Static field route #19068

What do I do when rooftop curb counter-flashing is letting rain under the unit?

Equipment Connections: RTU, AHU, VAV, Fans & Louvers🟥 STOP / VERIFYV190 answer-gap expansion

📖 Verified core answer

Water behind curb flashing is a stop-and-fix condition. Verify the roofing/detail overlap, counter-flashing, sealant, and who owns the repair before the leak damages the building.

Open in Field Rescue Open category

Field verification checklist

Find where water enters: top lip, corners, fasteners, seams, curb base, membrane termination, or unit base.
Check approved roof curb/flashing detail and roofing scope.
Look for short flashing, missing hem, bad corner, loose fasteners, or failed sealant.
Protect the opening from rain while the fix is coordinated.
Photo before/after because roof leaks become blame magnets.

Ask foreman

Water is getting behind the counter-flashing at [unit/location]. I traced the leak path and checked the roof detail. Do you want roofing/GC involved, or should we remake the flashing per the approved curb detail?

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 bury a known roof leak under exterior caulk without correcting the flashing path.

Why this matters

Roof curb leaks can damage ceilings, insulation, equipment, electrical components, and finished spaces below.

Verification basis

Approved drawings/specs, project coordination drawings, manufacturer instructions/submittals, shop standards, foreman/detailer direction, employer policy, and AHJ/code requirements.