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 San Antonio
A new roof in San Antonio usually runs between $8,500 and $16,000 for a standard single-family home with architectural composition shingles, and most full tear-off installations finish in two to four days. That’s the number homeowners actually need when they start calling around. Our crews work neighborhoods from Stone Oak to Alamo Ranch every week, so scheduling doesn’t drag out for weeks. If you’re watching granules pile up in your gutters or seeing daylight through the decking, call us at (254) 276-4369 and we’ll give you a written price before any work starts.
Why Mercer Roofing Co San Antonio Is San Antonio’s Preferred Roof Installation Company
San Antonio homeowners deal with something most roofing markets don’t: a conveyor belt of out-of-state storm chasers who appear after every hail event, quote low, and disappear before the next storm. We lose jobs to those crews every spring. Then we get called back to fix what they installed. Our reputation in San Antonio is built on the opposite approach. Grant Whitlock, who leads Mercer Roofing Co San Antonio, sends every technician’s name and photo before they arrive. They badge in at the door with photo ID. Every job includes a written price and a written guarantee. That matters here because San Antonio’s hailstorms create a perfect environment for door-knockers, and homeowners deserve to know exactly who’s on their property before they open the door. Part of the Threshold Group family, founded in 2000, we hold every visit to the Threshold Verified standard: background-checked, identity-verified, uniformed, and accountable.
Styles & brands we work with
TPO Roofing Installation in San Antonio
TPO Roofing Installation in San Antonio typically costs $7.50 to $11.00 per square foot installed, which puts most residential low-slope jobs between $9,000 and $15,000 depending on the square footage and whether the existing membrane comes off first. TPO is a white, heat-reflective single-ply membrane that works well on San Antonio’s low-slope suburban homes and porch roofs where shingles don’t shed water fast enough. Homeowners choose it when summer attic temperatures are pushing 140 degrees and they want something that reflects heat rather than absorbs it.
When TPO Makes Sense for a San Antonio Roof
If your roof pitch is too shallow for shingles, TPO is usually the answer. Some homes in areas like the older sections of Helotes and parts of Leon Valley were built with nearly flat roof sections that leak every time a spring supercell dumps two inches in an hour. TPO seals those sections with heat-welded seams, not nails, so there are no fastener holes for water to find.
What TPO Installation Involves
We strip the old roofing down to decking, check for hail-delaminated plywood, and replace any soft sheets before the membrane goes down. Then we install new drip edge, insulation board if needed, and mechanically fasten or fully adhere the TPO. Every seam gets heat-welded. We price the full scope in writing before we start, including any decking replacement we expect to find.
Shingle Roof in San Antonio
Shingle Roof installation in San Antonio ranges from $8,500 to $16,000 for a full tear-off and replacement on a typical 2,000 to 2,600 square foot home, with architectural shingles from GAF, CertainTeed, or Owens Corning making up most of that cost. San Antonio’s housing stock leans heavily toward composition shingle roofs over plywood decking, installed during the big suburban buildouts from the 1970s through the early 2000s. Those roofs have now lived through decades of hail seasons, and many are on their second or third patch job. When granule loss gets bad enough that you can see the fiberglass mat, replacement is the only honest fix.
Why Architectural Shingles Dominate San Antonio
Architectural shingles, sometimes called dimensional shingles, hold up better to impact than three-tab because they’re thicker and laminated. After what we’ve seen from San Antonio hail events, we rarely recommend three-tab to anyone. The cost difference is small, typically $800 to $1,500 on a full roof, and the impact resistance is meaningfully better. GAF Timberline HDZ and CertainTeed Landmark both carry Class 3 or Class 4 impact ratings in certain colorways, which some San Antonio insurers discount.
What a Full Shingle Tear-Off Includes
We take the old shingles, felt, and fasteners off. We inspect every sheet of decking. We replace what’s failed. Then we install new underlayment, drip edge, starter strip, and shingles in that order, because skipping any of those steps is how San Antonio roofs fail early. Our crews install ice and water shield in valleys and along eaves even though San Antonio rarely freezes, because our wind-driven rain hits those seams harder than ice ever will.
Trusted Brands We Service in San Antonio
Mercer Roofing Co San Antonio installs and repairs shingle systems from GAF, CertainTeed, Owens Corning, and Boral, with material choices matched to the specific exposure of each roof. If your home faces open prairie to the west in Bulverde or catches full sun all afternoon in Cibolo, that changes the shingle we recommend. We keep common flashing, underlayment, and starter materials stocked for San Antonio jobs, which means a torn-off roof gets buttoned back up without days of delays waiting on supply trucks. If you’re replacing a section rather than the full roof, we’ll match the existing shingle brand and color as closely as the manufacturer’s current lineup allows.
Common Roof Installation Problems We See in San Antonio Homes
- Hail-weakened decking that goes unnoticed. A roof can look fine from the ground, but once we tear off the shingles, the plywood underneath is often delaminated from years of impact. If we install over soft decking, nail pops start within two seasons and the warranty on the new roof means nothing. We price decking replacement into every San Antonio tear-off estimate as a per-sheet allowance, so there are no surprises mid-job.
