Static field route #19625

What do I do when multi-section louver panels buckle because they were installed tight together?

Equipment Connections: RTU, AHU, VAV, Fans & Louvers⚠️ CHECK FIRSTField answer expansion

📖 Verified core answer

Long aluminum louver banks expand and contract. Use the factory splice/expansion detail instead of bolting every section rigidly tight.

Open in Field Rescue Open category

Field verification checklist

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.

Ask 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?

Text to foreman

Route options

A Correct it only if the fix is within your assignment and approved method.

B Hold and document if it affects water intrusion, weatherproofing, rated assemblies, structural anchorage, controls, TAB, or another trade.

C Bring the foreman/detailer the location, what you checked, and what decision you need before sealing, testing, cover, or startup.

Do not do this

Do not fasten multi-section louver frames tight together with no movement path unless the manufacturer detail specifically calls for it.

Why this matters

Thermal movement can buckle frames, split seals, and create water leaks.

Final verification

Use this as field training guidance. Final direction still comes from the foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, pressure/material schedule, and AHJ/code requirements.

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