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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
CertainTeed Roofing in Miami Gardens, FL | Mercer Roofing Co Miami
We provide Certainteed sales & service across Miami Gardens, and the thing that separates our work here is straightforward: we know what happens when CertainTeed materials meet Miami Gardens’ original flat gravel roofs and HVHZ code. Most CertainTeed jobs in this city start with a full tear-off, not an overlay, because the old built-up roofing underneath has to come off before anything new goes down. Call (850) 753-2996 for a written estimate.
Mercer Roofing Co Miami specializes in CertainTeed roofing systems throughout Miami Gardens as our Roofing Company in Miami Gardens, from ripping out original built-up gravel roofs to installing dimensional shingle lines like Landmark. We’re an independent service provider, not a manufacturer-authorized dealer, and our crews work on CertainTeed products because they perform well in South Florida heat and storms when installed correctly. Grant Whitlock, our owner, learned the trade at Los Angeles Trade-Technical College and has spent nearly three decades putting roofs on everything from Coral Gables bungalows to flat-top commercial buildings near Brickell. He shows up to every inspection himself, walks the deck, and gives homeowners a straight number with no line-item surprises.
Why Miami Gardens Residents Choose Us for CertainTeed Service
CertainTeed makes good roofing materials. But a shingle is only as good as the deck underneath it, and in Miami Gardens the deck underneath is usually old, patched, and full of surprises. Our crews have torn into enough Miami Gardens roofs to know what’s waiting under the gravel: rotten plywood, multiple layers of old BUR, and flashing that hasn’t been touched since the Kennedy administration.
We use OEM CertainTeed components when the situation calls for it. Starter strips, hip and ridge caps, vent boots. When a roof has to meet Miami-Dade HVHZ wind uplift ratings or keep the look of a specific shingle line, aftermarket parts don’t cut it. For older, out-of-production CertainTeed lines, we source a compatible aftermarket match only when the repair is isolated and the roof is near end of life. We explain that tradeoff honestly because Miami Gardens homeowners deserve to know exactly what they’re paying for.
Every technician who arrives at your door is background-checked, uniformed, and carrying a photo ID badge. Before they ring the bell, we send you their name and photo. No stranger at the door. No guessing. That’s the Threshold Standard, and it’s the way we’ve operated since 2000 as part of the Threshold Group family of home-service companies.
Styles & brands we work with






Common CertainTeed Roofing Problems We Solve in Miami Gardens
- Granule loss and cupping on low-slope roofs. CertainTeed shingles installed below the manufacturer’s minimum slope without proper underlayment shed granules fast in Miami Gardens. The afternoon thunderstorms pound those roofs, and once the granule layer goes, the asphalt mat underneath starts cooking in the Florida sun. We see this constantly on the low-slung concrete block ranches that make up most of Miami Gardens’ housing stock.
- Lifted starter strips and hip/ridge caps on ranch homes west of NW 27th Avenue. Where original BUR was overlaid with shingles instead of torn off, the CertainTeed caps and starter strips lift along eaves and rakes. Wind-driven rain from hurricane season finds those gaps and works its way inside. A roof shouldn’t be something you worry about, that’s our job.
- Flintlastic SA membrane blisters and seam delamination on flat roofs. When Flintlastic SA goes over old BUR with trapped moisture underneath, the membrane blisters and the seams peel apart. This is the single most common flat-roof failure we fix in Miami Gardens, and it almost always traces back to installation over multiple patch layers without a full tear-off.
- Failed pipe boots and vent flashing on 1960s homes. The original galvanized collars on Miami Gardens homes from the 1950s and 1960s were never meant to last sixty years. When they corrode, every afternoon downpour leaks straight through the penetration. We upgrade these with CertainTeed-compatible vent boots rated for HVHZ conditions.
- Secondary water barrier compliance after reroofs. Miami-Dade HVHZ code now requires a secondary water barrier on reroofs. Homes that were reroofed years ago without one often fail inspection when a new CertainTeed system goes on. We factor that into every estimate so there are no surprises when the inspector shows up.
CertainTeed Service in Miami Gardens: What Local Conditions Mean for Your Equipment
Miami Gardens has one of the highest concentrations of original built-up gravel roofs in Miami-Dade County on homes west of NW 27th Avenue. That’s not a random fact; it changes how every CertainTeed job in this city plays out. Because HVHZ code now requires a secondary water barrier on reroofs, almost every CertainTeed shingle or Flintlastic job starts with a full tear-off to bare deck. You cannot overlay a new CertainTeed system on top of two or three layers of old gravel BUR and expect it to pass inspection or hold up through hurricane season. The old gravel roof has to come off, the deck has to be inspected and repaired, and then the new CertainTeed system goes down on a clean, code-compliant surface.
