CertainTeed Flashing Replacement Nationwide

CertainTeed Flashing Replacement: The Miami Owner’s Guide

We stock and install CertainTeed-compatible flashing replacement throughout Miami, with most jobs running between $350 and $900 installed depending on the length of run, roof pitch, and whether we’re replacing step flashing, chimney flashing, or pipe boot flashing. Most flashing replacements are completed same-day once we’re on the roof. The typical way a Miami homeowner discovers failed flashing: a water stain on the ceiling that appears after a heavy afternoon storm, or granules and rust streaks showing up in a gutter below a wall intersection.

Call (850) 753-2996

Flashing is the metal that lives where your roof meets something else: a wall, a chimney, a skylight, a vent pipe. CertainTeed designs their flashing systems to work with their shingle profiles, and when that metal corrodes, lifts, or separates at the seam, water gets where it shouldn’t. In Miami’s salt air and storm cycles, we replace flashing that’s rusted through, pulled loose by wind, or simply installed wrong by the previous contractor. Grant Whitlock has walked enough Miami roofs to know that flashing failure is rarely dramatic. It’s slow. And by the time you see the stain, it’s been happening for a while.

Key Takeaways:

• CertainTeed flashing replacement in Miami typically costs $350 – $900 installed
• We carry OEM CertainTeed flashing and quality aftermarket equivalents on the truck
• Same-day replacement is available for most flashing failures
• Every job gets a written price before work starts and a 365-Day Done Right Promise
• Mercer Roofing Co Miami is an independent service provider, not affiliated with CertainTeed

Which CertainTeed Models This Applies To

CertainTeed flashing isn’t a single part. It depends on what your flashing is doing and which shingle line sits above it. If you have CertainTeed XT 25, Landmark, Landmark Pro, or Presidential Shake on your Miami roof, the flashing we install has to match the exposure and profile of that shingle course. The most common compatibility issue we see: homeowners or handymen install generic step flashing that’s too short for CertainTeed’s wider exposure on Landmark Pro, leaving a gap where wind-driven rain gets behind the shingle.

To identify what you need, check the shingle wrapper in your garage or attic if you have leftover bundles. CertainTeed prints the product name on the wrapper’s barcode label. If you don’t have wrappers, we measure the shingle’s exposure and match the flashing height to the existing course. For pipe boots, there’s a size printed on the rubber collar itself, typically 1½-inch, 2-inch, or 3-inch. For chimney flashing, the metal gauge matters more than the brand. CertainTeed’s own flashing components run 26-gauge or heavier in most cases, and we’ll match that spec rather than stepping down to a thinner box-store equivalent.

We’re an independent roofing company. We install CertainTeed flashing because it’s what most Miami homes with CertainTeed roofs need, but we also stock flashing compatible with GAF and Owens Corning systems for the mixed-brand repairs we encounter on older homes.

Signs Your CertainTeed Flashing Replacement Is Failing

• Ceiling stains that darken after storms. This is the classic. Flashing at a wall-to-roof intersection has separated or corroded, and rainwater is following the gap inside. By the time the stain shows, the underlayment beneath the shingles is already wet.
• Rust trails running down the flashing itself. Miami’s salt air eats galvanized metal faster than inland climates. CertainTeed’s factory flashing is coated, but once the coating wears, rust starts. Rust means pinholes are coming, and pinholes mean leaks.
• Step flashing that’s lifted or pushed up. High wind from a summer storm gets under the shingle edge and pries the flashing upward. You’ll see it on the roofline where a wall meets a lower roof plane. If you can see daylight under the metal, it needs attention.
• Granules collecting in gutters below a wall line. That’s not always shingle wear. When flashing fails, water runs against the shingle’s underside and breaks the bond, releasing granules. The gutter tells you where the problem lives.
• A rubber pipe boot with cracks or a torn collar. Florida sun destroys rubber faster than anything. If the collar around your vent pipe looks cracked, chalky, or separated from the metal base, it’s no longer shedding water. This is the most common flashing failure we replace in Miami, and it’s usually a quick fix.

Replacement Cost & What’s Included

Here’s what CertainTeed flashing replacement costs in Miami right now:

The range depends on roof pitch (steeper costs more), how much of the existing flashing can be salvaged, and whether the decking underneath has rotted and needs repair before the new metal goes down. Every quote includes the parts, labor, disposal, and a written workmanship guarantee good for 365 days. You get the number before we start, and that number doesn’t change unless we find rotted decking that requires replacement, which we’ll show you with photos before touching it.

DIY or Call Us?

You can safely inspect your flashing from the ground with binoculars or from a ladder if you’re comfortable on one. Look for rust, lifted step flashing, and cracked pipe boots. What you shouldn’t do is walk the roof, pull up shingles, or attempt to reseal flashing with caulk from a tube. Caulk fails in South Florida’s sun and heat faster than the original problem. And walking a Miami roof after years of UV exposure means cracked tiles or loosened granule layers that make the surface slippery. Falls from roofs are a leading cause of homeowner injury, and it’s not worth it for a repair that costs a few hundred dollars.

If you found a stain or lifted metal, call us at (850) 753-2996. We’ll send a technician with a name and photo sent to your phone before arrival, and a written price before any work begins.

FAQs