Metal roofing
Architectural shingles
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Repair Across Alamo Heights
A roof repair in Alamo Heights typically runs between $425 and $1,850 depending on what’s failing, and most of our callbacks here come down to three things: oak-loaded valleys, aging decking on 1920s and 1930s homes, and patio-cover tie-ins that were never flashed correctly. We’re Roof Repair specialists who work these streets every week, from Arcadia Place to the newer sections near Broadway. If you have water coming in or granules washing into the gutter, call (254) 276-4369 and we’ll send a technician whose name and photo you’ll have before he knocks.
Alamo Heights isn’t like the open lots south of town. Mature live oaks canopy these streets, and that shade is beautiful for two months of the year and rough on roofs the other ten. Our crews know the difference because we see it firsthand, and we price it honestly before any work starts.
Why Mercer Roofing Co San Antonio Is Alamo Heights’s Preferred Roof Repair Company
Homeowners in Alamo Heights tend to ask sharper questions than most, and we’ve built our local reputation on answering them directly. What does it cost? Written down, before we touch anything. Who’s coming to my door? A background-checked technician in a marked uniform, photo ID badge visible, whose name and photo were sent to your phone before arrival. That’s the Threshold Verified standard, and every Mercer technician operates under it, contractually, on every single visit.
We’re part of the Threshold Group family of home-service companies, founded in 2000, and our San Antonio crew dispatches to Alamo Heights daily. That means a live person answers the phone at (254) 276-4369 any hour you call, and the person who shows up is someone we can vouch for by name. For homeowners who don’t love the idea of opening the door to a stranger, that specific detail matters more than any slogan.
Our Roof Repair in Alamo Heights work carries a 365-Day Done Right Promise on every repair, in writing. If the fix isn’t right within a year, we come back and make it right. That’s not a handshake, it’s on paper, included with every job at no extra charge.
Styles & brands we work with
Flat Roof Repair in Alamo Heights
Flat Roof Repair in Alamo Heights is rarely about the flat section itself. On these older homes, flat patio covers and carport roofs are tied into the main roof valleys, and that seam is where water gets in. The flat membrane might be fine. The junction isn’t. We repair both: the metal flashing at the valley, and the flat roof surface itself when it’s split or pulled away at the edges. Most flat roof patches in Alamo Heights run $500 – $1,400 depending on how much of the seam has separated and whether the decking underneath has rotted.
Valley-to-Patio Cover Junctions
On homes in the older sections of Alamo Heights, roof valleys drain directly onto flat patio covers. That junction takes a beating during heavy spring rains, and a shingle-only repair won’t touch it. We reinforce those seams with custom-bent metal, seal the transition, and test it before we call the job done. If you see water staining on the patio ceiling after storms, that’s usually the culprit.
Membrane Repair and Recoating
Flat roofs here age faster than the shingle sections because they hold water longer and bake in direct sun. We patch splits with compatible membrane, reseal penetrations around vent pipes and drains, and recoat when the surface is still sound underneath. A targeted flat roof patch on a typical Alamo Heights patio cover runs $475 – $900; a full recoat of a larger roof section runs $1,200 – $2,400 depending on square footage and membrane condition.
Shingle Roof Repair in Alamo Heights
Shingle Roof Repair in Alamo Heights usually starts with what you can’t see from the ground. The homes here are predominantly 1920s through 1950s cottages and ranch styles, and many still have original decking boards spaced for the old wood shake, not for modern asphalt shingles. When we pull the first course of shingles on those roofs, we sometimes find the decking is too gapped or too thin for a code-compliant repair. That’s not a upsell; that’s the reality of working on pre-war framing, and it’s why our written price includes exactly what we’ll do, and exactly what we won’t do without talking to you first.
Decking Correction and Replacement
When decking needs to be replaced or supplemented, the repair changes from a shingle peel to a structural correction. We pull only the affected area, re-deck with plywood to modern spacing, and then lay the shingles with a proper starter strip and drip edge. A shingle replacement with decking correction in Alamo Heights typically runs $850 – $1,850. Without decking work, a standard repair runs $425 – $800.
Granule Loss and Shingle Slippage
Alamo Heights summers cook shingle surfaces, and hail storms finish what the heat started. You’ll see granules in the gutter, bald patches on the shingle, or shingles that have shifted an inch down the slope. Those are fixable. We replace damaged shingles, match the existing color as closely as the manufacturer allows, and check the underlayment beneath for cracks or tears from thermal movement. That last part is what most repair crews skip, and it’s where the next leak starts.
Trusted Brands We Service in Alamo Heights
We install and repair shingle roofs using manufacturer-recognized brands including GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral, and we also handle Roof Installation - Alamo Heights projects from start to finish. For Alamo Heights homes, we most often work with GAF architectural shingles for their resistance to the hail we get in spring, and Boral or CertainTeed when a homeowner wants a specific profile on an older ranch or cottage. Because our San Antonio warehouse stocks common GAF and CertainTeed components locally, we can usually start a repair in Alamo Heights without waiting on a special order. Matching an existing shingle color on a 1940s home sometimes means ordering direct from the manufacturer, and we’ll tell you that honestly at the estimate.
