Roof Repair in San Antonio - Written Price, Workmanship Warranty

Fast, Reliable Roof Repair Across San Antonio

Roof repair in San Antonio usually means one thing: hail damage. Spring supercells roll through the Hill Country and hammer composition shingle roofs across Stone Oak, Alamo Heights, and Helotes, leaving granule loss, cracked shingles, and dented flashing behind. A typical shingle repair runs $350 – $800, while flat roof patches on the older homes near Monte Vista or King William District run $500 – $1,200 depending on membrane condition. If water is already coming through, call us at (254) 276-4369. Grant Whitlock and our crew respond fast, and we show up the right way: name and photo sent ahead, photo ID badge at the door, written price in hand before a single nail is driven.

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Why Mercer Roofing Co San Antonio Is San Antonio’s Preferred Roof Repair Company

San Antonio homeowners have seen the circus. After every major hail event, out-of-state crews flood neighborhoods like Cibolo and Bulverde, knock on doors, and offer “free inspections” that end with pressure tactics and contracts signed on an iPad. Mercer Roofing Co San Antonio does not play that game. We are part of the Threshold Group family, founded in 2000, and every location is independently owned and operated under the Threshold Verified standard. That means background-checked, identity-verified, uniformed technicians on every visit. Nobody who works on your roof is a stranger. You get a name and a photo before we arrive, and a photo ID badge at the door before we step inside.

What sets us apart in San Antonio is the written guarantee. Every repair, from a vent boot replacement in Schertz to a valley repair in Floresville, comes with our 365-Day Done Right Promise. If the work is not right within a year, we make it right, and a second visit is free. We also put every price in writing before work starts. No surprises on the invoice. No handshake math. Just a clear, line-item price for a specific repair, the way it should be.

Flat Roof Repair in San Antonio

Flat Roof Repair in San Antonio is a different animal than shingle work. The city’s older neighborhoods, especially inside Loop 410, include hundreds of homes with low-slope and flat roof sections built with modified bitumen, TPO, or old built-up roofing systems. San Antonio’s intense UV exposure and summer heat break down these membranes faster than northern climates do, causing cracks, blisters, and seam failures around scuppers and parapet walls. A flat roof patch in San Antonio typically costs $500 – $1,200, while larger membrane repairs can run $1,500 – $3,000 depending on substrate condition. If your flat roof is leaking near a parapet or around a plumbing stack, do not wait. Water sitting on a compromised membrane spreads under the decking quickly.

What a Flat Roof Patch Actually Involves

We cut back the damaged membrane to solid decking, then inspect the substrate for rot. If the plywood or OSB is soft, that section comes out and gets replaced before the new membrane goes down. Every patch is cleaned, primed, and sealed with compatible materials, not a generic caulk squeeze job. On older San Antonio flat roofs we often find previous patches done with the wrong membrane type, which fails again in under a year.

When San Antonio Homeowners Need Flat Roof Repair

After a strong storm, flat roofs collect water unless drains and scuppers are clear. The neighborhoods around Alamo Heights and Terrell Hills have mature trees, and leaf debris clogs drainage points quickly. If water ponds for more than 48 hours after rain, the membrane is absorbing stress it was not designed for. We also see leaks around rooftop AC curbs, which are common on San Antonio flat roof homes.

Shingle Roof Repair in San Antonio

Shingle Roof Repair in San Antonio is the bread and butter of our work, and for good reason. Most single-family homes built since the 1970s across the northside developments of Stone Oak, Timberwood Park, and Hollywood Park use asphalt composition shingles over plywood decking. San Antonio’s hot, humid summers accelerate granule loss, and then the spring hail storms finish the job with impact damage. A shingle repair in San Antonio typically runs $350 – $800 for a standard section, while full replacement on a damaged slope can run $1,200 – $3,000. The key is matching the existing shingle. We stock Owens Corning and IKO profiles, and our crews know how to blend a repair so it does not look like a patchwork quilt from the street.

What Shingle Roof Repair Involves

We remove the damaged shingles, check the underlayment and decking below, then install new shingles to the manufacturer’s nailing pattern. That nailing pattern is not optional decoration. It is the difference between a roof rated for 130 mph wind uplift and a roof that peels apart in the next supercell. We document every step with photos, which matters when you file an insurance claim after the next hailstorm.

Signs Your Shingles Are Failing in San Antonio

Look for granules in your gutters, especially after a rain. Thermal cycling in San Antonio summers causes shingles to become brittle and crack at the edges. Hail strikes leave circular impact marks, often with exposed fiberglass mat. If you see cracked, curled, or missing shingles, a targeted repair now prevents decking rot later.

Trusted Brands We Service in San Antonio

We install and repair shingle systems from Owens Corning, Atlas, and Tamko, three manufacturers with strong wind and hail ratings for Central Texas. That matters. San Antonio sits in a high-wind and hail-risk zone, and a roof rated for 110 mph will not hold up the way a 130 mph system will. We keep common profiles and colors for these brands stocked locally, which means faster turnaround when you need a section repaired and the manufacturer’s warranty intact. If your roof currently has a different brand and a section fails, we will tell you honestly whether a match is available or whether a full-slope replacement is the smarter long-term move. No upsell, just straight answers and a written price.

Common Roof Repair Problems We See in San Antonio Homes

• Hail-damaged ridge vents and drip edge. Strong spring storms in San Antonio often damage the ridge vent and drip edge before the shingles themselves show impact. This leaves openings for wind-driven rain, and the next storm pushes water under the ridge and into the soffit.
• Flashing failures around chimneys and skylights. Older San Antonio homes, particularly in the mid-century neighborhoods inside Loop 1604, have original flashing that has worn through after decades of thermal expansion and contraction. Leaks around the chimney are often the first visible sign.
• Valley leaks from improperly installed or missing ice and water shield. San Antonio’s heavy rain events concentrate water in roof valleys, and without a proper membrane layer, water penetrates at the shingle seams. We see this most in homes built before current code standards were adopted.
• Vent boot gaskets cracked by heat and sun. The rubber gaskets around plumbing vents degrade under San Antonio’s UV exposure, dry out, and crack. This is a small part with a big consequence: water follows the pipe straight into the attic insulation and ceiling below.

Pricing for Roof Repair in San Antonio, TX

We Also Serve Cities Near San Antonio

Our crews serve the city of San Antonio and the surrounding communities of Schertz, Cibolo, Bulverde, and Floresville. If you need Roof Repair anywhere in the greater San Antonio metro area, the same Threshold Verified standard applies. Same written pricing. Same badge at the door. Same 365-Day Done Right Promise on every single repair.

FAQs About Roof Repair in San Antonio