Static field route #19620

What do I do when sealant blocks the louver weep holes?

Sealing, Leakage, Mastic & Pressure Testing⚠️ CHECK FIRSTField answer expansion

📖 Verified core answer

Weep holes are there to drain water. Remove sealant from drainage paths and reseal only where the louver/detail allows.

Field verification checklist

Locate the factory weep holes or sill drainage channels.
Check whether silicone or paint has buried them.
Look for standing water in the louver frame.
Remove blockage without damaging the frame finish.
Verify water can drain before the exterior is accepted.

Ask foreman

The louver sill at [location] has sealant blocking the weep holes. I checked the drain path and water cannot escape. Do you want me to strip the bottom bead and reopen the weeps?

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 run a solid bead across louver drainage weeps.

Why this matters

Blocked weeps can turn a drainable louver into an internal water reservoir.

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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