TPO Roof Repair After Storm Damage in San Antonio: What Homeowners & Property Managers Should Know
TL;DR
Storm damage on TPO hides: hail fractures the membrane while insulation saturates invisibly underneath, and wind lifts seams starting at edges and corners. Isolated repairs run $600 to $3,000, but wet insulation pushes costs to $18 to $35 per square foot, so a moisture scan in week one is the difference between hundreds and five figures. Replacement beats repair once damage or wet insulation passes 25% of the roof. Document everything for the insurance claim, starting the day of the storm.
TPO handles our heat well, which is why it covers so many commercial and multifamily buildings here. What it doesn’t shrug off is what storms throw at it: hail bruises, debris punctures, seam uplift, and drains packed with wind-blown debris. The damage rarely announces itself from the ground, and on a flat roof, water that can’t drain finds every weakness within days. Here’s how to assess a TPO roof after a storm, what repairs cost, and when repair stops being the right answer.
What does storm damage look like on a TPO roof?
Four patterns cover most of it. Hail leaves bruises and fractures in the membrane, often invisible until a moisture scan finds the wet insulation underneath. Wind works on the perimeter and corners first, tugging at seams and flashings until they lift. Debris punctures show up around rooftop equipment where branches and gravel land. And clogged drains turn the whole roof into a pond, adding structural load and finding every marginal seam.
The dangerous version is the one you can’t see. A hail-fractured membrane can hold surface water out for months while insulation saturates underneath, and by the time a stain reaches a ceiling tile, the wet area is many times the size of the original strike. That’s why post-storm assessment on TPO means a commercial inspection with moisture scanning, not a walk-by from the parking lot.
What should property managers do right after a storm?
Same triage as any roof, adapted to flat systems. Note the storm date, photograph the roof from access points and the ground, and check interior ceilings under roof drains and equipment. If water is entering, get same-day dry-in; emergency measures are typically reimbursable under commercial policies, so keep the documentation. Then get the moisture scan within the week, while damage still dates cleanly to the storm.
Two flat-roof specifics: clear the drains first, because ponding multiplies every other problem, and check the perimeter details, since wind damage on TPO starts at edges and corners rather than the field. Our crews photograph everything during storm damage response so the insurance file builds itself from hour one.
How much does TPO storm repair cost?
Isolated punctures and seam rewelds run $600 to $3,000, with membrane repairs generally pricing at $3 to $14 per square foot of affected area. The number that moves budgets is wet insulation: once storm water saturates the layers under the membrane, repairs jump to $18 to $35 per square foot because material below the surface has to come out.
| TPO storm repair | Typical cost |
|---|---|
| Puncture patch or seam reweld, isolated | $600 to $3,000 |
| Membrane repair, per sq ft of affected area | $3 to $14 |
| Repair with wet insulation replacement | $18 to $35 per sq ft |
| Emergency tarping/dry-in premium | add 25 to 50% |
| Restoration coating (membrane sound, insulation dry) | $1.50 to $5.50 per sq ft |
| Full TPO replacement | $8 to $15+ per sq ft |
That wet-insulation multiplier is the argument for speed. The same hail strike costs a few hundred dollars as a fresh patch or five figures as a saturated section, and the only difference is how long the water had. A moisture scan in week one keeps the repair in the first column.
When is repair the wrong call for a storm-damaged TPO roof?
The 25% rule applies: when more than a quarter of the roof is damaged or moisture scanning shows over 25% of the insulation is wet, repeated patching costs more than reroofing. Membrane age tips borderline cases, since a storm-damaged TPO roof at year 18 of a 15-to-25-year life rarely justifies major repair spend. There’s also a middle path when the membrane is aging but the insulation stayed dry: a restoration coating at $1.50 to $5.50 per square foot buys 10 to 15 years for a fraction of replacement.
If the storm did total it, the claim process runs on documentation: dated photos, the moisture scan mapping wet areas, and your contractor at the adjuster walk. We handle that end to end through our insurance claim concierge, including scope-matching so the settlement reflects what the storm actually did to the system, insulation included.
How do you make a TPO roof more storm-resistant?
Maintenance is the storm prep. Twice-yearly inspections catch the marginal seams and aging flashings that wind exploits, drain cleaning prevents the ponding that turns rain events into load events, and documented condition records make every future claim cleaner. A commercial maintenance program covers all three and protects the manufacturer warranty while it’s at it.
Membranes with existing problems fail first in storms. If your TPO already shows bubbles or blisters, those are pre-weakened points a storm will find, and fixing them on schedule beats fixing them at emergency rates.
Get the moisture scan before the water spreads
Storm damage on TPO is a race between assessment and saturation. The buildings that come out cheap are the ones scanned in week one, and the expensive ones waited for the ceiling tile.
BH Roofing is a certified commercial TPO installer serving greater San Antonio, with 12-hour emergency response, moisture scanning, and claim coordination. Schedule your free commercial inspection or call (210) 267-9029.
