Freeze-Thaw Widens Every Crack
Water sits in a hairline crack, freezes overnight and expands. Repeat that through a Missouri winter and a cosmetic line becomes an open channel into the chimney.
Licensed & Insured 5-Star Rated Stop Water at the Top
Chimney Crown Repair in St. Louis, MO — Fix the Roof of Your Chimney.
Crowns rebuilt for St. Louis freeze-thaw winters and storm season. A cracked crown lets water into the entire chimney. We inspect from the roof, tell you honestly whether it needs sealing or rebuilding, and price it in writing.
- Roof-Level Inspection
- Seal or Rebuild — Honestly
- Written Price Before Work
- 10% Hero Discount
Request Service
Get Your Free Chimney Estimate
Fill in your details and we'll get back to you about your chimney — wherever you're located in our service areas.
Crown rebuilds & repairs
Flexible crown sealing
Masonry waterproofing
Photos of finished work
Local Expertise
Crown Repair Built for St. Louis Conditions
The crown is the concrete slab across the top of the chimney, and on a century-old St. Louis brick stack it is usually the first thing to go. Many city chimneys never got a real crown at all — just a thin mortar wash troweled flush with the brick, with no slope and no overhang. It cracks, water runs straight down into the masonry, and a few Missouri winters later the joints below are washed out too.
We rebuild crowns the right way: reinforced, sloped to shed water, with an expansion joint around the flue tile and a drip edge that throws rainwater clear of the brick instead of down its face. On homes in Soulard, Tower Grove, Kirkwood, Webster Groves and out into St. Charles County, fixing the crown is usually what stops a leak that everyone else blamed on the roof.
Warning Signs
Why St. Louis Crowns Fail
Crown damage is invisible from the ground and expensive once it reaches the inside of the house. These are the signs worth acting on now.
Thin Mortar Washes, Not Real Crowns
Historic St. Louis chimneys commonly have a sand-mortar wash instead of a reinforced crown. Patching it buys a season; rebuilding it solves the problem.
Storm Damage and Standing Water
Spring storms crack and chip crown edges, and a crown with no slope holds water instead of shedding it — the fastest way to soak the flue and the brick below.
Crown inspections booked this week
Water Always Starts at the Top
Send us what you're seeing — cracks, stains, flaking brick. We'll look from the roof, photograph it, and tell you honestly whether it needs sealing or rebuilding.
Prefer to send details?
Share what you're seeing and we'll contact you to confirm the right next step.
Send My Chimney DetailsFree written estimates · No obligation
What We Do
Repairs That Shed Water Instead of Hiding It
Full Crown Rebuild
The failed crown is removed and replaced with a reinforced, properly sloped concrete crown that extends past the brick with a drip edge — built to last decades, not seasons.
Crown Sealing & Coating
Where the crown is structurally sound but showing hairline cracks, a flexible waterproof coating bridges the cracks and buys many years without an unnecessary rebuild.
Expansion Joint at the Flue
Concrete and clay flue tile expand at different rates. We install flexible joint material at that seam so the crown does not crack open where it meets the flue.
Masonry Waterproofing
Once water has been soaking the brick, we apply a breathable masonry sealer that keeps water out while letting trapped moisture escape — never a film-forming paint that traps it.
How It Works
From Cracked Crown to Sealed Chimney
1. Tell Us What You See
Cracks on top, white staining, flaking brick, a leak near the chimney — describe it and we book a roof-level look.
2. Inspect the Crown
We check the crown, the slope, the overhang, the flue joint and the brick underneath, and photograph all of it so you see what we see.
3. Seal or Rebuild — Honestly
Sound crown with hairline cracks gets sealed. Failed crown gets rebuilt. You get the recommendation and the written price before any work.
4. Do the Work Right
Reinforced concrete, correct slope, real overhang with a drip edge, flexible joint at the flue. The details are what make a crown last.
5. Photo Confirmation
Finished photos from the roof so you can see exactly what was built, without climbing a ladder yourself.
Sealing vs. Rebuilding — The Honest Version
Not every cracked crown needs to be torn off. A structurally sound crown with hairline cracks can be coated with a flexible waterproof membrane that bridges the cracks and lasts years. That is a real repair, not a shortcut — and it costs a fraction of a rebuild.
What cannot be coated: a crown with wide structural cracks, missing sections, no slope or no overhang. Sealing those hides the problem for one season and the water keeps coming. We tell you which one you have and show you the photos that prove it.
5-Star Rated
What Homeowners Say About Us
5.0 average rating
Serving St. Louis, Missouri and the surrounding area
“Water was coming in around our chimney every time it rained. Captain found the cracked crown and bad flashing, explained everything clearly, and fixed it in one visit. Not a drop since.”
Michael R.
Chimney Leak Repair · San Antonio, TX · 2 weeks ago
“Very professional from start to finish. The inspection was thorough, they showed me photos of everything, and the cleaning was spotless — no mess left behind. Fair price too.”
Sarah K.
Chimney Inspection & Cleaning · Austin, TX · 1 month ago
“Our 90-year-old brick chimney was crumbling. The tuckpointing work is beautiful — it looks brand new but still matches the house perfectly. True craftsmen.”
David & Anna T.
Tuckpointing & Masonry Repair · Houston, TX · 1 month ago
Crown FAQs
Answers Before You Approve a Rebuild
Got a quote from someone else and not sure it's the right work? Call and describe it — we'll tell you straight.
(682) 217-3577The crown is the concrete slab across the top of a masonry chimney that seals the space between the flue tile and the outer brick. It is the chimney's roof — its job is to shed rainwater away from the masonry.
It depends on the size of the chimney and whether the crown can be sealed, partially repaired or needs a full rebuild. We inspect from the roof and give one written price before work begins — never a phone guess.
Hairline cracks in an otherwise sound crown can be sealed with a flexible crown coating, and that is a legitimate long-term repair. Wide cracks, missing sections, or a crown with no slope or overhang need rebuilding.
Water enters the chimney at the top and works down: saturated brick, spalling masonry, a rusted damper, a damaged liner and eventually ceiling stains inside the house. Crown repair is far cheaper than the damage that follows it.
Most crown rebuilds are a one-day job, plus curing time before the chimney should be exposed to heavy rain. We schedule around the weather forecast.
The crown is the concrete slab across the whole top of the chimney. The cap is the metal cover over the flue opening itself. Most chimneys need both, and a failure in either lets water in.
Yes — 10% off for military, veterans, seniors 65+, police, firefighters and EMTs. Mention it when you call (682) 217-3577.
Spring through fall, when temperatures stay above freezing long enough for the material to cure. If a crown is badly broken in midwinter we can apply a sealed temporary repair and rebuild it once the weather allows.
Hairline cracks in an otherwise sound crown can be sealed with a flexible crown coating. A crown with wide cracks, missing chunks, or no slope and overhang needs a rebuild — coating that only hides it.
Stop the Water Before It Reaches Your Ceiling
One roof-level look, honest photos, and a written price. Call now and we'll get you on the schedule.