Full Roof Replacement in San Antonio, TX

Full Roof Replacement in San Antonio, TX

A full roof replacement in San Antonio typically runs between $9,800 and $18,500 for a standard single-family home, with most homeowners paying around $13,400 for architectural shingles on a 1,800-square-foot roof. That’s the honest range we quote every week at Mercer Roofing Co San Antonio, and it’s the number you should have in your head before anyone climbs a ladder. If your roof is past 20 years old, showing granule loss in your gutters, or leaking in more than one spot, replacement usually beats patching. Call us at (254) 276-4369 and we’ll give you a written price before any work starts – no exceptions.

We’re not here to sell you a roof you don’t need. We’re here because roofs in San Antonio take a beating from July heat, May hailstorms, and the occasional freeze-thaw cycle that cracks shingles along their nail lines. Full replacement isn’t a repair – it’s a tear-off down to the decking, new underlayment, new flashing, new shingles, new everything. Our parent page on Roof Replacement & Installation in San Antonio covers the broader service, but this page is about the full tear-off-and-replace job specifically. If you’re wondering whether you need it, keep reading.

When You Need Full Roof Replacement

Most San Antonio homeowners don’t need a new roof because one shingle blew off. They need it because the whole system hit the end of its useful life. Here’s what we actually see when we walk properties across Alamo Heights, Stone Oak, Helotes, and the older neighborhoods around Monte Vista:

• Granules in the gutter every time it rains. Asphalt shingles shed granules as they age. By the time you see piles of them, the shingles have lost their UV protection and are drying out fast. On a 15-plus-year-old San Antonio roof, this means replacement is coming sooner than you’d like.
• Shingles that are curling, cupping, or lifting at the edges. Heat does this. The sun bakes the top layer, the adhesive strip fails, and the shingle edge lifts. Once wind catches those edges, you lose shingles. Patching a few here and there won’t stop the next Nor’easter… or the next Hill Country thunderstorm.
• Daylight visible through the roof boards from the attic. Get up in the attic on a sunny afternoon. If you can see pinpricks or slivers of light through the decking, water can get in. That’s not a repair, that’s a re-roof.
• Leaks in two or more rooms at once. One isolated leak around a pipe boot or chimney flashing is repairable. Two or more leaks in different parts of the house means the underlayment and shingle field are failing broadly. Continuing to patch is like putting duct tape on a cracked foundation.
• Your roof is 18-22 years old and you’re planning to stay long-term. Three-tab shingles in San Antonio’s climate last about 15-18 years. Architectural shingles last a bit longer. If you’re closing in on two decades and you know you’ll be in the house another 10 years, replacing now saves you the cost of emergency repairs later.
• You just bought the house and the inspector flagged the roof. A lot of San Antonio resale homes have original roofs. If your inspection report called out “end of service life” or “general deterioration,” you’re not looking at a repair question. You’re looking at a replacement timeline. We’ll help you understand what the inspector meant in plain English.

Our Full Roof Replacement Process

You should know exactly what happens when you hire Mercer Roofing Co San Antonio. No surprises, no “while we were up there we noticed…” moments. Here’s the whole thing, step by step:

1. You call (254) 276-4369. A live person picks up. 24/7. No voicemail, no call-back form, no automated phone tree that sends you in circles. You tell us what’s going on and we schedule a visit.
2. You get the name and photo of your technician before they arrive. That’s the Threshold Verified standard, and we don’t bend it. Every Mercer technician is background-checked, identity-verified, and arrives in a clean, marked uniform with a photo ID badge at the door. If there’s ever a knock at the door without a name and photo sent ahead, that’s not us.
3. We inspect the roof and give you a written price. Not a verbal estimate, not a ballpark. A written price, line by line, for the complete job. It includes tear-off, dump fees, underlayment, flashing, shingles, clean-up, and the warranty terms. That written price is given before any work starts – and it’s the price you’ll pay. Nothing gets added on because we “discovered” something. If we find rotted decking, we show you a photo and we talk about it before we touch it.
4. Tear-off and decking inspection. We remove the old shingles and underlayment down to the roof deck. If we find soft or rotted boards, we replace them. This is also when we inspect the flashing around chimneys, vents, and valleys. Old flashing gets replaced – never re-used. Re-using old flashing is a shortcut that fails in a few years, and it’s the kind of thing you’d never know happened until water starts staining your ceiling.
5. New underlayment, new flashing, new shingles. We install synthetic or felt underlayment per manufacturer spec, new drip edge, new valley flashing, new pipe boots, and your new shingle system. We work with manufacturer-recognized brands – GAF, CertainTeed, Owens Corning, and Boral are the ones we install most often in San Antonio, chosen for how they hold up under Texas sun.
6. Clean-up, walk-through, and your written guarantee. We magnet-sweep the yard for nails, remove all debris, and walk the roof with you (or show you photos from up top if you’d rather not climb). You get a written guarantee on the workmanship. And the whole job falls under the 365-Day Done Right Promise – if anything isn’t right within a year, we make it right. You’ve got the promise in writing, not in a handshake.

