Renton, King County
Crown work and repointing on a Renton chimney start at $425. That covers a crown with hairline cracks sealed and resurfaced, or a modest area of joints raked and repacked. A crown too far gone to save is broken out and cast again, and a stack with soft mortar on all four faces takes days, not hours. Square footage and scaffold needs are what the written quote is built on.
Typical investment
From $425
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Book your $99 inspection
$99 plus tax, deducted when you approve the repair
Not sure where to start
Pick what you're seeing at your Renton home — we'll point you to the right fix.
What we do
The same crew, the same written quote — for Renton homes.
Level 1 review of the accessible parts, stepped up to a Level 2 camera pass when those parts cannot settle the question
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The flue brushed along its full height with heads chosen for its shape and material
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An assessment in photos that tells weathering apart from structural failure
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Video scan and measurement of the flue before a liner is specified
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Each flue measured, or the whole crown when one cap will cover several flues
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Burner, pilot assembly and igniter cleaned and tested
Learn moreRanges shown for orientation — the exact figure is written up on-site, after the inspection.
Brick has history in this town. HistoryLink lists brick, briquette and tile plants among Renton's industries a century ago, fed by clay from the surrounding hills. No record says which chimneys used that local brick, but older stacks here vary widely in hardness. Soft brick behind a hard modern mortar patch is a pairing that fails in a recognizable way: the patch stays intact while the brick around it crumbles.
HistoryLink's account of Renton names areas the city absorbed as it grew, Kennydale, Talbot Hill and Earlington among them. Census estimates show how much of the resulting housing is of an age for masonry trouble, with 5,320 units from the 1960s alone.
Mortar from that period has usually outlasted its design life at the top of the stack, where it gets no shelter. When an insert and liner were added later, the crown was often cut or patched around the new pipe, and that patch is a common leak. Repointing and a properly formed crown protect the liner investment underneath as much as the brick.
Every masonry repair (crown / repointing) we do in Renton includes:
Smoke coming back into the room, or a smell that won't go? Book the inspection first.
Book nowWeatherSpark dates Renton's cool season November 13 to February 28 ; its December low averages 37°F. The city's hazard plan adds that freezing spells of several days are not unusual in winter even though deep freezes in the 20s are rare. That is the worst pattern for wet masonry. Joints thaw by afternoon, take on more rain, and freeze again overnight.
Tapping and probing show which joints and bricks are loose, beyond what the eye catches.
Joints are ground to a set depth and failed brick is cut out without disturbing its neighbors.
Mortar goes in by layers and is struck to match the old joint profile. A recast crown gets its pitch and its overhanging lip from the formwork.
Tarps keep showers off the new mortar until it has set. Photos follow.
Much of Renton's historic downtown consists of unreinforced masonry buildings, the city's hazard plan says, and a great deal of its commercial district stands on soils with high liquefaction risk. It adds that many homes predate seismic codes, and a chimney from before those codes is usually plain brick and mortar with no steel.
In such a stack, the joints are the only thing resisting a sideways shove. Washington DNR's fifty-year odds for the region: 17 percent for a shallow crustal quake at 6.5 or stronger, 15 percent for a magnitude 9 subduction event. Repointing does not make an old chimney earthquake-proof. It does restore the bond that eroded joints have lost.
What this work is quoted at for Renton homes — the exact figure comes from the $99 on-site inspection, credited toward the work.
| Service | Price in Renton | What that covers |
|---|---|---|
| Masonry Repair (Crown / Repointing) | From $425 | Crown work, repointing and tuckpointing by surface area |
| Chimney Sweep | $189–$459 | Full flue swept, Level 1 inspection included |
| Chimney Inspection | $99 plus tax | Level 1 visual; Level 2 adds a full camera scan |
| Chimney Relining | From $1,900 | Full-length stainless liner, sized to the appliance |
| Chimney Repair | From $375 | Masonry repair — brick and mortar, scoped after diagnosis |
Ranges are what these jobs are quoted at in Renton. The exact figure is set on site after a $99 inspection (credited toward the job if you go ahead), and you approve it before any work starts.
Washington's residential code describes the top of a masonry chimney in section R1003.9.1. The cap, which may be concrete, metal or stone, has to slope so water runs off, carry a drip edge, and be separated from any flue liner by a caulked bond break made to ASTM C1283.
The crowns we replace are often just a thin wash of surplus mortar, dead flat, with none of those features. When we recast one, the slope, the overhang and the flexible joint around the tile are part of the form, and the same 2021 code edition that King County applies to complete applications filed since March 15, 2024 is the reference we build to.
Renton is a city of 24 square miles at the south end of Lake Washington, incorporated in 1901, on Lake Washington, with homes with a median build year of 1988, more than a third of them built from the 1940s through the 1970s. We work every part of it — the Highlands, Kennydale, Benson Hill, Talbot Hill, Earlington, North Renton included.
RentonKing County, WA · 47.483, -122.217
Before and after
Illustrations of what each repair changes on a typical chimney — not photos of a specific job.
Before
After
Before
After
Before
After
Four steps, each one on paper — so you always know what happens next.
Choose a genuine opening on the crew's calendar. Confirmation is immediate.
Liner, crown, cap, flashing and masonry examined in order — each finding photographed.
One document, plain numbers, covering only the work your chimney genuinely needs.
The repair is completed, then handed over with before-and-after photos of every item.
From $425. Sealing a cracked crown is the small end; recasting a crown or repointing an entire stack is priced by area and access. Every quote is itemized.
Yes, with tenting. Mortar needs to be kept dry and above freezing while it cures, so we cover the work and watch the forecast. Some crown pours are better scheduled for a dry stretch.
It is the first visit, $99 plus tax. If the masonry quote is accepted, that fee is deducted from the job.
A $99 on-site inspection, a written quote before any work, and photos of every item we touch.
