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CertainTeed Roofing in San Marcos, TX | Mercer Roofing Co Austin
Mercer Roofing Co Austin provides independent CertainTeed roofing service across San Marcos, from shingle replacement and valley repair to full roof decking replacement. We’re not a manufacturer affiliate; we’re a local crew that works on CertainTeed systems every week and knows how Landmark, Landmark Pro, Presidential Shake, and XTM 30 shingles actually hold up against Hill Country hail and flash flooding. The work we do in San Marcos differs from Austin or Cedar Park because the housing stock here mixes 1950s bungalows with spaced decking and new subdivisions with composition shingles, and each requires a different approach. Call (361) 202-8874 for a free estimate.
Why San Marcos Residents Choose Us for CertainTeed Service
CertainTeed builds a solid shingle, but up on a San Marcos roof, the difference between a repair that lasts and one that fails in the next storm comes down to the crew doing the work. Our roofers at our Roofing Company in San Marcos spend their days on CertainTeed systems across San Marcos, from starter shingles up through ridge caps, learning exactly how each component ages under Hill Country heat and hail. When we find a problem, we explain it in plain language and put the price in writing before any work starts. Every repair carries a written guarantee for 365 days under our Done Right Promise: if it isn’t right within a year, we make it right, and a failed repair gets a free second visit. Grant Whitlock, our owner, learned roofing at Los Angeles Trade-Technical College and has spent decades on everything from flat commercial decks to steep residential pitches. He’s the one who set the standard we follow: show up on time, tell the homeowner what you found, and never pad an estimate to cover work that isn’t needed.
We also know that opening the door to a roofing crew is a real concern for a lot of San Marcos homeowners, especially people home alone during the day, parents with young kids, and older residents. So before any tech arrives, we send the name and photo of the person coming to your door. They arrive in a clean, marked uniform with a photo ID badge, and they’ve passed a background check as part of the Threshold Verified standard. You’ll know exactly who is walking up your driveway. For the full picture of how we handle CertainTeed sales & service, that page covers our broader approach.
Styles & brands we work with
Common CertainTeed Roofing Problems We Solve in San Marcos
- Hail-split XTM 30 three-tab shingles on older homes near the university. The 1950s and 1960s bungalows east of Texas State often still have their original CertainTeed XTM 30s. Spring hail splits these shingles easily, and when the decking underneath is spaced boards rather than solid plywood, water tracks straight through to the ceiling below. We see this all over San Antonio Street and the surrounding blocks.
- Granule shedding on Landmark shingles after repeated hail impacts. Homes along the I-35 corridor get pounded year after year by the same storm tracks. Granule loss exposes the fiberglass mat underneath, which breaks down fast in the Texas sun. Once the mat is visible, UV damage accelerates and leaks follow. We replace these slopes with exact-match Landmark pieces when the damage is isolated, or quote a full reroof when the whole roof is compromised.
- Valley leaks from pecan and post oak debris. Older neighborhoods along the Hill Country edge have big pecan and post oak trees dropping leaves, twigs, and acorns into roof valleys all year. Debris dams hold water against shingle edges, and over time that standing water works into the underlayment and decking. Valley repair is one of our most common CertainTeed service calls in San Marcos.
- Wind blow-off at rake edges on low-slope ranch houses. The 1970s and 1980s ranch-style homes in San Marcos were often built with low-slope roofs and builder-installed nails that missed the nailing strip on the shingles. Hill Country wind gusts catch those loose rake edges and peel shingles right off. Repair means re-nailing through the correct nailing strip, not just gluing the tab back down.
- Decking failure requiring full redecking before CertainTeed replacement. Spaced board decking on pre-1990 homes is simply too gapped for modern architectural shingles to be nailed properly. CertainTeed’s installation requirements assume a solid substrate. When we strip an old roof off a San Marcos bungalow, we often have to re-nail or replace decking before laying Landmark or Landmark Pro. It adds cost, but skipping it means the new shingles fail early.
CertainTeed Service in San Marcos: What Local Conditions Mean for Your Roof
San Marcos sits on the edge of the Texas Hill Country, so the spring hail lines that roll down from the hills hit roofs here hard. What makes this city genuinely different from Austin or Cedar Park is what sits under the shingles. A large share of the homes east of the university were built before 1970 with original cedar shake or three-tab CertainTeed shingles layered over spaced decking. That spacing was fine for the old material, but CertainTeed’s newer architectural shingles like Landmark Pro cannot be properly nailed to spaced boards without full redecking. The nail pattern simply doesn’t land on enough solid lumber. When a San Marcos homeowner gets a hail damage settlement and wants to upgrade from old three-tabs to Landmark Pro, our quote has to include stripping to deck and re-nailing or replacing those boards. Roofers outside this area sometimes miss that, and the homeowner ends up with a new roof that fails its wind warranty because the decking underneath was never brought up to standard. Grant has pulled more than one quote from another company off a kitchen table in San Marcos and showed the homeowner exactly what was left out. If you’re in the San Marcos service area, you can see the full scope of what we handle locally.
