Apprentice answer

What happens if an outside-air intake louver is covered from behind

2nd YearRoof Curbs, Louvers & Exterior AirStop and Get Direction

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.

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Plain-English answer

If a wall panel, plywood, or façade layer covers the back of an intake louver, the louver may look finished outside but be dead behind the wall.

Stop the covering trade before it gets buried. Verify the louver free path, duct/plenum connection, bird screen, and approved opening. Get the obstruction removed or re-framed so outside air can actually enter the system.

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?

Verify before acting

Use this as training guidance. Foreman direction, approved drawings, project specs, manufacturer instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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