Roof Problems · For owners & managers
HVAC Curb and Rooftop Unit Leaks
Rooftop units sit on curbs that pass through the roof. These are frequent leak points.
Causes
Common issues:
- Flashing that never reached full height
- Damage when units are replaced
- Condensate lines dripping on membrane
- Loose unit panels letting rain inside the curb
Is it the roof or the unit?
Some leaks come through the unit itself. A joint visit with HVAC and roofing can find the true cause.
Prevent repeats
Walk pads, a rooftop sign-in log, and a roofer check after any unit swap.
Common questions
- Who pays for curb leaks?
- It depends on the cause and contracts.
- Can curbs be raised?
- Yes, during re-roofing if needed.