Do not fasten multi-section louver frames tight together with no movement path unless the manufacturer detail specifically calls for it.
Check
Look for bowed mullions, cracked sealant, or frame pressure at section joints.
Check if sections were screwed rigidly together through expansion parts.
Find the factory splice/expansion hardware.
Verify water gutter/channel direction at the joint.
Reset before exterior finish locks the louver in place.
Steps
Look for bowed mullions, cracked sealant, or frame pressure at section joints.
Check if sections were screwed rigidly together through expansion parts.
Find the factory splice/expansion hardware.
Verify water gutter/channel direction at the joint.
Reset before exterior finish locks the louver in place.
Say this to your foreman
The multi-section louver at [location] is buckling at the mullion joints. I checked the splice and it looks locked tight. Do you want it reset with the factory expansion/splice detail?