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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Why Miami Homeowners Choose CertainTeed Roofing
Mercer Roofing Co Miami provides independent CertainTeed in Miami roofing repair, service, and installation across Miami, FL. We work on CertainTeed roofs every week, and we stock the specific flashings, underlayments, and accessories these systems demand in South Florida’s salt air and hurricane-driven rain. We are not an authorized CertainTeed contractor. We are independent roofers who know exactly how CertainTeed products fail in Miami and how to fix them right, with a written price before work starts and a written guarantee on every repair. Call (850) 753-2996 for a free estimate.
CertainTeed has earned its place on Miami roofs for good reason. Their Landmark architectural shingles hold up well under intense UV, and Flintlastic SA gives flat and low-slope roofs a self-adhered membrane that handles Miami’s thermal swings. But even the best materials have weak points here. Salt air corrodes metal flashings faster than manufacturers’ national averages suggest. Constant expansion and contraction works sealant strips loose over time. And when a tropical downpour sits on a low-slope section, any installation flaw becomes a leak. That is where our experience matters.
Grant Whitlock has spent the better part of three decades putting roofs on everything from Coral Gables bungalows to flat-top commercial buildings near Brickell. He knows what a CertainTeed roof should look like after five Miami summers, and what it should not look like. That knowledge goes into every diagnosis we write up.
Why Trust Mercer Roofing Co Miami for Your CertainTeed Roofing?
Our crews work on CertainTeed roofing systems every week across Miami, including Certainteed repair in Miami Gardens. That matters because CertainTeed products have specific installation details, specific flashing requirements, and specific failure patterns. A roofer who treats a Landmark shingle like any other architectural shingle will miss the signs that matter. We do not.
We use genuine CertainTeed replacement shingles, ridge caps, and underlayment whenever possible. That keeps your warranty intact and your color match close. When a color has been discontinued, we source confirmed aftermarket matches and tell you the difference honestly before we install anything. No silent substitutions.
Grant grew up in Los Angeles and learned the trade at Los Angeles Trade-Technical College before putting roofs on South Florida homes for decades. He walks every deck himself, and he has worked through enough Miami hurricane seasons to know exactly where a CertainTeed roof fails first: at the valleys, at the vent boots, and at the flashing transitions. That is where we start looking. Every technician who arrives at your door is background-checked, identity-verified, uniformed, and badged. We send their name and photo before they show up. A roof should not be something you worry about. That is our job.
Styles & brands we work with
Common CertainTeed Roofing Problems We Fix in Miami
- Wind-driven rain intrusion at valley intersections on Landmark roofs. CertainTeed valley metal, when worn or improperly lapped, lets water push sideways during Miami’s gusty thunderstorms. Water runs under the shingles instead of down the valley, and the ceiling stain shows up days later. We re-lap or replace the valley metal and resecure the surrounding shingles.
- Premature granule loss and sealant strip failure on Landmark shingles. Coastal Miami’s salt air and relentless UV break down the adhesive strip faster than in inland climates. Shingles lose granules, then their seal, and wind starts lifting them. This often looks worse than it is. We document the affected area, check the decking underneath, and repair the section if the roof still has service life.
- Curling and edge lifting on older Grand Manor shingles. Grand Manor is CertainTeed’s luxury line, thicker and heavier than Landmark. But after years of thermal cycling in Miami heat, plus inadequate attic ventilation, the edges can curl. Water finds those curled edges. We repair the affected sections and, when ventilation is the root cause, we tell you what needs to change.
- Adhesive bleed-out and seam separation on Flintlastic SA low-slope sections. Miami’s heavy afternoon downpours pond water on flat and low-slope roofs. Flintlastic SA is self-adhered, but ponding water plus intense heat can cause the seams to separate or the adhesive to bleed out. We cut back the failed section, re-prime the substrate, and install new Flintlastic SA, or we recommend a different low-slope system if the ponding is chronic.
- Cracked vent boots and failed pipe flashings. These are some of the most common leaks on any CertainTeed roof in Miami. UV rays break down the rubber boot around plumbing vents, water runs down the pipe chase, and the homeowner sees a stain on the ceiling below. We replace the boot with heavy-duty aluminum and a storm collar, then reseal the surrounding pipe flashing with CertainTeed-recommended cement.
CertainTeed Parts & Our Repair-vs-Replace Approach
For any CertainTeed repair in Miami, we start with genuine CertainTeed parts. Replacement shingles, ridge caps, and underlayment from the manufacturer keep the roof consistent in thickness, color, and performance. When CertainTeed has discontinued a color or product line, we source aftermarket matches that we have verified in the field. We tell you which is which before you pay a dime.
Our repair-versus-replace call is honest, even when honesty means a smaller job for us. If a CertainTeed roof has one failed vent boot and the surrounding shingles are sound, we replace the boot and reseal the area through our Roof Repair services. If the same zone shows repeated wind damage plus deteriorated decking underneath, we recommend a targeted tear-off and replacement. Layering patches over failing decking just hides the problem until the next hurricane season. We would rather do the job that actually holds.
