Commercial Roofing
Hail damage on a flat commercial roof rarely looks like much from the parking lot. A bruised membrane, a fractured layer of insulation under it and a dented rooftop unit can all sit under a surface that still sheds water on a dry day. The National Weather Service documented large hail crossing the McAllen-Edinburg-Mission-Pharr metro in spring 2012 and calls such hail non-routine for the Valley, which means many owners along the US 83 corridor in McAllen, TX have no recent baseline for what an impact looks like on their roof.
We start by looking for the evidence a storm leaves behind and by tracing any water path it opened. Then we decide whether the fix is a patch, a section repair or something larger.
Both leave pits and cracks, and they get confused. Heat and sun age a membrane evenly across a slope, hardening it and opening small cracks along seams and around fasteners. Hail leaves isolated, round impacts scattered by exposure, often heavier on one side of the building and on raised surfaces like rooftop equipment covers, vent caps and skylight domes.
We photograph the whole roof zone first, then close, and mark every candidate impact on the plan. A bruise in a single-ply membrane may show as a soft, slightly depressed circle, and the test is to press on it and read the moisture underneath. Old wear carries dirt and oxidation inside the mark, while a fresh fracture is clean at the edge. When the evidence is mixed, the item goes in the record as undetermined and gets a test, not a guess.
Metal surfaces tell their own story. Standing seam panels and metal curbs show dents that may be cosmetic or may have creased a seam, and the difference is whether water can now reach the fastener line. We run a hand along each panel rib, photograph the dents with a scale and note which ones sit over a lap or a clip. A dent that crosses a seam goes into the repair list. A dent in a flat panel with intact coating stays on the watch list.
The metropolitan planning list includes improvements on Jackson Avenue and South 23rd Street in McAllen, described as local links into the commercial road grid. Roads under construction change how a truck reaches a loading dock, where a crane can set up and what hours a lane can be closed, so those details belong in the roof schedule from the first estimate. A project on that list is a plan, and we confirm current conditions at each site before dates are set.
On an occupied building such as a big-box retail roof, deliveries and customer traffic share the same entrances our crews need. We stage material on the roof in daily quantities, keep dumpsters away from fire lanes and time hoisting for hours when the lot is quiet. The photo record shows where equipment sat each day. If a lane closure delays a delivery, the log shows what stayed covered while the truck waited, so no roof zone sits open overnight because a schedule slipped.
Hail can fracture rigid insulation without puncturing the membrane, and the damage then spreads quietly. Each rain pushes a little water through the micro-cracks, and the board loses strength and thermal value. An infrared moisture survey flags suspect areas, and a core cut confirms them at marked points.
If moisture is limited to a few impacts, the repair boundary stays tight: remove the damaged board, replace it and patch the membrane with proper laps. If the survey shows wet insulation over a wide area, we price phased restoration next to replacement. A cover board placed between insulation and membrane in the new assembly is one way to harden a roof against the next impact, and we show the owner what it adds in cost and in protection. The same assembly review covers drainage: if a hail-damaged section also holds water at a low spot, tapered board can be priced into the same scope, since the roof is open anyway.
From May into October the Valley is in heat-safety season, months of sustained surface heat and sun. A hail-bruised membrane that is left unrepaired goes through that stretch with every cracked spot expanding and contracting daily. A hairline fracture in May can be an open split by September.
For that reason we set the repair order by risk. Open penetrations and torn membrane get a temporary dry-in first, then permanent repairs follow on a schedule that avoids the hottest part of the afternoon, when adhesives and sealants are hard to work. Where a section needs a full hail damage repair, we describe the sequence by zone so the work does not stall the whole building. Crews start early, break during the worst afternoon heat and finish the day with every opened area closed.
The product is a photo record organized by roof zone: wide shots, close shots, the moisture map, core-cut images and a list of repair items with locations. For an owner who needs to discuss a loss, our claim documentation support assembles the same evidence and stays out of coverage questions. It carries the date of each observation, so a later reader can tell what was found immediately after the storm and what came later. Core cuts are patched the same day and located on the plan, so nobody mistakes a repaired test cut for a new defect on the next walk.
Owners with several buildings can keep the same format across McAllen and the US 281 and I-69C corridor in Edinburg, which makes a portfolio comparison straightforward.
The sooner the better, because fresh impacts are easy to identify and water that has already entered is easier to trace. If the building has interior stains, check them against the roof the same day. A roof that looks fine from the ground can still hold fractured insulation, so the walk includes a moisture scan.
No conclusion follows from the weather alone. The Weather Service describes large hail as unusual for the Valley, and a single storm can still pass over some roofs and miss others. Each roof has to be read on its own evidence, and a building that came through untouched still gets a baseline photo record that makes the next storm easier to judge.
The moisture reading and the count of impacts. A few bruises over dry insulation can be patched and logged. Many impacts across a zone, or wet insulation under them, push the scope toward section replacement.
Usually, with phasing. We open one roof zone at a time, dry it in before closing the day and coordinate delivery and hoisting around customer traffic. Interior protection goes in below the active zone first, and tenants get a notice naming the zone, the day and the hours of noise.
They can. Lane closures and construction traffic change truck routes and crane setups, so we confirm current access at the site and build the schedule around it. Any changes are recorded in the daily log.