning can contribute to:
- Panel stress
- Distortion
- Fastener problems
- Flashing stress
Concealed Fasteners Still Need a Plan for Thermal Movement.
Envirotech Exteriors considers panel length, clip system, flashing, and roof geometry when planning standing-seam roofing.