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 Installation Across Alamo Heights
Roof installation in Alamo Heights typically runs between $11,500 and $28,000 for a full tear-off and replacement on the 1,400 to 2,400 square foot homes common here, with standing seam metal and tile landing at the upper end. Most projects take three to five working days once materials arrive, though the permit inspection can add a few days depending on what the city finds when the old roof comes off. Our crews know Alamo Heights streets like Morton, Normandy, and Arcadia because we work them every week. Call (254) 276-4369 for a written estimate, and you’ll have a real number before anyone climbs a ladder.
Why Mercer Roofing Co San Antonio Is Alamo Heights’s Preferred Roof Installation Company
Alamo Heights homeowners call us because we tell them exactly who is walking up the driveway before the appointment. Every Mercer technician sends their name and photo ahead of the visit, then badges in at the door with a photo ID. That matters in a neighborhood where people open the door to strangers with real hesitation. We’re part of the Threshold Group family, founded in 2000, and every location is independently owned and operated under the Threshold Verified standard: background-checked, identity-verified, uniformed technicians on every job.
Grant Whitlock leads our San Antonio office, and he holds his crews to one rule that shapes how we work in Alamo Heights: no work starts without a written price. Not a verbal estimate, not a handshake. A line-item document you can read at your kitchen table. And every roof installation includes the 365-Day Done Right Promise, which means if something isn’t right within a year, Mercer makes it right. That guarantee is written into your contract, not mentioned in passing.
We also understand what Alamo Heights homes actually look like from the top down. These aren’t uniform subdivision roofs. They’re 1920s cottages with original framing quirks, 1950s ranch styles with later additions, and hybrid systems where clay tile meets composition shingle at odd angles. Our crews see those junctions before they cause problems, not after.
Styles & brands we work with
Standing Seam Metal Roof in Alamo Heights
Standing seam metal roof installation in Alamo Heights is a specific answer to a specific problem: intense Texas sun and hail that chew through composition shingles faster than anyone expects. A standing seam system runs $19,000 to $34,000 on most Alamo Heights homes, depending on roof complexity and whether we’re replacing existing decking underneath. The panels interlock along raised vertical seams, which means no exposed fasteners for wind to work loose and no sealant at the seams to dry out in the heat. The metal itself is coated for reflectivity, and we see attic temperatures drop measurably compared to dark asphalt shingles, which translates to lower cooling bills through July and August.
Standing seam metal also handles the leaf and branch issue that defines Alamo Heights roofs better than almost any other material. Live oak debris doesn’t get caught on the long, smooth panels the way it does on shingle granules. It slides off. That’s not a minor point when half the roofs we tear off in this city are hiding rot from years of trapped leaves.
Metal roofing panels matched to older rooflines
Alamo Heights is full of low-slope ranch roofs and cottage gables that weren’t designed for modern metal panel profiles. We measure every plane, order panels cut to length per slope, and custom-break the trim rather than forcing stock pieces onto a 1940s eave line. The result is a clean, tight install that doesn’t look like a patchwork on a 75-year-old house.
When metal roof install makes more sense than another shingle roof
If you’re replacing a roof for the second or third time on a home you plan to keep, the math often shifts toward standing seam metal. You pay more upfront, but the panel system typically carries a 30 to 50 year finish warranty depending on the manufacturer, and the roof itself rarely needs to be replaced in your lifetime. That’s a real consideration for Alamo Heights homeowners who have already replaced a shingle roof twice in 20 years.
Tile Roof in Alamo Heights
Tile roof installation in Alamo Heights is about respecting what’s already there. Many homes in this city have clay tile additions from mid-century remodels, and homeowners often want to keep that look when the time comes for a full replacement. Tile runs $24,000 to $42,000 for a typical Alamo Heights roof, and the cost is driven less by the tile itself and more by the substrate work underneath. Clay tile is heavy, and original 1×6 plank decking from the 1920s often can’t carry today’s tile weight without reinforcement. We address that before the first tile goes down.
Tile handles Alamo Heights sun better than anything else we install. It doesn’t granulate like composition shingles, and it won’t dent under the kind of hail that totals an asphalt roof. The tradeoff is weight and the need for a perfectly solid deck underneath. We inspect the rafters and the decking during tear-off and document what we find. If the framing needs reinforcement, that’s written into the allowance before work proceeds.
Replacing cracked clay tile on older Alamo Heights homes
Cracked and spalled clay tiles are common on Alamo Heights roofs more than 20 years old, particularly on south and west-facing planes. The replacements need to match the existing tile profile or the repair is visible from the street. We source period-appropriate tiles when possible and set them with the same fastening pattern the original installer used.
Flashing the shingle-to-tile transition
The junction where a clay tile section meets a composition shingle section is the single most common leak point we find on Alamo Heights hybrid roofs. The two materials expand and contract at different rates, and the flashing between them gets worked loose over a few seasons. On a full tile installation, we custom-break transition metal pieces that accommodate that movement instead of using a one-size stock flashing and hoping for the best.
Trusted Brands We Service in Alamo Heights
We install and repair systems built by GAF, CertainTeed, Owens Corning, IKO, Atlas, and Tamko, which means if your Alamo Heights home already has one of those brands, we can match the product without a full tear-off. We keep common flashing, underlayment, and accessory parts stocked for Owens Corning, IKO, and Atlas systems specifically, so a repair on one of those roofs doesn’t mean waiting on a distributor order. When you choose a shingle system for your Alamo Heights home, we walk you through the warranty differences between these manufacturers in plain English before you sign anything.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Installation Problems We See in Alamo Heights Homes
- Original plank decking that can’t pass today’s inspection. Most 1920s through 1950s Alamo Heights roofs have spaced 1×6 boards, not solid plywood or OSB. The city now requires solid sheathing on a full replacement, which means the decking upgrade is part of the job even though it wasn’t on the original estimate. We write a decking allowance into every Alamo Heights contract so this isn’t a surprise change order.
