Evansville Tuckpointing Cracked chimney crown or missing cap: the cheapest masonry repair to do early
The crown is the sloped slab on top of the chimney that sheds water off the masonry, and the cap is the metal cover over the flue. When the crown cracks or the cap is missing, water goes straight into the stack and works outward. Replacing the crown with a cast one that has a drip edge runs $400 to $1,200, repointing the stack is $800 to $2,500, and letting it go until the brick is spalled turns it into a $2,500 to $7,000 rebuild from the roofline. This is the highest-return small repair on an Evansville house.
Check this first (ten minutes, from the ground with a zoom)
- Photograph the top of the stack with your phone zoomed in, from two sides. You do not need to get on the roof to diagnose this.
- Look at the shape of the crown. A proper crown is a cast slab, sloped from the flue outward, projecting past the brick with a drip groove or edge underneath. A flat skim of mortar troweled level with the brick face is a mortar wash, and it always cracks.
- Find the cracks. Radial cracks from the flue, a crack all the way across, or crumbled edges mean the crown is done. Vegetation growing on the top is proof it holds water.
- Check for a cap. No metal cap over the flue means rain is going straight down the flue. Rust stains down the outside of the chimney often mean a cap that failed years ago.
- Look at the top three or four courses of brick. Spalled faces, open joints, or a course that has shifted at the top of the stack are the crown’s damage showing up.
- Check the flashing at the roof while you are at it, since the two get repaired together on the same trip. If water is showing up inside, the chimney leak page walks through which of the four entry points it is. Details are on the leaning chimney page if the stack has also moved.
What is usually wrong
| What you are seeing | Likely cause | Fix and cost |
|---|---|---|
| Thin mortar sloped flat across the top, cracked | A mortar wash instead of a real crown | Cast crown with drip edge, $400 to $1,200 |
| Radial cracks from the flue tile | Thermal movement with no bond break at the flue | Replace the crown, $400 to $1,200 |
| Crown gone at the edges, brick below spalling | Years of water off the top | Crown plus repointing, $400 to $1,200 plus $800 to $2,500 |
| No cap on the flue, rust staining, animals | Missing or failed cap | Cap replacement with the crown work |
| Top courses spalled and shifting | Saturated brick from above | Rebuild top courses, or from the roofline $2,500 to $7,000 |
| Crown fine, joints below open | Ordinary freeze-thaw on the stack | Chimney repointing, $800 to $2,500 |
| White staining down the sides of the stack | Water carrying salts out of the masonry | See the efflorescence page, plus the crown fix |
Every range is published on the pricing page, the repair is described on the chimney service page, and the chimney repair cost estimator will price your case in a minute.
Why crowns fail so fast in Evansville
A crown is a horizontal concrete surface on the highest, most exposed part of the house, and it sits directly over a stack that is warm and damp inside. Evansville then runs it through roughly 77 freeze-thaw cycles a winter, calculated from 92.6 nights a year at or below 32 degrees against only 15.5 days that stay frozen at Evansville Regional Airport, with 45.31 inches of annual rain and the wettest months in March, April, and May. Water sitting in a hairline crack on a flat surface has nowhere to drain, so every freeze widens it.
The bigger reason is how most of them were built. A mortar wash troweled flat across the brick is not a crown; it is thin, it has no reinforcement, it is bonded rigidly to the flue tile that expands and contracts every time you light a fire, and it does not project past the brick, so the water it sheds runs straight down the face of the stack. A cast crown is thicker, sloped, has a bond break at the flue, and overhangs with a drip edge so water lets go clear of the brick. It costs a few hundred dollars more and lasts several times longer.
When it is structural, not cosmetic
A cracked crown is a water problem until the brick underneath it gives up. It has become structural when the top courses have spalled or shifted, when brick is loose in the stack, when the chimney is out of plumb, or when there is damage visible in the attic where the chimney passes the roof. Then the repair moves from a crown to a rebuild from the roofline, and the honest test is how much of the brick above the roof has lost its face: past about a third, repointing is money spent on brick that will keep failing.
What to expect on the call
Send zoomed photos of the top of the chimney from two directions, a shot of the whole stack from the ground, and a shot of the flashing where it meets the roof. Expect a scope that names whether the new crown is cast with a drip edge, whether a bond break goes in at the flue, whether a cap is included, and whether the top courses need resetting first. Batch it: crown, cap, flashing check, and repointing on one visit is the efficient way to buy this against the $500 to $800 service minimum. Work runs April through November, and closing the top of a stack before the first freeze is the best-timed masonry money you can spend here.
Frequently Asked Questions
What is the difference between a chimney crown and a chimney cap?
The crown is the sloped slab across the top of the masonry that sheds water off the stack. The cap is the metal cover over the flue opening that keeps rain, animals, and debris out of the flue itself. A chimney needs both. Losing either one puts water inside the chimney, but a failed crown wets the whole stack.
What does a new chimney crown cost in Evansville?
A cast concrete crown with a drip edge that overhangs the brick runs $400 to $1,200. If the top courses of brick have already spalled, they get rebuilt first, and a full rebuild from the roofline is $2,500 to $7,000. Repointing the stack while the scaffold or ladder work is already set up runs $800 to $2,500.
Can a cracked crown just be sealed?
A hairline crack in an otherwise sound, correctly shaped crown can be sealed with a flexible crown sealant and bought a few years. A crown that is a thin mortar wash troweled flat on the brick, which is what most Evansville chimneys have, will keep cracking because it was never the right detail. That one gets replaced.
How urgent is a cracked crown?
It is the cheapest repair on the chimney and the one that prevents the expensive ones. Water entering the top of a stack soaks the brick from the inside, so it spalls and the joints wash out from within. Left long enough, a $400 to $1,200 crown becomes a $2,500 to $7,000 rebuild from the roofline.