Start to finish, a typical full roof replacement in San Antonio takes 1 to 2 days for a single-story home, and 2 to 3 for a two-story or a steep-pitch roof. Weather is the wildcard. If a storm rolls in mid-tear-off, we tarp the roof and resume when it’s safe. Your roof never sits exposed overnight without protection.

Full Roof Replacement Pricing in San Antonio

Here are the numbers we quote for full roof replacement in San Antonio in 2026. These are for architectural asphalt shingles, which is what 85% of our customers choose. If you want a specific brand or upgrade, we’ll price that separately and you’ll see the difference in writing.

Roof Size / Home Size	Typical Range (Tear-off + Install)	What It Includes
1,200-1,400 sq ft home (compact single-story)	$7,800 – $10,500	Full tear-off, underlayment, architectural shingles, flashing, clean-up, 365-Day Done Right Promise
1,500-1,800 sq ft home (typical 3-bedroom)	$9,800 – $13,400	Same as above, plus ridge vent replacement and drip edge
2,000-2,500 sq ft home (larger single-story or two-story)	$12,500 – $16,800	Same as above, plus additional valley flashing and pipe boots
2,600-3,200+ sq ft home (large two-story or complex roofline)	$16,000 – $22,000+	Same as above, with added labor for steep pitch and multiple valleys

What moves the price up or down is simple: roof size, pitch (a steep roof is slower and more dangerous), number of valleys and penetrations, and whether the decking needs replacing. Rotted decking runs about $2.50 to $3.50 per square foot to replace, and we’ll show you the rot before we replace it. No blind charges.

Premium shingle brands like CertainTeed or Owens Corning duration lines add roughly 10-18% over a standard architectural shingle. GAF Timberline systems sit in a similar range. If you’re considering Boral steel or stone-coated steel, that’s a different product entirely – we’ll talk through the cost per square and the longevity trade-offs for San Antonio’s hail season before you commit.

Every quote from Mercer Roofing Co San Antonio includes a written price before any work starts. That’s not conditional, not promotional, not a “sign today” thing. It’s how we operate. And the estimate is free. Call (254) 276-4369 and we’ll come out, measure, and put the number in your hands.

What Sets the Mercer Roofing Co San Antonio Standard Apart

If you’re comparing full roof replacement quotes from a handful of San Antonio companies, here’s what you should be comparing beyond the dollar amount:

• The badge at the door. Every Mercer technician is background-checked, identity-verified, and dispatched under the Threshold Verified standard. Before your technician arrives, you get their name and photo sent to you. When they knock, they’re in a clean Mercer uniform with a photo ID badge visible. This is the standard we’re contractually held to as part of the Threshold Group family, and it’s non-negotiable.
• The 365-Day Done Right Promise. If the work isn’t right within a year, we make it right. In writing. No fine-print carve-outs. If a repair or replacement isn’t holding up, you call, we come back, we fix it. Free.
• The written price guarantee. You get a written price before work starts, every time. The price on the paper is the price on the invoice. If we find additional work needed mid-job, we show you, we price it, and we don’t touch it until you say go.
• A live person answers the phone, 24/7. Roof leaks don’t wait for business hours. When you call Mercer Roofing Co San Antonio at (254) 276-4369, a real human being picks up. Day, night, weekend, holiday. Try it – even if you’re just comparing contractors, call us and see who picks up.

We’re part of the Threshold Group family, founded in 2000, and each location is independently owned and operated. This San Antonio location is run by Grant Whitlock, and when you hire us, you’re hiring his team – locally dispatched, locally accountable, and held to the Threshold Verified standard on every single visit.

Full Roof Replacement vs. Repair: How to Decide

We tell homeowners this every week: if the roof is under 10 years old and the damage is isolated to one area (one storm, one branch, one failed pipe boot), repair it. If it’s over 15 years old and you’re seeing problems in multiple places, stop patching. You’re spending good money to extend a roof that’s already on borrowed time.

Here’s the math. A repair might cost $400 to $900. A full replacement costs $10,000 to $15,000. But if you’re doing two or three repairs a year and the roof is 18 years old, you’re going to spend $2,000 to $3,000 annually on temporary fixes while the underlying system keeps failing. Within a few years, you’ve spent close to replacement cost anyway – and you still have an old roof.

The real question is when, not if. If you can plan the replacement on your schedule, you can budget for it, choose your shingle brand deliberately, and avoid emergency leak repairs at 2 a.m. That’s the saner path. Call us and we’ll help you figure out where your roof actually is in its life cycle – not where a salesperson wants it to be.