CertainTeed Models & Products We Service in San Marcos
We work on the full CertainTeed residential lineup: Landmark architectural shingles, the upgraded Landmark Pro, Presidential Shake for premium dimensional looks, and the three-tab XTM 30 found on older San Marcos homes. For repairs, we replace damaged shingles with exact-match pieces from our stock, so the color and shadow line match the existing slope. We keep common Landmark and Landmark Pro colors on hand for faster turnaround across San Marcos. When a repair calls for ridge caps, starter strips, or leak barriers, we use OEM CertainTeed accessory components. Mixing brands on hips, ridges, and flashing voids the system warranty, and we won’t do it just to save a few dollars. If a slope is too far gone for patching, we quote a full reroof using the same CertainTeed line, so the warranty stays consistent across the whole roof.
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AfterCertainTeed Service Pricing in San Marcos
CertainTeed repair pricing in San Marcos varies by what we find when we get on the roof, but here’s an honest range based on what we quote most weeks:
- Isolated shingle replacement (hail or wind damage): $350 to $650 depending on access and slope pitch.
- Valley repair with debris removal and new flashing: $450 to $900 when the underlayment is still intact; more if decking replacement is needed.
- Full roof decking replacement before CertainTeed install: $2.50 to $4.50 per square foot of decking, plus disposal.
- Full CertainTeed Landmark reroof (average San Marcos home): $9,500 to $16,500 depending on square footage, tear-off layers, and decking condition.
Every quote includes a written line-item breakdown before work starts, so you know what you’re paying for and nothing appears on the invoice that wasn’t discussed. Call (361) 202-8874 for an exact quote. Estimates are free.
Serving San Marcos, TX - Our Local Coverage Area
We’re based in the San Marcos 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 – CertainTeed Roofing in San Marcos
Older homes east of the university were built with spaced board decking, which doesn’t provide enough solid nailing surface for modern architectural shingles. CertainTeed Landmark requires a solid deck to meet wind warranty standards. Shingling over spaced boards leaves large sections of the shingle with nails that don’t hit lumber, and the first good Hill Country gust peels the roof off. We’d rather quote you the redecking up front than sell you a roof that fails its first season. Call (361) 202-8874 for a free inspection.
We start at the obvious spots: split shingles with exposed fiberglass, cracked ridge caps, and dinged flashing around penetrations and valleys. Then we look for what hail does that you can’t easily see from the ground, like loss of the shingle seal so the tabs lie flat and let wind-driven rain underneath. We also check the decking from the attic when we can, looking for water staining that tells us where the leak actually entered, not just where it shows in the ceiling. After the inspection, we send you a written price with photos. The repair carries a written 365-day guarantee, and if it leaks again within the year, we’re back out free.
We can usually match 15-year-old Landmark closely enough that the repair doesn’t stand out, using exact-match pieces from our stock. The color shifts slightly with age and sun exposure, so a brand-new shingle next to a 15-year-old one will show a seam on close inspection. If the damaged area is small and the rest of the slope is sound, a patch makes sense. If the shingles are at the end of their life with widespread granule loss, we’ll tell you honestly that patching is throwing money at a roof that needs replacement. You’ll get the price for both options, in writing, before you choose.
Pecan and post oak trees along the Hill Country edge drop a steady load of leaves, twigs, and acorns into roof valleys. Debris piles up, holds moisture against the shingle edges, and that standing water eats through the underlayment and into the decking below the valley. The shingles themselves can look perfect from the ground. When we handle our Roof Repair in San Marcos for a valley leak, we clear the debris, check the flashing and underlayment underneath, replace whatever’s compromised, and re-shingle the valley with exact-match CertainTeed pieces. It’s a straightforward fix, but it needs to be done right the first time. Call (361) 202-8874 to schedule a free estimate.
Landmark Pro is a thicker, heavier shingle with better impact resistance and a longer wind warranty than standard Landmark, and the price difference in San Marcos typically runs $1,500 to $3,000 on an average roof. Given the hail lines that roll down from the Hill Country every spring, the upgrade often pays for itself after one bad storm. Standard Landmark is still a solid shingle and meets code, but if your roof has been hit by hail before, we usually recommend the Pro. We’ll quote both so you can decide with real numbers. Estimates are free; call (361) 202-8874.
Service Areas Near San Marcos
Mercer Roofing Co Austin handles CertainTeed work across the I-35 corridor and the Hill Country edge. We serve CertainTeed service in Austin, including the Zilker neighborhood where summer hail keeps us busy, and CertainTeed service in Cedar Park for newer subdivisions. We also cover Brushy Creek, Hutto, and Lakeway.
Book Your CertainTeed Service in San Marcos Today
If your CertainTeed roof has been through a San Marcos hail season, don’t wait for the leak to show up in the ceiling. A live person answers our phone around the clock at (361) 202-8874. We’ll walk you through what to expect, send a photo-badged tech with a name you already know, and hand you a written price before any work starts. Your roof shouldn’t be something you worry about, that’s what we’re here for.
Written by Grant Whitlock, Owner at Mercer Roofing Co Austin, serving San Marcos and Central Texas since 2000.