Common Roof Repair Problems We See in Alamo Heights Homes
- Live oak litter in the valleys. Alamo Heights streets are lined with mature live oaks, and their leaves pile up in roof valleys faster than homeowners can clean them. Trapped moisture rots the underlayment and the decking beneath, which turns a simple valley repair into a structural one on older homes.
- Moss and algae on north-facing slopes. Humid spring air plus constant shade equals moss growth on the north side of many Alamo Heights roofs. Moss eats through underlayment over time and shortens shingle life; we remove it and treat the surface before replacing any damaged shingles.
- Cracked clay tile on ranch additions. The 1950s ranch additions with original clay tile crack under hail or intense heat. When a technician reuses old tiles without checking the underlayment beneath them, the repair fails. We check the underlayment first, every time.
- Flat patio cover seams leaking at the valley junction. Flat patio covers tied to roof valleys leak at the metal seam because that junction is rarely reinforced during a standard shingle-only repair. This is the most common call we get after a hard Alamo Heights storm.
On Arcadia Place, our crew repaired a 1940s cottage where years of live oak litter had trapped moisture along the valleys. We replaced the rotted decking, added ice and water shield in the valleys, and re-flashed the junction where the valley drained onto a flat patio cover, then installed GAF architectural shingles with a starter strip and new drip edge to stop the leak for good. That’s not marketing copy. It’s what a typical Alamo Heights repair looks like.
See the difference
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After
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AfterPricing for Roof Repair in Alamo Heights, TX
Here’s what you can expect to pay in Alamo Heights right now. A standard shingle repair runs $425 – $800. Shingle replacement with decking correction runs $850 – $1,850. Flat roof patches run $475 – $900, and a full recoat of a larger flat section runs $1,200 – $2,400. Valley flashing repair runs $600 – $1,400 depending on how much of the metal needs to be replaced. These are real numbers for this market, not statewide averages. What moves the price is what we find when we pull the first course of shingles or open the flat roof seam: decking condition, underlayment condition, and whether the junction needs custom metal. Before any work starts, you get a written price in Alamo Heights. No surprises on the invoice. Call (254) 276-4369 for a free estimate, and you’ll know exactly what you’re paying before we order the first bundle.
Written by Grant Whitlock, Owner at Mercer Roofing Co San Antonio.
We Also Serve Cities Near Alamo Heights
Our crews serve Alamo Heights and the surrounding communities, including San Antonio, Schertz, Cibolo, and Boerne. If you’re on the edge of Alamo Heights and wondering whether we cover your street, call (254) 276-4369. If we can’t get to you, we’ll tell you straight.
Serving Alamo Heights, TX - Our Local Coverage Area
We’re based in the Alamo Heights area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Roof Repair in Alamo Heights
Because live oaks canopy most streets in Alamo Heights, and their leaves collect in valleys and trap moisture against the shingles and underlayment. Over time, that trapped moisture rots the underlayment and decking beneath the valley. A repair that only replaces surface shingles misses the rot underneath, so the leak comes back. Valley work on these homes means opening the valley, inspecting the decking, adding ice and water shield, and re-flashing properly. Call (254) 276-4369 for a quote on valley repair; we’ll give you a written price before touching anything.
It changes everything, because the decking under your shingles was likely installed before modern spacing standards. Original 1930s decking boards are often too widely spaced or too thin for today’s asphalt shingles. When we pull the first course, we may find the decking needs correction before new shingles can be laid, and that’s a structural repair, not just a shingle swap. We’ll show you what’s under the shingles and give you a written price for the full job before we proceed. Call (254) 276-4369 to schedule a free inspection.
Yes, but matching original clay tile from a 1950s ranch addition takes time because those tiles are often no longer in standard production. We source close matches from salvage and specialty suppliers, and we’ll show you the match before we install it. More importantly, we check the underlayment beneath the cracked or missing tiles, because the tile is rarely the only failure. A clay tile repair in Alamo Heights starts around $600. Call (254) 276-4369 and we’ll walk the roof with you.
Granules in the gutter after a storm mean your shingles are losing their protective surface, and in Alamo Heights that’s usually from hail impact or heat aging, or both. Once the granules are gone, the asphalt beneath breaks down quickly, and the shingle loses its ability to shed water. It’s the earliest visible sign that a repair is needed. We’ll inspect the roof, replace the affected shingles, and tell you honestly how much life is left in the rest. Call (254) 276-4369 for a free estimate.
Yes, and not because of ice. Ice and water shield is a self-sealing membrane that protects the most vulnerable parts of your roof: valleys, eaves, and around penetrations. In Alamo Heights, the bigger threat is wind-driven rain and trapped oak litter in valleys, not ice dams. Installing ice and water shield in the valleys and along the eaves is one of the cheapest upgrades you can make during a repair, and it’s the difference between a leak that stops and a leak that comes back. We include it in valley repairs on older Alamo Heights homes as a standard practice. Call (254) 276-4369 to talk through your roof.
Contact Us for Roof Repair in Alamo Heights
If you live in Alamo Heights and something on your roof isn’t right, call us. You’ll get a live person at (254) 276-4369, a written price before any work starts, and a technician whose name and photo you’ll have before he arrives. We repair roofs here every week, and we know what these homes need. Call (254) 276-4369 for your free estimate.
Written by Grant Whitlock, Owner at Mercer Roofing Co San Antonio.