Quick AnswerA crown rebuild means removing the existing concrete cap down to the brick and pouring an entirely new one with a two-inch overhang past the flue and a slope of roughly 1/4 inch per foot, so rain and snowmelt run off instead of pooling. It's the right fix when the crown is cracked through, has failed patch repairs already on it, or was poured flat with no overhang to begin with, a common shortcut on older Cleveland homes. Most single-flue jobs are done in a day. You'll get a written, flat-fee estimate before we mix a single bag of concrete.
What’s Included
A crown rebuild is a full replacement, not a patch. We're not skimming a repair coat over cracks and hoping it holds through another freeze-thaw cycle — we're removing the existing concrete down to the brick and building a new crown correctly from the ground up, with the slope and overhang it should have had the first time.
- Complete demolition and removal of the existing crown, including any old patch material or caulk that's trapping moisture against the brick underneath.
- A new reinforced concrete pour formed to the correct slope, at least 1/4 inch of drop per foot, so water actively runs off the crown instead of sitting and refreezing.
- A minimum two-inch overhang beyond the chimney's brick face on all sides, with a drip edge cut underneath so runoff kicks away from the masonry rather than washing down it.
- Flashing inspection and repair where the crown meets the roofline, since a new crown won't stop leaks caused by failed step or counter flashing nearby.
- A flexible, waterproof crown sealant applied after cure to bridge the hairline shrinkage cracks that are normal in any new concrete pour.
- Flue liner and rain cap check while the top of the chimney is already exposed, so we can flag any other issues before we button things back up.
Signs You Need This
- Visible cracks running across the top of the chimney, especially near the flue opening
- Water stains or damp brick on the upper courses of the chimney, inside or out
- A crown that sits flush with the brick with no overhang or drip edge
- Crumbling or spalling concrete you can flake off by hand
- Previous crown patch or sealant repairs that have already failed
Our Process
Inspect and diagnose
We get on the roof and check the crown's condition up close, along with the flashing and flue, so the estimate reflects what's actually happening up there, not a guess from the ground.
Remove the old crown
We demolish and haul away the existing concrete down to the brick, so the new pour bonds to a clean, solid surface instead of sitting on top of old cracks.
Form and pour
We build formwork for the correct overhang and slope, reinforce the pour, and finish the concrete so water is directed off the chimney from day one.
Seal and inspect
Once cured, we apply a flexible waterproof sealant and do a final check of the flashing and cap before we call the job done.
How Much Does It Cost?
Crown rebuilds are priced by the size of the chimney, roof access, and how much of the existing structure needs to be removed before we pour, so we'll give you a flat-fee written estimate on site rather than a number over the phone. Because it's a full replacement rather than a patch, it costs more upfront than a crown repair, but it also isn't something you'll be paying to redo again in two or three winters. There are no surprise add-on charges once the estimate is signed; if we find something else while we're up there, like failed flashing, we'll show it to you and quote it separately before touching it. Most homeowners find this is the last chimney-top repair they need for a long time.
FAQs
A repair patches or resurfaces an existing crown that's still structurally sound, usually to seal minor cracks. A rebuild removes the entire crown and pours a new one, which is what's needed once the concrete is cracked through, delaminating, or was never built with proper slope and overhang.
Most single-flue chimneys are done in a single day, including demolition, forming, and the pour. Larger chimneys or multi-flue setups can take longer, and the concrete needs time to cure before we apply the final sealant.
Yes. We form the crown to your chimney's exact dimensions and finish it to sit correctly against the existing brick, with the overhang and drip edge built in so it functions and looks like it belongs there.