Valdosta Commercial Roofing
Leak repair

Curbs and penetrations

Every penetration through a low-slope roof is a potential leak, and a commercial roof has many — HVAC kerbs, vent stacks, conduit, pipe supports, lightning protection. Failures concentrate here because the detailing is complex and because other trades walk on, modify and sometimes fix things to these details without telling anyone. A roof survey that does not list every penetration has not been done properly.

Call (706) 696-1888

What the job involves

  • Inventory and inspection of every penetration on the roof
  • Kerb flashing, counter-flashing and cap assessment
  • Pipe support and conduit bearing check for membrane damage
  • Identification of unauthorised modifications by other trades
  • Repair reinstating the detail rather than sealing over it

Signs you need it

  • Leaks appearing after HVAC or telecoms work
  • Conduit or pipework resting directly on the membrane
  • Sealant visibly applied around a kerb by a previous visit

Where we cover

Each area has its own page for curbs and penetrations.

Questions

Our HVAC contractor was on the roof and now it leaks.

Extremely common. Service work around kerbs disturbs flashing, and equipment or tools set down on single-ply puncture it. Worth establishing a rule that any trade going on the roof is logged, and that a roofing inspection follows significant plant work.

Is pipework resting on the membrane a problem?

Yes. Unsupported conduit and pipe abrade the membrane with thermal movement and trap water beneath. Proper bearing blocks or supports are inexpensive and prevent a failure that is awkward to repair once it starts.

Related work

Describe what you are seeing

Low-slope roofs in this climate fail at details rather than in the field, and the damage is usually well advanced before water reaches a tenant space.

Call (706) 696-1888
Call (706) 696-1888