TinnerFlow™3rd YearYELLOW · Check FirstMulti-Section Louver Expansion Buckle
Long aluminum louver banks expand and contract. Use the factory splice/expansion detail instead of bolting every section rigidly tight.
A multi-section louver is not one solid chunk. Long aluminum runs need controlled movement at mullion joints, or heat can push the frames into each other and buckle the assembly.
Check the factory splice plates, gutter channels, expansion joint notes, and mullion alignment. The recovery is to disassemble the rigid joint, reset spacing per the submittal, and install sliding splice/gutter parts with flexible sealant where required.
Do not fasten multi-section louver frames tight together with no movement path unless the manufacturer detail specifically calls for it.
Thermal movement can buckle frames, split seals, and create water leaks.
Final direction belongs to the foreman, approved drawings/specs, manufacturer instructions, pressure/material schedule, employer policy, and AHJ/code requirements.