San Antonio Roofing Conditions Worth Knowing

Your roof’s lifespan in San Antonio is shaped by three local realities that don’t apply the same way in, say, Seattle or Chicago:

• Hail. The San Antonio area sits in what insurers call “Hail Alley.” Spring storms can dump golf-ball-sized hail that dimples shingles and voids their useful life, even when they don’t create immediate leaks. Hail damage doesn’t always show up as a leak right away – it shows up as accelerated granule loss and shingle failure two to five years down the road. We see this in neighborhoods like Stone Oak and far Northwest Side regularly.
• UV intensity. July and August heat in San Antonio regularly pushes roof surface temperatures past 160 degrees. That’s brutal on asphalt shingles. Over years, it dries out the asphalt layer, causing the shingles to become brittle and crack near the nail line. A roof that looks okay from the curb may be a year away from shingle blow-offs once the monsoon-season winds kick in.
• Freeze-thaw cycles. San Antonio doesn’t get many hard freezes, but when it does (like February 2021), the cycle of water expanding and contracting in micro-cracks accelerates shingle deterioration fast. If your roof survived that freeze but was already aged, the clock sped up.

For all these reasons, we recommend architectural shingles for almost every San Antonio full roof replacement. They’re thicker, hold up better against hail, and carry 30-year to lifetime manufacturer warranties when installed to spec. A few hundred dollars more than three-tab up front, and substantially better performance over the life of the roof.

Shingle Brands We Install and Recommend

Mercer Roofing Co San Antonio installs shingles from manufacturer-recognized brands, and we stand behind whichever system you choose. The two we recommend most often for San Antonio’s climate:

• GAF Timberline HDZ or UHDZ. Strong hail rating, widely available, and a manufacturer warranty that transfers if you sell the house. It’s a solid default choice for most San Antonio homes.
• CertainTeed Landmark or Landmark Pro. Slightly heavier than standard architectural shingles, excellent dimensional look, and proven durability in high-UV climates.

We also install Owens Corning Duration and Boral roof systems. The right pick depends on your budget, your home’s roofline, and whether you’re looking for maximum longevity or a specific aesthetic. We’ll show you samples and give you the real-world pros and cons of each – not a sales pitch, just the facts. Every brand we install is covered by our 365-Day Done Right Promise on workmanship, and every job gets a written guarantee.

FAQs – Full Roof Replacement

How much does a full roof replacement cost in San Antonio?

A full roof replacement in San Antonio typically costs between $9,800 and $18,500 for a standard single-family home, with most jobs landing around $13,400 for architectural shingles on a 1,800-square-foot roof. What moves the price: roof size, pitch, number of valleys and penetrations, decking condition, and shingle brand. Call (254) 276-4369 for a free written estimate – the price we give you before work starts is the price you’ll pay.

How long does a full roof replacement take in San Antonio?

Most full roof replacements in San Antonio take 1 to 2 days for a single-story home and 2 to 3 days for a two-story or steep-pitch roof, weather permitting. If storms delay work mid-job, we tarp the exposed roof and resume as soon as it’s safe. Call (254) 276-4369 to schedule an inspection and we’ll give you a realistic timeline for your specific roof.

Is it cheaper to repair or replace a roof?

It depends on the roof’s age and condition. For a roof under 10 years old with isolated damage, repair is usually cheaper. For a roof over 15 years old with multiple problem areas, continued repairs cost more over time than a full replacement. We’ll give you the honest assessment based on what we see up close – not a one-size-fits-all answer. Call (254) 276-4369 for an inspection.

Why choose Mercer Roofing Co San Antonio for roof replacement?

Because we put everything in writing: your price, your guarantee, and exactly who is coming to your door. Every technician is background-checked, identity-verified, and photo-badged under the Threshold Verified standard. Your technician’s name and photo are sent to you before they arrive. We’re part of the Threshold Group family, founded in 2000, and every full replacement carries the 365-Day Done Right Promise. Call (254) 276-4369 and you’ll get a live person, not a voicemail.

Ready to Talk About a Full Roof Replacement?

If your roof is at the end of its life, or if you just want an honest second opinion on whether it’s time, call Mercer Roofing Co San Antonio at (254) 276-4369. You’ll get a live person on the line, a free inspection, and a written price before any work starts. We serve all of San Antonio, including Stone Oak, Alamo Heights, Helotes, Monte Vista, the far Northwest Side, and the surrounding Hill Country communities. No high-pressure sales, no “sign today” gimmicks. Just a straight answer about your roof and a written number you can trust.

Written by Grant Whitlock, Owner at Mercer Roofing Co San Antonio, serving San Antonio.