Commercial Roofing
A discolored ring around a process vent is the roof showing what the plant has been breathing out for years, and the membrane under that ring is usually in worse shape than the sheet ten feet away. Edinburg, TX lists manufacturing and food processing among its employment sectors, along with logistics and warehousing, so plants with exhaust stacks, makeup air units, wet processes and large cooling loads are part of the building stock. Their roofs carry more than weather: they carry the plant's emissions, its heat and its service traffic.
We begin by looking from the leak backward, then from the vents outward, since a manufacturing roof can fail because of an opening in the sheet or because of what lands on it. A photo record tied to a roof drawing shows which problem we are dealing with.
Exhaust from ovens, fryers, wash lines, paint booths and process hoods leaves residue near the discharge point. Some residue is grease, some is mineral deposit and some is chemical vapor that stiffens or softens the membrane. Condensate lines and cooling tower drift add moisture and sometimes treatment chemicals. Each source leaves its own pattern, usually a plume downwind of the vent.
We map every discharge on a drawing, photograph the surface around it and compare the exposed area with clean membrane elsewhere on the roof. If the sheet beside a vent is as flexible as the sheet across the roof, the system is coping. If it has hardened, softened or discolored, we record the difference. The repair then has two parts: fix the damaged area and, where possible, change the source by raising a stack, adding containment or redirecting the discharge. KEE roofing and other chemical-resistant sheets are worth pricing for these zones.
A plant roof has more penetrations than a warehouse roof: stacks, ducts, pipe racks, platforms, conduit and curbs of every size. Each one is a cut in the membrane that depends on a flashing. Pipe supports that rest on the surface without pads wear through it, and ducts that were added later may sit on blocks that concentrate load.
When a leak shows inside, we trace it from the stain to the nearest penetration and check every detail within a wide radius. The most common entry is a flashing at a stack or a curb, followed by a seam beside it. Hot pipes and ducts cause local thermal movement that the flashing must absorb. A leak over production equipment is urgent, so we place temporary protection first and trace the entry second. Our penetration flashing repairs rebuild the detail with a new boot or curb flashing and test it.
The sequence starts with the drawing. We number each piece of equipment and each roof zone, then walk the roof in a fixed order and photograph each item from a distance and up close. The record has a page for each penetration and each support, with condition, nearby membrane condition and next step.
Where moisture is suspected, an infrared moisture survey maps the wet insulation. Moisture often collects around equipment clusters because the water paths are broken up by curbs and platforms, and a survey shows the extent before a repair is scoped. When the readings are back, we lay them over the equipment drawing, so the facility director sees which clusters are wet, which are dry and which repair can be done without touching the production schedule.
A plant roof takes the Valley's May-through-October heat-safety months on top of the heat rising from the building, and the temperature cycle between day and night works on seams, flashings and sealants. Expansion and contraction are largest at the details attached to equipment, which are also the details most likely to leak.
Tropical weather adds wind and rain. Hurricane Dolly's gusts crossed the county, while Hurricane Hanna's July 2020 visit meant wind and street flooding in Edinburg. After such an event we check rooftop equipment for movement, screens for damage and drains for debris. Spring 2012 hail in the metro area was unusual for the Valley, but a hail damage repair record would sort impact marks from other wear if it happens again.
A repair around a vent or curb extends as far as the damaged membrane does, plus a margin onto sound material for a secure bond. Where the plume has degraded a wide area, the boundary grows with it. If the insulation under that area is wet, the boundary extends to the wet edge.
Once a plant roof has little service life left, the question becomes whether to repair zone by zone or replace in phases. We price both. A phased replacement works well on plants that run around the clock, because one zone is torn off, rebuilt and dried in before the next. Equipment that must move during replacement is listed on a shutdown schedule, with each curb getting its own window. The cost drivers are layers, wet insulation, equipment count and access, and they are laid out beside the findings.
A plant has hazards that a warehouse does not: hot surfaces, chemical storage, confined spaces, food-safety rules and restricted zones. We ask the facility director for site safety rules, permit requirements and the hours when noise or debris is acceptable. For food processing, we ask about contamination controls, since debris, dust or fumes entering the building could affect product.
We cover air intakes, protect open skylights and set debris control under the work area. Where a process line runs three shifts, we ask which hours carry the fewest people near the work and schedule loud steps and lifts then, so a crane pick never lands over a loading path or a break area. A section opens only if it can be dried in before the crew leaves, and tarps stay on site for sudden rain. Because the storm season in the Valley runs from June through October, forecasts are checked every morning. Owners with plants in Edinburg or the Mission area can use the same record at each site. Related building types, such as cold storage roofing and warehouse roofing, follow the same sequence.
Yes, in zones. We schedule shutdowns for equipment that must be lifted, protect intakes and close each section the same day.
Grease, vapor or minerals from the discharge land there. We compare it with clean membrane to see how much the exposure has changed it.
Nearly always. A bare support concentrates load and wears through the membrane as the pipe moves with heat.
We check equipment movement, screens, edges and drains, then inspect flashings. Wind-driven water enters at those spots before any hole appears.
The city reviews the permit against its 2018 adopted codes, and a plant's own fire-safety and hot-work rules sit on top of that review.