Home › Service Areas › Renton › Chimney Crown Rebuild
Chimney Crown Rebuild in Renton, WA
Cracked crown on a Renton rambler chimney? Rebuilt with slope, overhang and a drip edge, starting at $299. We are based in downtown Renton.
- Serving Renton & King County
- Free 2nd-opinion quotes
- Price match + 10–25% discount
Free Chimney Crown Rebuild Quote in Renton
We'll confirm a time by phone or text.
Crown rebuilds in Renton are a 1950s-70s rambler job. The brick chimneys on those houses in the Highlands, Kennydale and around downtown were mostly finished with a thin mortar wash troweled flush to the brick edge, with no overhang and no bond break at the flue tile. After five to seven decades, that wash has typically cracked across, separated from the tile, and started feeding water into the top few courses. The telltale signs from the ground are white efflorescence streaks below the top, brick faces flaking off, and a top course that looks loose or tilted.
We rebuild rather than patch: remove the failed wash and any loose top brick, reset what needs resetting, then form and pour a new crown that is thick at the center, slopes to the edges, overhangs the brick with a drip edge, and has an expansion gap around the flue tile. Crown rebuilds start at $299; the quote is free and is set after we see the chimney, since size and how many top courses need resetting change the price. With our office at 1202 N 10th Pl Unit 1509 in Renton, we can quote most Renton crowns the same day and pour on the next dry day. If you have another bid, we price match and take 10-25% off.
Symptoms
Signs Renton homeowners notice
- Pieces of concrete or mortar missing from the top edge of the chimney
- Cracks wide enough to see daylight or fit a coin into
- The crown is flat or dished in the middle so water pools on it
- No overhang: the slab ends flush with the brick faces
- The top two or three courses of brick are spalling or loose
- A previous crown sealant is peeling off and the cracks underneath have reopened
Renton Conditions
Why this happens in Renton
The crown is the one flat, horizontal surface on a Renton chimney, and it catches everything the weather sends. The Sea-Tac 1991-2020 normal is 40.34 inches of rain a year, with the October-through-March wet season carrying about 29.65 inches of it. Unlike the roof, a flush mortar wash holds water instead of shedding it. Winter lows average 37.1F in December and 37.7F in January and February, and the region sees about 60 days a year that touch 32F but only about 4 that stay frozen all day, so water in a crown crack freezes and thaws repeatedly each winter. The Brick Industry Association describes exactly that process: saturated masonry that freezes expands and, under repeated cycles, cracks, spalls and disintegrates.
Renton's older core has been through roughly 50-70 of those winters, which is why we typically find the crown, not the brick below it, to be the first thing that fails on a Highlands chimney. The 1990s-2010s prefab chases in Fairwood and Benson do not have crowns; those use a chase cover.
How It Works
Our chimney crown rebuild process
Remove the failed crown
We break out the old slab or mortar wash down to solid brick, protecting the flue opening so debris does not fall into the chimney.
Repair the top courses
Any loose or spalled brick in the top courses is reset or replaced so the new crown sits on sound masonry.
Form with overhang and slope
We build a form that projects past the brick faces on all sides and slopes the surface away from the flue so water runs off instead of sitting.
Pour and finish
The crown is poured in a single placement with a bond break around the flue tile so heat expansion does not crack it, and a drip edge is formed on the underside of the overhang.
Cure and seal
Once cured, we apply a breathable water repellent and, where useful, a flexible sealant at the flue joint. A new cap goes on if the old one is damaged.
Full details, options and pricing factors on the main Chimney Crown Rebuild page.
Need chimney crown rebuild in Renton?
Call now or request a free quote — we confirm by phone or text.
☎ 206-453-2045 Request a QuoteQuestions
Chimney Crown Rebuild in Renton — FAQ
Can I have the crown sealed instead of rebuilt on my Renton chimney?
If the crown is a real poured crown with only shallow surface cracks, a flexible sealant coat can extend its life and we will tell you that at the free quote. A thin 1960s mortar wash that is cracked through and lifting off the brick cannot be sealed back into shape; it needs a rebuild, starting at $299.
What weather do you need to pour a new crown in Renton?
A dry surface and a dry window for it to set, which in Renton is easiest April through September. We do winter crowns on dry days too, since our office is in town and we can move quickly when a break in the rain shows up. Until then, a temporary cover keeps water out of the open top.
How soon can you do chimney crown rebuild in Renton?
We confirm a time by phone or text after you request a quote; same-day service is often available for urgent problems in Renton and the rest of King County.
Other services in Renton
Chimney Crown Rebuild nearby