Commercial Roofing
A strip of storefronts or a single warehouse bay on a busy road tells the same story after a tropical wind event: the first damage is at the edge. A coping cap shifted a half inch, a gravel stop lifted at a corner, a rooftop unit cover left unlatched. The National Weather Service records damaging gusts and minor damage in Pharr during Hurricane Dolly, with gusts in the 50 to 70 mph range reported across populated Hidalgo County, and that is the kind of event that tests edges first.
On the Las Milpas Road corridor in Pharr, TX we start at the perimeter, because wind enters there, and then follow the water path inward to see how far it went.
Wind speeds up as it crosses a roof edge and creates suction that is strongest at corners and along the perimeter. A membrane held by a loose edge can peel back in a sheet, and the first sign is often a wrinkle or a lifted flap along the parapet. We walk the full perimeter, press on each coping cap, check every fastener line and look for gaps between lengths of metal.
Where edge metal has moved, we look under it. The membrane termination, the sealant bead and the substrate are all part of the securement, and a repair that only re-seats the cap leaves a weak attachment point behind. If the substrate is rotted or the fasteners have backed out, the fix includes new blocking or longer fasteners, documented with photographs of the repair before the cap goes back on. The scope for edge metal, coping and gutters follows that sequence. On a Pharr building with a long frontage, we divide the perimeter into numbered runs of the same length and report each run separately, so a loose run in the northwest corner is not lost inside a general note that the edge looks acceptable.
Units that sit on curbs with light attachment, exhaust fan hoods, condensate lines and conduit supports all respond to gusts differently. A unit can shift on its curb by an inch and tear the flashing around it without any visible change from the ground. We check the curb corners, the fastener pattern, the sealant at the cap and the support points for lines that cross the roof. We also look for evidence of earlier movement: bright rub marks on membrane, fresh sealant over old, shims under a curb. Those marks tell us a unit has moved before, and that a repair needs to stop the movement, not just seal around it.
Items that were already marginal are the likeliest to fail in a storm. Panels with missing latches, curbs with open corner seams and pipe boots hardened by sun all show up on the walk. After Dolly-type gusts, NWS guidance is to inspect roof edges, flashings and rooftop equipment, and our checklist covers all three with a curb and support review for each unit.
The metropolitan planning list includes a Las Milpas Road widening project from West Jackson Road to Cage Boulevard in Pharr, and the I-2/I-69C interchange project connects the east-west and north-south expressway systems there. Both are plans or ongoing work, and we confirm what is open on the day we schedule, then write the access constraints into the job notes. Lane shifts and construction traffic change where a truck can stop, how a crane can swing and when a delivery can arrive.
Nearby construction also puts dust and debris on membranes and into drains. Grit settles in sumps and strainers and fills a scupper before the next rain, and a clogged outlet turns a heavy shower into a ponding event, so we clear and photograph outlets before work starts and again at closeout, which gives the owner a clear before-and-after on the drain path. If a building sits close to a work zone, we add a drain check to every visit during the project.
Most commercial occupants cannot close for a roof, so we phase. The first phase is emergency work: emergency roof repair to secure loose metal and cover open areas. The second is a repair scope with a tight boundary around damaged edges, flashings and equipment. The third, if the survey finds moisture spread across a zone, is a comparison of phased restoration with replacement.
Each phase has a drawing and a photo list. Occupied bays get interior protection and a named contact on site, and the crew leaves each bay clean at the end of the shift. Work that creates noise or dust is scheduled around the business, and the log records the hours. Replacement, when the survey calls for it, is sequenced in sections that fit the building's drainage plane, so each finished section sheds water to an open drain before the next section is opened. A forecast with tropical moisture moves the schedule, and the roof is sealed up each evening whatever the day's progress.
We document the roof from the edge inward: perimeter metal, corners, terminations, penetrations, equipment and the field. Each image carries a location tag and date. Where we find damage, a second photo shows the same spot after repair. For storms that reach the level of hurricane damage, the record is arranged by roof zone so an insurer, lender or ownership group can find what they need.
Owners who also hold property in Mission or elsewhere in Hidalgo County can use the same record format for each building, which keeps comparisons simple and shows which building carries the largest open repair list. A wind-damage scope also links to the wind damage repair checklist we use on every roof.
Edges, flashings and rooftop equipment, in that order. Those are the places the Weather Service tells owners to look after tropical wind. We add drains, because wind-driven rain and debris often block them. Equipment covers, latches and conduit supports come after that, followed by the field of the membrane.
Not if it leaves an opening. A lifted edge or a torn flashing admits water on the next rain, and tropical readiness runs through the end of October. Securing the opening now keeps a repair from becoming a wet-insulation scope.
By whether the metal can return to a tight fit without cracking and whether the substrate holds a fastener. Bent, creased or corroded metal is replaced. Straight metal over sound substrate can be refastened and resealed, and each choice is photographed so the owner can see why one run was replaced while its neighbor was kept.
It changes access and debris. We plan hoisting around lane closures and check drains more often. The roof assembly itself is judged on the same evidence as any other.
Dated photographs by zone, the moisture findings, the repair list with locations and the closeout images. The record separates what was fixed from what was only observed, so the owner knows which items are still open. It also lists the next checks, such as a drain look after the next heavy rain.