Full Two-Piece Chimney Flashing System Repaired in One Dallas Visit

Base flashing and counter flashing repaired together in one visit. Never one without the other.

Chimney Flashing Repair in Dallas: Typical price $250 – $600

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What Chimney Flashing Repair Actually Covers

Chimney flashing is a two-piece system. Base flashing is the set of L-shaped metal pieces woven between the roof shingles at each brick course along the sides of the chimney.

Counter flashing sits above it. It is embedded into the chimney’s mortar joints and folded down over the top edge of the base flashing below. The two pieces overlap so water running down the brick lands on the counter flashing, then the base flashing, then the shingles, and never reaches the roof deck.

Both pieces work together. Neither works alone. When a Dallas homeowner calls about a leak at the roofline, the fix has to address both layers. A repair that touches one piece while the other is failing does not stop the water. That is what chimney flashing repair means here: both components, checked and fixed in one visit.

Why Dallas Roofs Get Replaced and Chimney Leaks Keep Coming

We see this pattern across Dallas constantly, and it starts with a roof replacement.

When a roofing crew replaces shingles, they usually install new base flashing along the chimney sides, roll the shingles over it and caulk around the chimney face. What they almost never address is the counter flashing above it. Counter flashing is locked into a reglet cut into the mortar joint. That is a masonry repair, not a roofing repair, so most roofing crews leave it alone.

The caulk on the old counter flashing dries out, cracks and lifts within two to four years. Water gets in at that seam, runs behind the shingles and shows up as a ceiling stain, sometimes in a room that feels nowhere near the chimney. The homeowner checks the roof and the shingles look fine, because from the roof side they are.

It is especially common in south Dallas, DeSoto, Cedar Hill and Duncanville, where shingle-only re-roofs leave the counter flashing untouched every cycle.

When the Ceiling Stain Is Not Near the Chimney

A homeowner in DeSoto had the roof replaced eighteen months before calling us. New shingles, new gutters, the works. Six months later a water stain appeared on the ceiling of the second bedroom, the one at the far end of the hall from the fireplace. The roof had been checked twice and nothing was wrong with the shingles.

Our technician found exactly what we expected. The base flashing along the chimney was brand new, installed during the re-roof. The counter flashing in the mortar joints above it was the original, and its caulk seal had cracked and separated across about fourteen inches of the upslope side.

Water was entering at that separation, running behind the new base flashing, traveling along the roof deck and pooling at a ceiling joist well away from the chimney.

We cut a fresh reglet into the mortar joint, re-embedded the counter flashing mechanically and sealed it. The staining stopped after the next rain season. The shingles were fine all along. The chimney side of the system simply was never in the re-roof scope.

Recaulk or Re-Embed? The Question That Decides the Repair

Homeowners often ask whether recaulking the visible gap is enough. The honest answer depends on what is underneath it.

If the counter flashing is still mechanically anchored in its reglet and only the caulk seal has failed, a quality sealant application restores the seal and is a valid repair.

If the counter flashing has pulled out of the mortar joint, caulk will not hold it. The gap reopens within one or two seasons of Texas heat, because the metal expands and contracts every day while the caulk does not. The right fix is to cut a clean reglet, lock the counter flashing back into the masonry and then seal it, so the seal no longer carries the load.

We check which situation you are in before quoting, and we also look at the upslope side for a missing cricket, which any chimney wider than 30 inches should have.

How Chimney Flashing Repair Works, Start to Finish

Inspect Both Layers

We start on the roof, at the chimney.

The technician checks the base flashing at every course, the counter flashing and its reglet, the caulk seal, the upslope side and cricket, and the shingles around the chimney. Inside, we look at where the stain is showing to trace the water path.

You get a clear answer, recaulk, re-embed or replace, with photos and a fixed price.

Repair Both Layers

Base flashing and counter flashing are fixed as one system, never separately.

Damaged or rusted base flashing is replaced piece by piece and woven back under the shingles. Counter flashing that has pulled away is re-seated: a clean reglet is cut into the mortar joint, the metal is bent and locked into it mechanically and then sealed. New flashing is matched to the metal already on the chimney so the materials expand at the same rate.

