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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Atlas Flashing Replacement: The Houston Owner’s Guide
We stock and install flashing that matches Atlas roof systems, and a typical flashing replacement in Houston runs $450 – $1,200 installed depending on location, linear footage, and how much decking has to come off. Most jobs are done in a single visit. The way Houston homeowners usually find the problem is a ceiling stain after a hard rain, or granules collecting in a gutter and a roofer pointing at the flashing during an inspection. Flashing is the metal that bridges the seams where your roof meets a wall, chimney, skylight, or valley, and when it fails, water gets in even if the shingles themselves still look fine.
Atlas shingles are built in Texas and they hold up well to Gulf Coast sun, but the flashing around them is only as good as its original install and the sealant used. We replace flashing on Atlas roofs throughout Houston, from Meyerland to Kingwood to Cypress, and the most common call is step flashing along a sidewall that was never properly woven into the shingle courses.
Which Atlas Models This Applies To
Flashing replacement is not tied to one Atlas shingle line, but the way we match it does depend on which Atlas product is on your roof. The most common Atlas lines we see in Houston are Pinnacle Pristine, StormMaster Shake, GlassMaster, and the newer Pinnacle Sun and Pinnacle Impact. Each of these has a different profile height and exposure, and step flashing has to be cut and bent to match that profile so each shingle course locks over the metal without a gap.
If you’re not sure what Atlas line you have, check the shingle wrapper in the attic or garage, or look for a printed label on the underside of a lifted shingle near a rake edge. We can identify it on site in about five minutes. For the flashing itself, we use 26-gauge galvanized or aluminum step flashing, vent pipe boots sized to the Atlas pipe collar spec, and matching valley metal. We can install OEM Atlas accessory flashing when the job calls for it, though in most Houston repairs a quality 26-gauge aftermarket piece made to the same profile performs identically and saves you money. We’ll tell you which one makes sense for your roof and put that choice in writing before we start.
Styles & brands we work with






Signs Your Atlas Flashing Replacement Is Failing
- Staining on the ceiling or wall at a roof intersection. This is the classic first sign. Water follows the failed flashing down the framing and shows up inside, often a few feet away from where the actual leak is.
- Granules from Atlas shingles collecting in the gutter below a wall junction. Water pooling at a failed flashing point degrades the shingles above and below it faster than the rest of the roof, so granule loss concentrates right there.
- Visible rust or pitting on metal flashing at a chimney or wall. Houston’s humidity and salt air near the coast corrode galvanized flashing faster than most manufacturers’ published lifespans assume. Once rust has perforated the metal, it’s done.
- Dried, cracked, or separated sealant around a pipe boot or chimney counterflashing. Sealant has a real lifespan. When it hardens and pulls away, water runs behind the flashing even though the metal itself is intact.
- Daylight showing through the roof deck from inside the attic. On a sunny day, a gap at failed step flashing is visible from below. If you can see light at a wall-roof seam, water will follow in the next storm.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
Here’s what flashing replacement costs in the Houston market, based on what we see when we price the work. These are installed ranges, parts and labor included, with the old flashing removed and the roof made tight per the Garrison Standard.
- Single pipe boot replacement: $180 – $325
- Step flashing along one sidewall (up to 20 linear feet): $400 – $750
- Valley flashing replacement (one valley): $350 – $600
- Chimney flashing replacement, full counterflashing and reglet cut: $800 – $1,500
- Skylight flashing replacement: $450 – $900
What moves the price is access, roof pitch, how many shingle courses have to be lifted and re-set, and whether the decking underneath has rotted. In Houston we regularly find decking damage hidden behind failed step flashing, because the leak has been active through a wet season before anyone saw the ceiling stain. We show you what we find before we do anything, and the price you signed is the price you pay. Every flashing replacement from Brennan Roofing Co Houston carries our 365-Day Done Right Promise in writing, and if the repair fails within that year, we return and fix it at no charge.
DIY or Call Us?
You can safely check a few things yourself. From the ground, look for visible rust, lifted flashing, or missing pipe boots. In the attic, look for light and water stains at roof seams. But repairing step flashing means lifting shingles without cracking them, cutting and bending metal to match the Atlas profile, and re-sealing in a way that will survive Houston’s wet season. Do it wrong and you turn a $600 repair into a $4,000 decking and interior repair after the next storm. If the flashing is on a steep pitch or around a chimney, stay off the roof entirely. That’s not a do-it-yourself job on a Gulf Coast afternoon. Call Brennan Roofing Co Houston at (940) 461-8481 and we’ll send a background-checked, uniformed technician to put a written price in your hand before any work starts.
FAQs
Most flashing in Houston lasts 15 – 20 years before rust or sealant failure becomes a problem, but that number drops on coastal sides of the city and on roofs with poor drainage. Atlas shingles will typically outlast their flashing, so expect the flashing to need attention before the roof itself does.
Small gaps can sometimes be resealed, but metal that is rusted, perforated, or separated at the seam cannot be fixed with caulk and be trusted. When the metal has failed, replacement is the only repair that holds. We’ll tell you straight which situation you’ve got, and we won’t upsell replacement of a flashing that only needs a re-seal.
Most flashing replacements in Houston are done in one visit of two to five hours, depending on the location and how much shingle work is involved. A chimney with rotted decking can push it to a second day.
Our Houston trucks carry 26-gauge step and counterflashing, pipe boots in common Atlas sizes, and valley metal, so most jobs are completed without a second trip. For anything unusual, we source it same-day from local Houston supply houses. We also carry flashing-compatible materials for GAF, Owens Corning, and CertainTeed roofs.
No. The price goes on paper before anything starts, and if we find hidden damage, we stop and show it to you with a new written number before touching it. That’s the Garrison Standard, and it’s the same on every job we do in Houston.
If your Atlas flashing is leaking or you just want a straight answer about what you’re seeing, call Brennan Roofing Co Houston at (940) 461-8481. We answer with a live person, and the estimate is free.
Written by Travis Oakley, Owner, Brennan Roofing Co Houston at Brennan Roofing Co Houston, serving Houston and nearby areas.