A leak next to a rooftop unit at Ventura Auto Center can hit both the roof and the service bay or showroom below it. We inspect the curb, the membrane and the seams nearby before deciding whether a local repair will do. The Auto Center is a group of dealerships on about 55 acres south of U.S. 101, but each property has its own roof, entrances and vehicle routes. We confirm those before opening the roof.
Service bays, showrooms and neighboring industrial buildings each need different staging and protection. We work out the lift position, customer walkways and material drop with the building contact, then explain how the opening will be dried in and permanently closed. The scope follows the curb we inspected and the work going on underneath it.
The roof and the equipment at the same curb
A rooftop unit sits on a curb, and the roof membrane is flashed up the sides of that curb. Leaks can come from the flashing, from the curb itself or from the unit: a cracked drain pan, a loose panel or a leaking duct connection. On dealership roofs with large units over service bays, condensate lines are another common source.
Our rooftop equipment curb and support work covers the roofing side. If the unit is the source, we tell the HVAC contractor where to look. The estimate shows which repair belongs to which trade, so the dealership is not paying the wrong contractor.
We also look at how often technicians walk to the units. Heavy foot traffic, dropped tools and panels set down on the membrane all wear out the roof around equipment. Walkway pads from the hatch to each unit are an inexpensive way to protect the repair and the rest of the roof.
How far the repair goes around the curb
Water that gets in at a curb soaks the insulation around it, often farther than the visible gap suggests. When we cut back the old flashing, we probe the area and cut a small core to see how far the wet insulation reaches. That is why a curb repair sometimes means removing more roofing than the size of the tear.
Confirmed wet material is replaced with new insulation and cover board at the right thickness, so the new flashing sits on a solid, level base.
We check the curb framing and the deck at its base too. Rotted wood or rusted metal is photographed and priced before it is replaced, and you approve it first. The opening is dried in each night so the bay below stays dry and vehicles are protected.
Moving material between rooftop units
Dealership roofs often have several large units, ducts and conduit runs close together. We plan how materials will move between them without damaging the membrane, using walk boards where needed and keeping clear of electrical lines.
On the ground, finished vehicles and customer areas need protection from dust, falling debris and crane swing. We set up the lift or crane away from inventory where possible and schedule heavy lifts outside peak sales hours. Industrial buildings near Montalvo get similar planning.
Service bays below may have lifts, compressors and customer cars in progress. We ask the service manager which bays can be cleared during the work and hang protection inside if a bay has to stay in use.
Related Roofing Work
Corners and the top of the curb flashing
Curb corners are where most curb flashing fails. On a KEE roof, we use pre-formed KEE corners welded to the curb flashing and the field membrane, with the top of the flashing fastened under a counterflashing or termination bar so water cannot get behind it.
The flashing has to run high enough up the curb to stay above standing water. If the curb is too short, we work with the HVAC contractor to raise it. Every weld is probed before the unit goes back into normal service.
If the unit has to be lifted to finish the flashing under its rails, we schedule that with the HVAC contractor so it is down for as little time as possible.
Records, other curbs and urgent repairs
As the curb is rebuilt, we photograph the framing, the new insulation and the flashing before they are covered. The finished flashing is checked, and any equipment work by the HVAC contractor is listed separately. The owner gets a record of the roof repair, not just a clean surface that might hide an unfinished equipment problem. On the ground, the scope notes where the work zone meets service-bay equipment, how penetrations are flashed and what must stay running during each phase. Each dealership's repair quantities are kept separate, rather than treating the area as one continuous roof.
A roof condition report separates the finished repair from later decisions. Other curbs with similar problems may be worth checking, but they are not automatically added to the job.
If a curb is leaking into a service bay or showroom at night, on a weekend or over a holiday, we can make it watertight. That emergency fix is recorded separately from the permanent flashing and any equipment work still needed.
Industrial and commercial roofs in Montalvo and along the Johnson Drive corridor have plenty of rooftop equipment too. We inspect curb corners, membrane terminations and the service path around each unit, then plan a safe material route with the property contact before touching the roof.
Common Questions
How is a curb leak split between the roofer and the HVAC contractor?
The roofer handles the membrane flashing, the curb framing and the insulation around it. The HVAC contractor handles the unit, its drain pan, condensate line and duct connections. The estimate lists each so the dealership knows who is fixing what.
Does new flashing mean the curb itself is sound?
No. Flashing only seals the curb to the roof. If the curb framing is rotted or the metal is rusted, it has to be repaired first, or the new flashing will fail. We check the curb before we flash it.
Why might a curb repair need more roof removed than the visible gap?
Because water spreads through the insulation around the curb. A small tear can leave a much larger wet area underneath. We confirm the wet area with a core and replace only what is actually damaged.
What needs to be agreed before material reaches the equipment area?
Where the lift or crane goes, how vehicles and customers are kept clear, the path across the roof between units and when heavy lifts can happen. We set that with the dealership and the HVAC contractor before the job starts.
What record shows the roofing is finished even if equipment work is pending?
The closeout lists the roofing repairs with photos and materials, and separately lists any equipment work still waiting on the HVAC contractor. That makes it clear the roof is done and what is left for the other trade.
Walk the dealership roof with us
Send us the roof area, the equipment problem and who handles access at the dealership. We will inspect the curb and roof, plan around your operations and explain the repair.