CSLB C-39 Roofing ContractorSteep-Slope RoofingMedium
A metal roofing contractor is installing a standing seam copper roof system and must account for thermal expansion and contraction. What is the typical spacing for concealed clips along the standing seams?
- A24 inches on center
- B36 inches on center
- C12 inches on center
- D6 inches on center
Show answer & explanationAnswer & explanation
Correct answer: C. 12 inches on center
Standing seam metal roof clips are typically spaced 12 inches on center to allow panels to expand and contract with temperature changes while remaining securely attached to the deck without restricting movement.
Why the other options are wrong
- A. 24 inches would be too widely spaced, risking panel flutter or detachment.
- B. 36 inches is far too wide for adequate wind and movement support.
- D. 6 inches is closer spacing than typically required and restricts panel movement.
Standing Seam Clip Spacing
The interval at which concealed clips attach metal roof panels to the deck, allowing thermal movement.
- Typical spacing: 12in on center
- Clips allow expansion/contraction without panel damage
- Spacing may tighten in high-wind zones
Memory trick: Twelve inches lets metal breathe with the seasons.