The powerful windstorm that moved through San Antonio on August 28 left downed trees, damaged power lines and scattered structural damage across Bexar County. According to the National Weather Service, measured winds reached 55 to 65 mph, with pockets of 70 to 80 mph likely along a damage path stretching approximately 35 miles.
Those winds were produced by a macroburst rather than a tornado, but that does not make the potential roof damage less serious. The National Weather Service explains that straight-line winds reaching 70 to 80 mph can damage roofs, siding and other exterior components.
Even if your home appears unharmed from the street, wind can loosen roofing materials without leaving an obvious opening. Knowing what to check—and when to request a professional inspection—can help prevent minor storm damage from turning into a costly roof leak.
How Straight-Line Winds Damage a Roof
Straight-line winds generally move outward in one direction instead of rotating like tornado winds. They can still place significant pressure on roof edges, corners, ridges and overhangs.
As wind moves across a roof, it can lift shingles and weaken the adhesive seals holding them in place. A shingle may settle back down after the storm while remaining creased, torn or partially detached. That damage might not be noticeable from the ground, but the shingle may no longer provide dependable protection against rain.
Wind can also loosen ridge caps, flashing, vents and other roof components. Falling branches may crack shingles, puncture the roof surface or damage the decking underneath. These conditions are among the reasons homeowners should consider an inspection after unusually strong winds, even when the roof is not actively leaking.
Warning Signs You Can Check From the Ground
Do not climb onto your roof following a storm. Wet surfaces, loose materials, unstable tree limbs and nearby power lines can create serious hazards. Instead, walk around the property from a safe distance and look for:
- Missing, lifted or uneven shingles
- Shingle pieces or roofing nails on the ground
- Bent or missing flashing
- Damaged ridge caps or roof vents
- Tree branches resting on the roof
- Dented, separated or sagging gutters
- Loose soffit or fascia materials
- New debris collecting in downspouts
- Changes in the roofline or visibly sagging areas
Compare every side of the roof when possible. Wind damage may be concentrated on the slope that received the strongest gusts rather than spread evenly across the entire structure.
Invision’s guide on what to do after wind or storm damage provides additional steps homeowners can take without putting themselves at risk.
Check Inside Your Home Too
Exterior damage is not always visible. Check the attic, ceilings and upper walls for new water stains, damp insulation, musty odors or sunlight entering through an opening.
Pay particular attention to areas around chimneys, vents, skylights and roof valleys. These transitions can become vulnerable when flashing or sealants are disturbed.
A leak may not appear during the original storm. Water sometimes enters through a small opening and travels along the roof deck, rafters or insulation before reaching a visible ceiling. Invision explains why San Antonio roof leaks can appear weeks after summer storms.
Why an Inspection Matters When Nothing Looks Wrong
A professional inspection can identify creased shingles, broken seals, displaced flashing, punctures and soft decking that homeowners cannot safely see from the ground.
Finding damage early may allow a focused San Antonio roof repair before another heavy rain exposes the problem. Waiting until water reaches the living space can result in damaged insulation, drywall, paint and roof decking.
An inspection is especially worthwhile if:
- Nearby homes lost shingles or sustained tree damage
- Your property was within the storm’s strongest wind corridor
- You found roofing debris in the yard
- Your roof is older or has previous repairs
- A large limb struck or scraped the roof
- You notice any new interior moisture
Document Possible Storm Damage
Photograph visible damage before debris is removed or temporary work begins. Capture wide views of the home, closer images of damaged areas and pictures of interior water stains.
Write down when the storm occurred and when each problem was first noticed. Save estimates, inspection findings and receipts related to temporary protection.
The Texas Department of Insurance recommends taking photographs or video, making only necessary temporary repairs and keeping receipts. It also advises homeowners against completing permanent repairs before the insurance company has had an opportunity to inspect covered damage.
Coverage and deductibles vary, so review your policy and speak directly with your insurer before assuming that a repair or replacement will be covered. Invision’s guide to San Antonio roof insurance coverage in 2026 explains several important questions to ask.
Schedule a San Antonio Roof Inspection
A roof does not need to be missing a large section to have meaningful wind damage. Lifted shingles, weakened seals and loosened flashing can remain hidden until the next storm brings rain into the roofing system.
Invision Roofing has served San Antonio and surrounding communities since 2004. If your home was affected by the August windstorm, contact Invision Roofing to have the roof evaluated and receive clear recommendations about any necessary repairs.