We stock common CertainTeed flashings, pipe boots, ridge caps, and sealants locally so turnaround is days, not weeks. Call (850) 753-2996 and we will tell you what we have on the shelf for your specific roof.
Our CertainTeed Service Process – Step by Step
- 1
Diagnosis. We inspect the roof deck, the flashing points, and the shingle or membrane condition. We look for the failure pattern that matches your CertainTeed product, not just the visible symptom. You get a written explanation of what we found and what it means.
- 2
Written price before work starts. We give you a line-item price in writing. No work begins until you approve it. That is not a promotion. It is how we operate on every job, every time.
- 3
Repair or installation. We use genuine CertainTeed materials wherever possible, including matching shingles, ridge caps, and underlayment. We follow CertainTeed’s installation specs for the product line on your roof, because shortcuts in Miami’s wind zone do not last.
- 4
Testing. After the repair, we water-test the area where Miami leaks are hardest to trace: valleys, pipe penetrations, and low-slope seams. We want to see it hold before we call the job done.
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Written guarantee. Every repair includes a written guarantee. If the repair fails within 365 days, we come back and make it right at no additional cost. That is the 365-Day Done Right Promise, in writing.
See the difference
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AfterCertainTeed Products We Service & Install in Miami
We service and install CertainTeed Roofing in Fountainebleau, FL and the product lines most common on Miami roofs: Landmark architectural shingles, Grand Manor luxury shingles, Carriage House shingles, Flintlastic SA self-adhered low-slope membrane, and WinterGuard waterproofing underlayment. Each line has different installation tolerances and different failure signatures in Miami’s climate. We stock Landmark shingles in common colorways, plus the matching ridge caps, and we keep Flintlastic SA and WinterGuard on hand for flat-roof and eave-edge repairs. If your roof has a discontinued CertainTeed color, we will tell you what a close match looks like before we touch anything.
We Also Service These Brands
CertainTeed is a strong brand, but it is not the only one on Miami roofs. We also service GAF and Owens Corning systems, along with IKO, Atlas, Tamko, and Boral. If your roof is a mix of brands or you are not sure what was installed, we will tell you what we find during the inspection. Our job is to fix the roof you have, not to sell you a brand.
FAQs – CertainTeed Roofing Service in Miami
Yes, in most cases. We stock Landmark shingles in common Miami colorways and order matching bundles from local CertainTeed suppliers for active colors. If your color was discontinued, we source a confirmed aftermarket match and show you a sample before installation. The match will be close, but we will be straight with you if it will not be perfect. Call (850) 753-2996 with your shingle color and we will check availability.
No, Landmark shingles are manufactured to meet high-wind standards when installed per CertainTeed’s specs with the correct number of nails and the proper sealant engagement. What we see in Miami is installation-related: sealant strips that never fully bonded, valley metal lapped the wrong direction, or nails placed outside the nail line. Those are installation failures, not product defects, and they are repairable. We can inspect your Landmark roof and tell you which one applies.
Those bumps are typically from water vapor or air trapped under the self-adhered membrane, often worsened by Miami’s heat and a heavy downpour that pushed moisture into a small gap at a seam or termination point. The membrane looks fine until a storm, then the bumps appear. We cut back the affected section, re-prime the substrate, and install new Flintlastic SA. The fix costs less than a full membrane replacement if caught early. Call (850) 753-2996 for an inspection and an exact quote.
Yes. A leaking ridge vent on a Grand Manor roof usually comes from a broken vent cap, missing end caps, or failed sealant at the vent-to-shingle transition. We replace the damaged vent section or reseal the transition using compatible materials, then re-secure the surrounding Grand Manor shingles. A full ridge replacement is only needed when the vent itself is cracked along its length or the underlayment is compromised. We will tell you which it is before you approve the work.
Not necessarily. Granule loss in Miami’s sun is normal after 10 to 15 years, and it does not automatically mean the roof is failing. What matters is whether the shingle mat is exposed, whether the sealant strips are still holding, and whether the decking beneath is dry. If the shingles are sealed and the decking is sound, you may have years of service left. We will document the granule loss, check the attic side, and give you a repair-versus-replace recommendation in plain English. Call (850) 753-2996 to schedule that inspection.
CertainTeed repairs in Miami typically run between $350 and $900 for targeted fixes like vent boot replacement, valley metal re-lap, or a flashing repair. Larger repairs involving multiple shingle bundles, decking replacement, or Flintlastic SA membrane work range from $1,200 to $4,000 depending on square footage and access. Full CertainTeed roof replacement on a typical Miami ranch home usually falls between $12,000 and $24,000, though Grand Manor or Carriage House luxury shingles push toward the higher end. Call (850) 753-2996 for a written estimate specific to your roof, no charge.
Book Your CertainTeed Service in Miami, FL
If your CertainTeed roof is showing any of the problems we described, or you just want a straight answer about its condition, call Mercer Roofing Co Miami at (850) 753-2996. You will get a written price, a written guarantee, and a technician whose name and photo you already have before they knock. Free estimates, every time.
Written by Grant Whitlock, Owner at Mercer Roofing Co Miami, serving Miami since 2000.