Drips Under The Unit
Water lands near the supply duct below a rooftop unit.
Curb corners split as the unit vibrates. Reinforced corners and new flashing stop it.

As a Princeton commercial roof repair contractor, we repair plant and warehouse roofs across Gibson County, focusing on the curbs and penetrations under rooftop equipment.
Princeton commercial roof repair on busy plant roofs usually centers on equipment: units, exhaust fans, ducts, and the curbs under them.

Every curb is a seam in the roof. Units vibrate, technicians kneel and drag tools beside them, and condensate drips onto the membrane, so curb corners and the membrane around them wear out first.
We re-flash curbs with reinforced corners, route condensate lines to drains, and set walk pads along the paths technicians use. That keeps the next service visit from starting the next leak.
What shows up under equipment-heavy roofs.
Water lands near the supply duct below a rooftop unit.
Curb corners split as the unit vibrates. Reinforced corners and new flashing stop it.
New drips start a few days after HVAC work on the roof.
Dropped screws and dragged tools punctured the membrane along the service path.
Stains spread in summer even when it has not rained.
Condensate lines dump onto the roof, and water backs under the curb flashing.
The deck flexes under foot traffic near equipment rows.
Insulation around the curbs is wet. Cores show how far to cut it out.
Drips form around a wall or ceiling exhaust outlet.
The flashing collar on the fan curb cracked or lost its sealant in summer heat.
How equipment-heavy roofs change after repairs.
Before The Repair
After The Repair
These services cover equipment-heavy roofs from the membrane to the metal.

Low-slope plant and warehouse roofs get curb flashing, seams, drains, and wet boards repaired in matching membrane.
Typical Repairs

Steel buildings with units on the panels get curbs, laps, and screws repaired so water flows around the equipment.
Typical Repairs

Drips under equipment get traced to the curb, collar, or condensate line that lets water in.
Typical Repairs

Plant roofs get repairs staged around production, with protection over lines below every opening.
Typical Repairs
Send the equipment count and roof size. We map every curb and price the repairs.
Get A Free EstimateFive decisions for roofs crowded with equipment.
We walk every equipment row and check each curb, collar, duct, and condensate line, plus the membrane between them.
Stains below are matched to the units above, and those curbs go to the top of the list.
HVAC and electrical contractors get noted so walk pads go where they walk.
Only units being flashed are shut down, and only for the time the flashing takes.
Photos of every repaired curb go into your file, keyed to the unit it serves.
Have a building outside Princeton? We repair commercial roofs in the towns below as well; for anywhere else, call us or send us a message.
Several roofs on one property, ranked in one visit.
Older brick blocks with parapet and coping leaks.
Stopgap seals first, permanent repairs in dry weather.
Roofs with years of old patches to sort out.
Answers on equipment, service traffic, and coverage.
Coverage
Yes. Plants, warehouses, and metal buildings in Princeton are part of our repair work. Repairs are scheduled around shifts, and the curbs under rooftop equipment are checked and re-flashed during the work. Call to talk through the damage and timing.
Yes. A single split curb corner is worth repairing quickly, since water around a curb soaks the insulation fast. Small curb repairs are often grouped with other work nearby to make the trip count.
Equipment
They have to reach the units, so the answer is walk pads along their routes. Pads take the wear instead of the membrane, and they show technicians where to step. Ask service contractors to report any dropped screws or cuts after each visit.
Many units drain condensate straight onto the roof, and that water runs back under the curb flashing or sits in low spots around the unit. Routing the line to a drain and re-flashing the curb stops it.
Hiring
Ask how they find the leak before patching, how they flash curbs on your roof system, and whether they set walk pads on service routes. Ask for photos of each repaired curb keyed to the unit. Compare written scopes line by line before comparing totals.
Send the address and the units near the drip. We check every curb and price the repairs in writing.
Or call (930) 346-3218