- Storm chasers installing over old underlayment. After a major hail event, some out-of-town crews slap new shingles over whatever is already there. That hides rot, traps moisture, and leaves the roof deck to fail out of sight. A proper San Antonio re-roof means tearing to the decking and inspecting before anything new goes on.
- Missing drip edge and starter strip. San Antonio’s wind-driven rain gets under shingle edges when the drip edge is absent or poorly flashed. We replace drip edge and starter strip on every full installation, because the eaves are where wind damage starts first on a spring storm afternoon.
- Improper permitting on structural replacements. San Antonio requires re-roofing permits only when the job involves structural changes, not simple shingle replacement. If your older home needs rafters or decking replaced, that triggers an inspection. Some contractors skip it to save time. We pull the permit and get the inspection passed before we call the job done.
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We Also Serve Cities Near San Antonio
Our San Antonio crews work throughout the northeast metro, including San Antonio, Schertz, Cibolo, Bulverde, and Floresville. If you’re just outside the city limits and dealing with hail damage or a roof that’s past its useful life, we’ll send the same Threshold Verified crew and the same written pricing. The Roof Installation team handles tear-offs, TPO, and shingle roofs across the whole service area, scheduled from our San Antonio office.
Serving San Antonio, TX - Our Local Coverage Area
We’re based in the San Antonio 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 San Antonio
Does San Antonio require a permit for a full roof replacement?
San Antonio requires a re-roofing permit only when the work involves structural changes to the roof assembly, not for simple shingle replacement over existing decking. If we find rotted rafters, failed decking, or need to alter the structure in an older home, we pull the permit and get the inspection scheduled before we finish the job. For a straightforward tear-off and re-shingle with no structural work, no permit is required under current city rules. Call (254) 276-4369 if you’re unsure whether your specific roof needs one, and we’ll tell you straight.
How do San Antonio hail storms affect new roof installation?
Hail accelerates granule loss and impact damage on shingles, which is why San Antonio roofs often need replacement a decade sooner than roofs in Dallas or Houston. When we install a new roof here, we choose impact-rated architectural shingles and full ice and water shield in valleys and eaves specifically because the next spring supercell is not a hypothetical in this city. Some insurers offer premium discounts for Class 4 impact-rated shingles, and we’ll help you sort out whether your policy does.
What’s the biggest hidden cost when replacing a roof on a 1970s-era San Antonio home?
Decking replacement is the cost that moves a quote the most on older San Antonio homes. Homes built in the 1970s and 1980s, especially in neighborhoods that have been through multiple hail events, often have plywood that delaminated under the shingles without anyone knowing. In Alamo Heights, our crew opened up a 1986 composition shingle roof and found the original decking had delaminated under years of hail strikes. We stripped to the rafters, replaced 14 sheets of plywood, and upgraded to GAF Timberline HDZ architectural shingles over a full ice and water shield, all priced and approved in writing before we touched the first sheet. That’s why our estimates include a per-sheet decking allowance with everything spelled out, so the invoice matches the contract.
Why do you install ice and water shield in San Antonio when it rarely freezes?
Ice and water shield is a self-sealing membrane that protects the roof’s most vulnerable seams, and in San Antonio the threat is wind-driven rain, not ice dams. Our storms push water sideways into valleys, eaves, and around penetrations in ways a standard underlayment does not stop. Installing it in those zones costs a couple hundred dollars on a full roof and prevents leaks that start the first time a supercell hits from the southeast. It’s cheap insurance against the exact weather pattern we get every April and May.
How many squares should my San Antonio roof quote include?
A square equals 100 square feet of roof area, and most San Antonio single-family homes range from 18 to 32 squares depending on the footprint and overhang. A 2,200 square foot ranch built in the 1980s typically roofs out around 24 to 28 squares once pitch and overhangs are factored in. If two quotes for the same home list different square counts, one of them is wrong, and that’s a red flag worth questioning before you sign anything. We measure every roof by hand or with satellite takeoff tools and show you the square count on the written estimate. Call (254) 276-4369 for an exact measurement and price.
Get Your San Antonio Roof Installation Estimate
If you’re in San Antonio and you’re ready to know what a new roof actually costs, call Mercer Roofing Co San Antonio at (254) 276-4369. You’ll get a real person on the phone, not a voicemail, and we’ll schedule a time for our crew to measure, inspect, and give you a written line-item price. Every technician we send is background-checked, identity-verified, and arrives in a marked uniform with photo ID, and we send their name and photo before they show up. The estimate is free, the price is written, and the work is covered by our 365-Day Done Right Promise. If it’s not right within a year, we come back and make it right.
Written by Grant Whitlock, Owner at Mercer Roofing Co San Antonio, serving San Antonio since founding in 2000.