- Live oak leaves in the valleys causing hidden rot. The mature oak canopy that makes Alamo Heights beautiful also drops leaves into roof valleys every fall, and those leaves sit there through humid springs, eating through underlayment. We routinely find rot in valley plywood that was invisible from the ground. On a full installation, we strip the valleys first and inspect the wood before anything gets covered.
- Hybrid shingle-and-tile roofing with failed transition flashing. Later remodel additions added clay tile or metal sections onto original composition roofs, and the junction between the two materials was rarely flashed correctly. This is the first place leaks appear on Alamo Heights hybrid roofs. A new installation gives us the chance to rebuild those transitions the right way.
- Flat patio covers catching water from steep valleys. Many older Alamo Heights homes have flat patio covers that sit directly under converging roof valleys, and the original design funneled rainwater straight onto those covers with minimal metal protection. We reinforce those junctions with custom-bent metal and our freeze-resistant flashing standard applies to the valley where it ends, not just the roof itself.
Pricing for Roof Installation in Alamo Heights, TX
Here’s what Alamo Heights homeowners can expect to budget. A full composition shingle tear-off and replacement runs $11,500 to $18,000 depending on roof size, pitch, and how much decking replacement the inspection requires. Standing seam metal runs $19,000 to $34,000. Clay tile runs $24,000 to $42,000. The big variable in Alamo Heights specifically is decking: if the original 1×6 planks have rot, gaps, or knots, the city requires solid sheathing before any roof system goes on, and that adds $2,800 to $7,000 to the project depending on square footage. Every estimate is a written, line-item document completed before you commit to anything. Call (254) 276-4369 to schedule a free inspection and get exact numbers.
We Also Serve Cities Near Alamo Heights
Our crews work throughout Alamo Heights and the surrounding communities, including San Antonio, Schertz, Cibolo, and Boerne. If you’re outside Alamo Heights proper but need a Roof Installation team that understands older neighborhood housing stock the way we do, call us and we’ll let you know if we cover your street.
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 Installation in Alamo Heights
Yes, Alamo Heights requires a permit for a full roof replacement, and the city inspection after decking is stripped but before new roofing is installed is what triggers code upgrades like the solid sheathing requirement. This is the point where an older roof’s hidden problems, like rotted decking, missing underlayment, or undersized framing, get formally noted and must be addressed before the inspector signs off. We handle the permit, schedule the inspection, and write a decking allowance into your contract so the inspection doesn’t turn into a financial stall. Call (254) 276-4369 and we’ll walk you through the process for your specific house.
No, and you shouldn’t. Original wood shake under a newer composition layer means the original roof was never stripped, which means we don’t know what condition the decking and shakes are in until the top layer comes off. The city also won’t permit another layer over an existing layer in most cases. The right approach is a full tear-off to the decking, inspection of the original 1×6 planks, replacement of any rot with solid plywood to meet code, and then a clean installation of the new system. We found exactly this condition on Morton Street, where a 1940s cottage had its original cedar shake roof hidden under a single layer of composition shingles. The tear-off revealed decayed decking and missing underlayment, and we replaced the rotted sections and installed a GAF Timberline HDZ system with ice and water shield in the valleys and new drip edge and ridge vent. That’s the industry-correct sequence, and it’s the only way we’ll do it.
Alamo Heights has a concentrated live oak canopy that drops leaves directly into roof valleys, and those leaves trap moisture against the valley underlayment for months at a time during humid springs. Ice and water shield in the valleys gives the roof a self-sealing, waterproof layer at the exact junction where leaf-choked water concentrates, while the more open subdivisions in San Antonio don’t face the same sustained leaf contact. The material costs more, but it’s the difference between a valley that lasts 20 years and one that rots through in 12. We include ice and water shield in valleys on every Alamo Heights roof installation.
An architectural shingle from GAF, Owens Corning, or CertainTeed will hold up to typical Alamo Heights hail if it’s installed over solid decking with proper fastening, though you’ll replace it sooner than tile or metal. Shingle roofs on Alamo Heights homes generally last 14 to 20 years before granule loss and heat damage make replacement necessary. Tile and standing seam metal last 30 to 50 plus years and handle both sun and hail with far less maintenance. If you plan to stay in the home more than 15 years, the higher upfront cost of tile or metal often makes more sense. If you’re selling sooner, a high-quality architectural shingle keeps your entry price lower. Call (254) 276-4369 and we’ll quote all three options for your specific roof so you can compare real numbers.
The right fix is custom-bent metal flashing that lines the valley runout and extends onto the patio cover with proper slope and kickout, not more sealant. Many original Alamo Heights patio covers were built with inadequate metal at the valley junction, and decades of concentrated water flow have corroded the original flashing or worked it loose. We remove the existing metal, inspect the patio cover framing for rot, replace what’s needed, then custom-fabricate and install the transition flashing so water flows off the roof and over the cover rather than pooling against the junction. This is one of the most common calls we get in the older sections of Alamo Heights, and the fix is permanent when done with the right metal.
If you’re ready for a real number on your Alamo Heights roof, call (254) 276-4369 and ask for a free estimate. We’ll send a technician’s name and photo before we arrive, badge at the door, and put every price and guarantee in writing before any work starts.
Written by Grant Whitlock, Owner at Mercer Roofing Co San Antonio, serving Alamo Heights and surrounding communities since 2000.