Renton, King County
Treating a Renton chimney with water repellent is a $320 to $795 job. $320 is a squat one-flue chimney we can reach on foot from the roof deck. Tall chimneys, wide ones serving two fireplaces, and roofs that call for staging push toward $795. The product we spray is vapor-permeable: liquid water is turned away at the surface, and vapor already in the masonry keeps its way out.
Typical investment
$320–$795
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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.
Thirty-eight inches of rain fall on Renton in a year by the city hazard plan's figure, about 6 of them in each month from November through January. What wears on brick is less the total than the lack of drying time in between. The Western Regional Climate Center's tally for a winter month on the wet side of the Cascades: as few as four, at most eight days of clear or partly clouded sky. A chimney on Talbot Hill can stay damp from Halloween to Easter.
Close to four in ten Renton housing units were standing before 1980, and about one in seven before 1960, by American Community Survey estimates. HistoryLink traces a good part of the earliest of that stock to the war, when the town swelled to 16,000 people and housing went up fast.
Brick that has faced several decades of rain has a rougher, more open surface than the day it was laid, and it takes in water faster. Where an old fireplace has since been fitted with an insert, the flue also runs cooler than it did with an open fire, so the stack gets less help drying from the inside. Both are reasons a repellent does more for a 1950s chimney than for a recent one.
Every chimney waterproofing we do in Renton includes:
Smoke coming back into the room, or a smell that won't go? Book the inspection first.
Book nowWet brick shows itself in stages. First comes a white powder on the face, minerals carried out by evaporating water. Then the mortar softens and green appears where the sun does not reach. Moss on roofs is, in the words of OSU's Extension service, inevitable in this moist corner of the country, and it works by trapping debris and keeping the surface under it wet. Indoors the late sign is a brown stain on the ceiling beside the chimney breast.
Crown, joints and roofline metal are checked; a real leak is repaired before any spray goes on.
Growth and dirt are removed, then the brick is given time to dry so the product can soak in.
Repellent is applied from the bottom up until the masonry stops absorbing it.
Once cured, a splash should bead and run off instead of darkening the brick.
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 |
|---|---|---|
| Chimney Waterproofing | $320–$795 | Breathable sealer — reapplied every 3–5 years in this climate |
| 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.
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.
Between $320 and $795 depending on the stack's height, its width and how we have to reach it. You get the exact figure in writing after the chimney has been seen.
The brick has to be dry. WeatherSpark puts the clearer part of Renton's year from around June 15 to about October 8, and those sixteen weeks are when most treatments are scheduled. A dry spell in spring can work too.
Yes, the $99 plus tax inspection. It tells us whether the chimney needs repair before it can be treated, and the fee is deducted when you approve the quote.
A $99 on-site inspection, a written quote before any work, and photos of every item we touch.