Our crew tore off four layers of original built-up gravel roof on a 1963 concrete block ranch near NW 37th Avenue and 183rd Street in Miami Gardens. The CertainTeed Flintlastic SA membrane had blistered and split at a seam, letting water pool under the gravel. We removed the old BUR to the deck, replaced the rotten plywood, and installed a new CertainTeed Flintlastic SA base and cap sheet with a Landmark shingle transition at the barrel tile accents. The result passed Miami-Dade HVHZ inspection and ended years of afternoon-thunderstorm leaks.
CertainTeed Models & Products We Service in Miami Gardens
We work on the CertainTeed products you’re most likely to find on Miami Gardens roofs. CertainTeed Landmark shingles are the most common dimensional shingle we install and repair here, and they hold up well on properly pitched ranch roofs. CertainTeed XT 25 shingles show up on older homes, usually near the end of their service life. CertainTeed Grand Manor shingles are the heavy architectural line we see on larger homes near the stadium. And CertainTeed Flintlastic SA self-adhered low-slope membrane is our go-to for the flat roofs that define Miami Gardens’ housing stock.
We stock OEM CertainTeed starter strips, hip and ridge caps, and vent boots locally so Miami Gardens jobs move quickly. When an out-of-production CertainTeed line needs a repair, we source a compatible match and explain the honest repair-versus-replace tradeoff before any work starts. That’s how we’ve done business since 2000.
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AfterCertainTeed Service Pricing in Miami Gardens
CertainTeed roofing service in Miami Gardens runs on a wide range because every job starts with what’s underneath. A vent boot repair might run $300 to $600. A flat-roof patch on Flintlastic SA might run $800 to $1,800 depending on the size of the blistered area and whether we need to cut back to solid decking. A full tear-off and CertainTeed Landmark shingle reroof on a typical Miami Gardens ranch typically runs $14,000 to $24,000 depending on deck replacement, secondary water barrier scope, and flashing upgrades. Flintlastic SA full reroofs on flat roofs generally run $12,000 to $20,000.
What drives the cost in Miami Gardens is the tear-off. Multiple layers of old BUR, rotten decking, and HVHZ secondary water barrier requirements all add labor and materials. Every estimate we write includes a line-by-line breakdown before any work starts. Call (850) 753-2996 for your free estimate and we’ll walk the roof with you.
Serving Miami Gardens, FL - Our Local Coverage Area
We’re based in the Miami Gardens 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 Miami Gardens
Because the original built-up gravel roof underneath is almost always still there, and Miami-Dade HVHZ code now requires a secondary water barrier on reroofs. You cannot legally overlay new CertainTeed shingles on top of old BUR and pass inspection. The tear-off to bare deck is the only path to a code-compliant, warranty-backed roof. Call (850) 753-2996 and we’ll show you exactly what’s under your existing shingles.
No, not if you want it to last. Flintlastic SA installed over old BUR with trapped moisture will blister and delaminate at the seams, which is the exact failure we see on homes west of NW 27th Avenue. The old gravel roof has to come off, the deck has to be inspected and dried out, and then the Flintlastic SA goes down on a clean surface. Estimates are free; call (850) 753-2996.
CertainTeed Landmark shingles perform best on Miami Gardens ranch homes, provided the roof pitch meets the manufacturer’s minimum slope and proper underlayment is installed. Landmark’s dimensional construction and heavier weight handle wind uplift better than XT 25 shingles, which we mostly see on older roofs near end of life. We’ll tell you honestly which line fits your roof.
The original galvanized collars on those homes were installed sixty-plus years ago and were never designed for South Florida heat, humidity, and storm exposure. When they corrode, water comes straight through the pipe penetration during afternoon downpours. We replace them with CertainTeed-compatible vent boots rated for HVHZ conditions and seal them properly to the new underlayment.
It depends on the age of the roof, the condition of the existing underlayment, and whether the roof was ever brought up to current HVHZ code. If the roof has no secondary water barrier, patching shingles won’t fix the underlying code gap. We’ll inspect the roof and give you a straight answer on repair versus reroof. Call (850) 753-2996 for an exact quote, estimates are free.
Service Areas Near Miami Gardens
Mercer Roofing Co Miami provides CertainTeed service throughout Miami Gardens and the surrounding area. We also serve Miami Gardens service area neighbors in CertainTeed service in Miami, CertainTeed service in Fountainebleau, Doral, Tamiami, and West Little River. If you’re anywhere in northwest Miami-Dade, we’ll come walk your roof.
Book Your CertainTeed Service in Miami Gardens Today
Call (850) 753-2996 to schedule your free CertainTeed roofing estimate in Miami Gardens. We’ll send you your technician’s name and photo before they arrive, and every price is in writing before any work starts.
Written by Grant Whitlock, Owner at Mercer Roofing Co Miami, serving Miami Gardens since 2000.