Lowes Chimney Sweep Blog

Your Roofer Fixed the Roof, So Why Is the Chimney Still Leaking?

By the Lowes Chimney Sweep crew · Plano, TX

You spent good money on a new roof partly to stop that stubborn leak near the chimney — and after the next big Texas storm, there's the water stain again, right where it always was. It's maddening, and it feels like you got ripped off. But before you blame the roofer, here's what's really going on: roofing and chimney leaks are two different trades. A roofer replaces shingles and underlayment; a chimney leak almost always comes from parts of the chimney a roofer doesn't specialize in and often can't properly fix. Understanding that distinction will save you from re-roofing arguments that go nowhere and point you at what actually needs to happen to keep your ceiling dry.

Why a New Roof Rarely Stops a Chimney Leak

Shingles cover the flat field of your roof. But a chimney punches straight up through that field, and the places where water gets in are the chimney-specific details around it — the metal flashing at the joint, the concrete crown on top, the cap over the flue, and the brick and mortar themselves. Most of those aren't part of a standard reroof, and the one that is — flashing — is the very piece roofers most often rush or reuse. So it's entirely normal for a brand-new roof to sit over a chimney that still leaks exactly as before. The roof was never the leak; the chimney was.

The Four Places Your Chimney Actually Leaks

Nearly every chimney leak traces to one of these, and none is truly "roof" work:

1. Flashing. The layered metal sealing the joint where the chimney meets the roof is the single most common leak point — and the one roofers most often get wrong. A proper job means step flashing woven into the shingles plus counter flashing cut into the mortar joints. Many roofers instead smear roofing tar or caulk over the seam, which looks fine for a season and then cracks in the Texas sun. That's why our chimney flashing repair starts by tearing out the shortcut and installing real layered metal.

2. The crown. The concrete slab on top of the chimney sheds water off the masonry. When it cracks — and in North Texas most eventually do — rain pours straight down inside. A roofer doesn't touch the crown; it's crown repair work.

3. The cap. A missing or damaged cap lets rain fall directly down the flue. Simple to fix with a proper chimney cap, but not something a reroof addresses.

4. Porous brick and mortar. Old masonry soaks up water like a sponge and lets it seep through the walls. That's repointing and waterproofing — masonry work, not roofing.

The Flashing Trap Roofers Fall Into

It's worth understanding why flashing is such a repeat offender, because it's usually the answer. Roof water naturally channels against the uphill side of the chimney, so that seam takes a surprising volume of water. Done right, flashing directs all of it back onto the roof; done with caulk, it holds for a while and then fails. When a roofer reroofs, they often reuse the old flashing or seal it with sealant to save time — and since the leak doesn't show until the next hard rain, the crew is long gone before you find out. It's rarely malice; it's just that watertight chimney flashing is specialty work, and it's the piece that decides whether your chimney is dry.

Why Ignoring It Gets Expensive Fast

A chimney leak is not a "watch it and see" problem, because the water doesn't stay near the chimney. It travels into the attic, the framing, the drywall, and the insulation, and it quietly rots and stains its way through your home. What starts as a small ceiling ring becomes replaced sheetrock, mold remediation, and damaged framing — and inside the chimney, that same water rusts the damper and deteriorates the flue liner. Every storm you wait through makes the eventual repair bigger. Catching a chimney leak while it's still just a flashing or crown fix is dramatically cheaper than dealing with what it becomes.

Why This Needs a Chimney Specialist, Not Another Roof Visit

Sending the roofer back usually leads to finger-pointing and another bead of caulk. The reliable fix is to have someone who works on chimneys every day find the actual entry point. A proper chimney leak repair starts with diagnosis — inspecting the crown, flashing, cap, and masonry, and often running a controlled water test to reproduce the leak and pinpoint exactly where it comes in. Only then does a repair make sense, because sealing the wrong spot just moves the water a few feet. This is precision work, and it's the difference between fixing it once and chasing it every rainy season.

How We Find and Stop It

When we get a "still leaking after the new roof" call, we don't guess and we don't just re-caulk. We track the water to its true entry point, show you photos of exactly what's failing — the cracked crown, the tarred-over flashing, the porous brick — and give you an itemized fix so you can see what you're paying for and why. Depending on what we find, that's proper layered flashing, crown repair or sealing, a new cap, or masonry repair and waterproofing. You decide from evidence, not from a sales pitch, and the goal is simple: a chimney that's dry through the next storm and every one after it.

Why DFW Homeowners Call Lowes for Chimney Leaks

North Texas storms find every weakness, and a leak that a roofer couldn't stop is exactly what we solve. Lowes Chimney Sweep is certified, insured, and 5-star rated across the Dallas-Fort Worth metroplex, we document the real source with photos so you're never taking our word for it, and we offer same-day and Sunday service because water damage doesn't pause for the weekend. If your chimney still leaks after a new roof, call (214) 225-8874 and we'll find where the water actually gets in — and fix it for good.

Still chasing a leak after the reroof? Our chimney leak repair and flashing repair pages show how we find and stop the true source — or request your Free Online Quote below.