Commercial Roofing
Scorched insulation announces itself before anything shows: a sharp, sour smell where a kitchen exhaust or rooftop unit ran hot, and a membrane gone glassy and wrinkled in a ring around the opening. After a fire in an Edinburg, TX restaurant, shop or storage building, the first roof condition I check is not the char at the hole but how far the heat traveled under the sheet. Smoke and the water from the fire response do their own damage, and the three rarely stop at the same line. The question for the facility director is what the roof can safely carry once the building is dried out and reoccupied.
I trace the damage outward from the burn until I reach material that is sound, dry and still bonded to the deck.
Heat damages a roof in layers. The top of a single-ply sheet blisters, shrinks or melts back from the source, and the dark ring it leaves is the part anyone can see. Below it, foam or fiberboard insulation may have charred, slumped or fused to the deck, and a built-up or modified bitumen roof can hold smoldering asphalt between plies for hours. I press on the surface with a probe and a boot sole, because a spongy or crisp feel under a membrane that still looks continuous marks material that will not hold fasteners or adhesive again.
Smoke does a separate kind of harm. Soot film on a white membrane changes how it absorbs heat, and residue from burned contents can pit the finish on metal flashing. I photograph those areas apart from the structural damage.
Before anyone puts a boot on a fire-damaged roof, the structural question comes first. If the fire reached the deck or the framing beneath it, a safe walking route has to be confirmed by whoever is responsible for the structure, and no crew goes onto a section that has not been cleared. Once access is allowed, I start at the edge farthest from the burn and work toward it, taking photographs at fixed intervals so the gradient of damage is on record.
When a section is unsafe to cross, a drone roof inspection gives me close images of the perimeter, the penetrations and the burn margin without anyone stepping on it. From those images I mark where the sheet is intact, where it is cooked and where I cannot yet tell. The last category gets a probe or a core sample once the building is released for entry.
A fire response puts a great deal of water into a building from above and inside, and it does not behave like rain. It follows the burned openings down, but it also soaks the insulation around them, runs along deck laps and sits at drains that may be packed with debris. The ceiling beneath the burn is the obvious wet area, while saturated insulation twenty feet away rarely announces itself.
I look from the wet ceiling backward, then run an infrared moisture survey across the surrounding roof once it is dry enough to read. The scan is taken in the evening, when the roof gives up its stored heat and wet insulation shows as a warmer patch, and a few cores confirm what the scan suggests. In an Edinburg summer, with heat-safety guidance in force from May into October, the sun dries the surface quickly but can leave moisture sealed beneath a dark sheet, so the readings matter even when the top looks dry.
A steel deck that took intense heat can warp, lose its coating and lose fastener holding power without ever collapsing. A wood deck can char below a surface that looks only discolored. I check for sag between supports and for fasteners that pull out with little effort. The deck is the one part of the assembly that nothing on top can correct, so if it is in doubt the structural reviewer decides before a new layer goes down.
Where the deck is sound, I look at the air path above it. Burned openings, cut penetrations and broken seals leave gaps, and new insulation laid over unsealed gaps takes in moisture from the building below.
The repair edge should land on material that is dry, firm and well attached, and that is always beyond the visible char. On a single-ply roof, it usually means removing the cooked sheet and the damaged insulation, then tying a new section into the old membrane with a welded seam or a flashed termination. On a bituminous roof, it can mean cutting back through the plies until I reach layers that still bond. I write the cut line into the scope with a photograph of the dry test area on the far side, so everyone can see where sound roof begins.
Smoke-stained but intact membrane is a separate decision. Cleaning may be enough, or a roof coating restoration may suit a surface that is otherwise healthy. Scorched equipment supports go on their own line, because they usually need new parts.
Rebuilding a burned section is more than a patch, and the city enforces its adopted 2018 building and energy conservation codes. The permit office and the insurer will both want to see what the replacement section is made of, and the energy code can bear on its insulation. I raise that during the first walk, because insulation thickness and the fire rating of the assembly change material cost.
Buildings along Closner Boulevard and University Drive in Downtown Edinburg and buildings near the I-69C/US 281 corridor answer to the same adopted code, but the roofs behind them differ in age and layering, so each gets its own written scope.
Often it can, once the structure is cleared and the burned section is isolated. The plan separates the work zone from the operating areas with a protected path, keeps debris off occupied sides and seals the open edge at the end of each shift.
The first board-up or tarp goes on through emergency roof repair, and the photo record that begins on that visit feeds the insurance claim documentation. Fire often leaves seams opened and sheets punctured by falling debris, which is the work of membrane puncture repair, while a surface already worn by sun may need heat and UV damage repair beside it.
As soon as the structure is cleared for access and the opening can be reached safely. Emergency response runs through nights, weekends and holidays, and the first goal is a temporary cover over exposed insulation so the next rain does not add water damage to fire damage.
Not automatically. Whether the sheet is still flexible, bonded and watertight under the stain decides it. A cleaned and tested surface can stay, while a membrane that cracks when flexed or has lost its seam strength cannot.
The moisture map and the deck condition. If the heat damage and wet insulation sit inside a bounded area with sound roof around it, a section tied into the old membrane is reasonable. If the readings keep spreading past every cut line, the larger area comes into the plan.
The owner, the adjuster and any structural reviewer. Each photograph is labeled by roof area and condition, with the burn edge, the moisture readings and the dry test areas shown separately, so no one has to guess which damage is from the fire and which was there before.
It does. Adhesives and welded seams behave differently on a surface heated by a Valley summer, so during the May through October heat season I start early in the day and close the open area before the afternoon sun is at full strength.