Where shingles were damaged around the chimney, they are replaced as part of the same repair.

Confirm the Seal

Before the crew leaves, the full chimney face and roof line are checked.

Every seam is sealed, the cricket and upslope side are checked again, and any secondary issue, such as a cracked crown, a damaged cap or open mortar near the flashing, is shown to you with photos. You get a short summary of what was found and what was fixed.

Pricing

Chimney Flashing Repair Cost in Dallas

Typical price ranges for chimney flashing repair across Dallas and the DFW Metroplex. Smaller, simpler jobs sit at the low end.

Call 972-884-5553 Book online

Service	Typical price
Flashing repair and waterproofingResealing or re-embedding existing flashing	$250 – $600
New chimney flashingBase and counter flashing replaced	$580 – $1,228
Flashing rebuild plus roof or shingle repairFlashing and the surrounding roof	$1,735 – $2,000
Chimney safety inspection (structure, cap, flashing, brick and siding)Waived when you book the repair	$79

Your exact price is confirmed on site before any work starts. The $79 safety inspection is waived when you book the repair.

FAQ

Chimney Flashing Repair Questions

How much does chimney flashing repair cost in Dallas?

Resealing or re-embedding existing flashing runs $250 to $600. New base and counter flashing runs $580 to $1,228, and a flashing rebuild with roof or shingle repair runs $1,735 to $2,000. We confirm the exact price on site.

Can I just recaulk the visible gap at the chimney face?

If the counter flashing is still mechanically anchored and only the caulk seal has failed, a quality sealant re-application is a valid repair. If the counter flashing has pulled from the mortar joint, caulk will not hold it and the gap reopens in one or two thermal cycles. An inspection determines which situation you are in before any quote is made.

My roofer just replaced the shingles. Why is water still coming in?

Roofing crews replace base flashing as part of a re-roof, but counter flashing is a masonry repair, and most roofing crews leave the existing counter flashing in place. If its caulk seal was already aging, a new roof does not fix it, and water can enter at that seam and travel along the roof deck to a ceiling far from the chimney.

What is a reglet and why does it matter?

A reglet is a channel cut into the mortar joint of the chimney. The counter flashing is bent and locked into this cut, creating a mechanical anchor rather than a surface bond. Flashing seated in a reglet moves less under thermal cycling and lasts far longer than sealant-only installations.

What is a chimney cricket and does my chimney need one?

A cricket is a peaked saddle built on the upslope side of a chimney to divert water around it instead of letting it pool against the masonry. Any chimney wider than 30 inches should have one, and many older DFW homes were built without it. We check the upslope side during every flashing inspection.

Which flashing material should be used on my chimney?

Galvanized steel, aluminum and lead-coated copper are all used. The most important factor is matching the new material to the existing system so the metals expand at the same rate. Mixing incompatible metals leads to joint stress and failure.

What happens after the flashing is repaired?

The crew walks the full chimney face and the roof-chimney junction. Any secondary issue, such as crown cracking, open mortar near the flashing or a damaged cap, is documented and shown to you before we leave.

What other services are often needed with a flashing repair?

Depending on what the inspection finds, chimney crown repair, chimney waterproofing, brick and mortar repair or a new chimney cap may also be relevant. We only recommend what the inspection actually shows.

Areas We Serve for Chimney Flashing Repair

The Chimney Inspection & Sweep serves Dallas and the full DFW Metroplex for chimney flashing repair.

We work across Dallas, Plano, Carrollton, Irving, McKinney, Frisco, Allen, Garland, Richardson, Addison, Arlington, and all surrounding communities. If you’re in the DFW area, we can get a crew to you.

Schedule Your Dallas Chimney Flashing Repair

Tell us where the water is showing up, a ceiling stain, damp in the firebox or a visible gap at the chimney face, and we will check both layers of the flashing in one visit.

Call us at 972-884-5553 or email info@theonechimneysweep.com to schedule. With 12 active crews and 24/7 availability, we can typically get to you within days, not weeks. We’ve been repairing chimney flashing across DFW since 1991. You can also book online.