Stain Beside A Supply Duct
A ring forms on the ceiling tiles next to where the duct comes down.
Open Curb Corner
Flashing at a corner of the curb splits or was never sealed, and rain runs straight down the curb wall.
As a Sturgis commercial roof repair contractor, we repair leaking curbs and flashing around rooftop units, working with your electrician and HVAC contractor.



A Sturgis commercial roof repair contractor works around rooftop units more than anything else on storefront and shop roofs. When a curb repair touches power, electrical questions go to the Sturgis city office first, with the County Judge Executive office in Morganfield as the Union County contact.
Structural work in Union County goes to the state building inspector, because the county sheet leaves the local inspector line blank.
Most rooftop unit leaks show up in the ceiling near the supply ducts. These pairs point to the part of the curb behind them.
A ring forms on the ceiling tiles next to where the duct comes down.
Flashing at a corner of the curb splits or was never sealed, and rain runs straight down the curb wall.
Drips show up on dry days when the cooling has been running.
The unit drains condensate onto the membrane, and the water ponds against the curb instead of reaching a drain.
Water shows up inside the equipment or along the duct, away from the roof deck.
The gasket between the unit and the curb fails, a job done together with the HVAC crew.
Curb repairs pay off right where the unit meets the roof.
Preformed corner patches and reflashed curb bases close the spots where rain runs down beside the unit.
Rerouting the condensate line to a drain ends the daily ponding that wears out the membrane next to the curb.
Shutting down with a licensed electrician and restarting after sign-off keeps the curb repair and the wiring both in order.
Knowing the city office and county contacts before work starts keeps the curb repair from stalling halfway through.
These four repairs cover most curb and unit leaks on Sturgis buildings.
Preformed patches go over split corners after the old flashing is cleaned back to solid membrane.
Membrane that pulled away from the curb base gets new flashing carried up the curb wall.
The condensate line gets extended to the nearest drain so water stops pooling against the curb.
Working with your HVAC contractor, the joint between unit and curb gets a new gasket and seal.
Turn the unit off if water is reaching the electrical side, then call. We trace the curb and line up the electrician.
Curb work has more hands involved than most repairs, so the order matters.
We check the ceiling under the unit, then walk each curb on the roof: its corners, base, condensate line, and the seams around it.
When the repair touches power, a licensed electrician shuts the unit down, and inspection needs get confirmed with Sturgis city hall.
Corners get preformed patches, the base gets new flashing, and the disconnect gets reset where the curb work disturbed it.
The unit comes back on after the electrician signs off, and the curb gets a final look during the next rain.
If your building sits outside Sturgis, call us or send us a message. Commercial roof repair also covers the thirteen towns here.
Edge metal, decks, and rooftop units after severe weather.
Curb corners, pitch pans, and storefront roofs with mixed sections.
Fasteners, panel laps, ridge caps, and eave trim on steel buildings.
Electrical contacts, permits, curb ponding, and how often to check units.

Question about your own roof?
Call UsThe Sturgis city office comes first, with the County Judge Executive office in Morganfield as the Union County contact on the state county sheet.
When a curb repair touches power, a licensed electrician shuts the unit down, inspection needs are confirmed with city hall, the curb is reflashed, the disconnect is reset, and the unit restarts after sign-off.
Structural permits in Union County come from the state building inspector, because the county contact sheet leaves the local inspector line blank. That covers deck replacement and new framing. Curb reflashing and seam repairs count as maintenance and stay out of that process in most cases.
Usually because the condensate line drains onto the roof instead of into a drain, or because the curb sits in a low spot. Either way, standing water next to the curb tops its flashing in heavy rain. Rerouting the line and clearing the nearest drain fix most of it.
Sometimes it is the unit. Water inside the cabinet or along the ductwork points to the equipment, which your HVAC contractor checks. Water running down the outside of the curb points to the flashing. A water test on the curb alone, with the unit off, separates the two.
Twice a year, in spring and fall, plus after major storms. Curb corners, the base flashing, and condensate lines get a close look each time, since sealant around units wears faster than the open membrane. Catching a split corner early keeps it a small patch.
They do. A pitch pan around a gas line or support near the unit leaks when its sealer shrinks below the rim. Refilling it with pourable sealer, adding a rain bonnet, or swapping the pan for a curb or boot closes it, and pans get checked during every curb repair.
Tell us which unit leaks and when. We will check the curb, the condensate line, and the flashing.
Want A Call Back About Your Roof?
Leave a name and number and we will call to talk through the leak or damage.
Or call now: (618) 386-6062