Owens Corning Flashing Replacement Nationwide

Owens Corning Flashing Replacement: The Dallas Owner’s Guide

We stock and install Owens Corning-compatible flashing replacement across Dallas, with most complete flashing jobs running $350 – $900 installed depending on chimney, wall, or valley scope. We carry OEM-grade Owens Corning flashing and quality equivalents on our trucks, so most repairs happen in a single visit. The way homeowners usually find us: a brown water stain on the ceiling after a Dallas thunderstorm, or granules washing down the gutter, or a chimney flashing that’s clearly peeling away from the brick.

Call (432) 302-5605

Flashing is the metal skin that bridges the joints where your roof meets something vertical, like a chimney, a wall, a vent pipe, or a valley where two roof planes meet. Owens Corning flashing systems are built to match their shingle profiles, and when the flashing fails, water gets in. Not every leak is a flashing failure, but in our experience across Dallas, it’s the single most common source of preventable roof leaks we see. This page covers what fails, what it costs, and how we fix it.

Which Owens Corning Models This Applies To

Owens Corning flashing is not a one-size-fits-all part. The profile, bend, and gauge vary depending on whether it’s step flashing under Duration shingles, chimney flashing over an Owens Corning StormGuard underlayment, or vent pipe flashing matched to a specific pipe diameter. We work with the full Owens Corning architectural line you’re likely to have on a Dallas roof: Oakridge, Duration, Duration Premium, and Berkshire. The flashing we install is either Owens Corning OEM or a manufacturer-equivalent gauge and finish matched to your shingle exposure and color.

Here’s the compatibility gotcha most Dallas homeowners don’t know: flashing failure is often not the metal itself. It’s the sealant bond between the flashing and the shingle or brick that dries out from Texas UV exposure. The flashing could look fine from the ground and be leaking at the step joint. When we arrive, we check the flashing gauge, the step pattern, and the sealant compatibility. Owens Corning shingles in Dallas see extreme heat cycling, and we size the replacement to match your specific roofline, not just the part number that came off. Putting a generic thin-gauge flashing on a heavy OC shingle line is a repeat-leak waiting to happen.

Independent note: Mercer Roofing Co Dallas is an independent roofing contractor. We install and repair Owens Corning products, but we’re not affiliated with Owens Corning. That independence is why we can be straight about whether your flashing actually needs full replacement or just a proper re-seal.

Signs Your Owens Corning Flashing Replacement Is Failing

• Water staining on ceilings or walls after heavy rain. When flashing fails at a chimney or wall junction, water follows the roof slope inward and shows up as a brown patch, often a few feet from the actual leak point. In Dallas, the first clue is often a ceiling stain that appears the day after a March or May storm.
• Curling, cracked, or missing sealant at flashing edges. The asphalt-based or polyurethane sealant that bonds flashing to shingles and brick breaks down under Texas sun. Once the sealant dries out and cracks, water wicks behind the flashing on every rain event.
• Visible rust or corrosion on the flashing surface. Galvanized and aluminum flashing have different lifespans in Dallas humidity. Rust means the protective coating is gone, and pinhole leaks are close behind.
• Lifted nails or popped fasteners along the flashing run. Thermal expansion and contraction in North Texas summers and winters will work nails loose. A popped nail at a flashing seam gives water a direct path under the shingle.
• Granules from Owens Corning shingles collecting in gutters near flashing. When flashing fails and water gets under shingles, the shingle edges erode faster than the rest of the roof. Granule loss concentrated at a chimney or wall means water has been moving where it shouldn’t.

Replacement Cost & What’s Included

In Dallas, expect to pay $350 – $900 for a complete Owens Corning flashing replacement. A simple vent pipe flashing re-seal or replacement runs $350 – $500. Step flashing along a wall or dormer typically lands at $500 – $750. Full chimney flashing with counter-flashing cut into mortar runs $650 – $900, and valley flashing replacement is usually $550 – $800 depending on valley length and whether shingles need to be lifted and re-seated.

Every quote we give is a written price before any work starts. That price includes the flashing material, sealant, labor, and disposal of the old flashing. You’ll know the number up front, and the invoice matches the quote. Every flashing replacement we do is covered by our written workmanship guarantee for 365 days. If the flashing leaks again within the year, we come back and fix it at no charge.

DIY or Call Us?

Flashing replacement sits on the roof, often at an edge or against a chimney, and it involves lifting shingles, cutting metal, and applying sealant that has to bond correctly or it leaks. That’s not a ladder job for a weekend. What an owner can safely check from the ground or a window: visible rust, lifted flashing corners, cracked sealant edges, and granule accumulation in gutters. What you should not do is climb onto a steep Dallas roof with a tube of caulk and a putty knife, especially on a two-story home.

The most common DIY mistake we see in Dallas is the homeowner who smears sealant over old flashing as a “temporary fix.” It fails, traps water behind the sealant, and the leak is worse in six months than it was at the start. If you’re seeing signs of flashing failure, call us at (432) 302-5605. We’ll come out, look at it, and tell you honestly whether it’s a re-seal or a full replacement. You won’t wonder.

FAQs