Static field route #19102

What do I do when siding or plywood blocks the back of an intake louver?

Coordination, Clashes, Sequencing & Rework🛑 STOP / GET DIRECTIONV191 answer-gap expansion

📖 Verified core answer

A blocked intake louver can starve outside air and create building pressure problems. Stop cover work, document the obstruction, and coordinate opening the full approved intake path.

Open in Field Rescue Open category

Field verification checklist

Look through the louver and behind the frame before cover.
Confirm the louver connects to a clear duct/plenum/opening.
Document any blocked backing board, panel, or framing.
Notify foreman/GC before exterior finishes hide the issue.
Recheck screen, flashing, and weather path after correction.

Ask foreman

The intake louver at [location] is blocked from behind by [plywood/panel/framing]. I checked the air path. Do you want the cover trade stopped and the opening cleared before we continue?

Text to foreman

Route options

AMake the field correction only if it is within your assignment and the approved method.

BHold and document the condition if the fix affects airflow, access, life safety, pressure class, rated assemblies, equipment, or another trade.

CBring the foreman/detailer the location, what you checked, and what decision you need before cover, startup, or rework.

Do not do this

Do not accept an intake louver that looks good outside but is blocked from behind.

Why this matters

A blocked outside-air path can cause negative pressure, ventilation failures, TAB problems, and expensive façade rework.

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, and AHJ/code requirements.

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