Commercial Roofing
A strip-center roof that has just come through a tropical gust often looks fine from the parking lot, and then a dark ring appears on a ceiling tile two storefronts away. In Edinburg, TX, I start that kind of call at the perimeter, because lifted edge metal and a rippled membrane near a parapet usually explain the interior stain. From the stain I work backward along the water path to the first detail that moved. The question for the facility director is whether that detail is a single repair or the first sign of a roof that has loosened more broadly.
The National Weather Service recorded 50-to-70-mph gusts and minor damage across populated Hidalgo County during Hurricane Dolly, including Edinburg, Pharr and McAllen, and its guidance after tropical wind is to inspect roof edges, flashings and rooftop equipment. That is the order I follow.
Wind rarely damages a roof evenly. It finds the edge first, then the corners, then anything that stands up from the surface: a curb, a vent stack, a satellite mount. I look for bent coping, gaps at metal joints, a membrane that has stretched toward a corner and fasteners that have backed out of their plates. A lifted section may have dropped back flat and left only a hairline crack at the termination, which is why a casual look from the hatch misses it.
I also look for the debris trail. A scarred patch of membrane tells me where something hit and which way the wind was moving, and that points to the details downwind that took the same load.
Rooftop signs, antennas and conduit supports deserve the same look. A single bolt that has worked loose can let a bracket rock in the wind and wear a hole in the sheet beneath it over several storms, so I note every fixture that moves when I push on it and list it for repair even when nothing is leaking yet.
Rain driven under a loosened edge does not stay near the opening. It runs along the top of the insulation or down a deck flute and can surface in a bay on the other side of the building. To find the real entry, I compare the interior report with the roof plan, mark the stained rooms and walk the matching roof area slowly. An infrared moisture survey shows how far the wet area reaches, and a few dry test areas set the edge of the repair.
That map separates a local repair from a larger problem. If the wet area is small and bounded, the work stays tight. If the readings spread, the scope grows with them.
An edge holds because of what lies behind it: the fastener spacing, the substrate and the way the metal is secured to the wall or the deck. When I find a section that has pulled away, I check whether the problem is the metal alone or the attachment under it. Corroded fasteners, soft wood nailers and sealant that has aged out are common causes. Replacing a bent coping cap without fixing the attachment simply hands the next gust the same weak point. The work on edge metal, coping and gutters starts with that check.
On a single-ply roof, I also look at whether the membrane is still bonded or fastened where it ends. A sheet that has lost its grip at the perimeter needs a termination rebuilt before it needs a patch.
A repair should extend to sound material and a secure termination, not only to the visible damage. For a wind event, that can mean a full length of coping, a replaced section of flashing return or a re-fastened strip of membrane along an edge. I photograph the layers before cutting, note any electrical or gas lines near the work and record where the dry material begins. If the substrate under the lifted area is dry and stable, a focused repair restores continuity. If it is wet, we stop and show the expanded condition before going further.
The written scope names what is temporary and what is permanent, so the facility director knows which areas are protected and which are finished.
Temporary protection comes first when water is entering. A tarp strapped to a stable fixture, a sealed patch over an opened seam or a plywood cover over a broken vent buys time without hiding the damage, and the photo record marks its position, so the permanent crew can lift it and look at the surface beneath.
Units that stand above the roof take wind load too, and the roof around them takes the movement. A condenser that shifted on its curb can crush the flashing beneath it, and a loosened vent cap lets rain straight into the building. I check each equipment curb and support for movement, then probe the flashing at its base. Tropical systems affect the Valley in the same months that its heat-safety season runs, from May through October, so a repair that goes in during heat also has to expand and contract with the sheet without opening again.
Most of the buildings I see after a wind event are occupied. The work is planned around operating hours, customer routes, loading movement and any air intakes near the roof. We mark the work area, secure temporary tie-ins before the shift ends and keep the open area as small as the weather allows. Where damage runs across several roof sections, the plan sequences them so the least protected area is closed first. A related set of conditions follows a larger storm and is handled under hurricane damage repair, where the scope often extends to drainage and the building's older flashing details.
Owners in Pharr and McAllen who share a portfolio with an Edinburg building can use one photo record format across all three.
The same day if the building is accessible and the roof is dry enough to walk safely. A loose edge or an opened termination can take in rain before the next afternoon, so a quick perimeter walk and a photograph of each concern comes first, and the detailed survey follows.
Sometimes, if the metal has not creased and the fasteners and sealant behind it are sound. The deciding factor is the attachment, not the cap. If the substrate is soft or the fasteners are corroded, a new run with a proper cleat is the repair that lasts.
It exposes the weak points in the order of their weakness. A membrane with brittle seams or tired sealant fails at those spots first. After a storm, the photo record shows which damage is new and which was already in progress.
They can be arranged so they do not. I ask for operating hours and loading times, then mark the work area and keep it small. Roof work on one side of a building often proceeds while the other side operates.
Photographs of any interior water, of equipment that stopped working and of debris on the roof if it can be seen safely from the ground. The date and approximate time of the wind event help me focus the first walk.