Static field route #19613

What do I do when an exterior louver is installed upside down and catches rain?

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📖 Verified core answer

Exterior louver blades and drainage paths are directional. If the louver catches rain, stop and reset it to the approved orientation before the wall is closed or weather hits.

Open in Field Rescue Open category

Field verification checklist

Check blade slope from the exterior side.
Verify the sill, gutter, and weep holes are at the bottom/outside.
Look for water tracks inside the sleeve or mechanical room.
Confirm orientation against the submittal or manufacturer label.
Reset and reseal before siding, stucco, or trim hides the frame.

Ask foreman

The louver at [location] appears upside down and is catching rain. I checked the blade slope and weep path. Do you want me to pull it and reset it to the manufacturer orientation before it gets covered?

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 caulk over an upside-down louver and hope the sealant fixes the water path.

Why this matters

Wrong orientation can turn a weather component into a funnel and cause major water damage.

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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