Maple Valley, King County
In Maple Valley, a chimney waterproofing job is priced between $320 and $795. Stack dimensions and roof access account for the difference. The treatment is a breathable water repellent sprayed onto clean, repaired masonry. It stops rain from soaking in while letting vapor inside the brick escape, which a paint or a film-forming sealer does not.
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 Maple Valley home — we'll point you to the right fix.
What we do
The same crew, the same written quote — for Maple Valley 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 is a sponge with a hard face. In a climate like this one it rarely gets the chance to dry. In western Washington's wettest winter months, the Western Regional Climate Center writes, some precipitation falls on 20 to 25 days, sometimes more. Clear or partly cloudy days number just four to eight per winter month. January's relative humidity, in its figures, is roughly 87 percent in the hours before sunrise (the 4 a.m. reading) and still roughly 78 percent at the 4 p.m. reading. WeatherSpark's model for Maple Valley agrees: skies overcast or mostly cloudy about 76% of the time in December.
Every chimney waterproofing we do in Maple Valley includes:
Smoke coming back into the room, or a smell that won't go? Book the inspection first.
Book nowMaple Valley also sits a step wetter than the lakeshore. In WeatherSpark's model an average November delivers roughly 8.9 inches here, against roughly 8.0 down in Renton. Add a canopy that shades roofs for much of the day and a chimney can stay damp from October into May. Saturated brick sheds its face when it freezes, mortar softens, and moisture migrates through to stain the ceiling or wall on the inside. Summer mugginess is not the issue. Muggy days score about 0% in every month of WeatherSpark's charts, so the water that matters is cold-season rain.
A repellent cannot bridge an open crack. Crown, joints and flashing are inspected first, and anything that needs repair is quoted separately.
The masonry has to be dry and stay dry while the product cures, so we schedule around the forecast and prefer the clear months.
Dirt, moss and loose material are brushed away. Shingles, glass and landscaping below are covered.
Spraying starts low and moves upward, and continues to the point where the brick refuses more, with extra attention to the windward side.
You get dated photos and the product name, so the next application can be planned instead of guessed.
What this work is quoted at for Maple Valley homes — the exact figure comes from the $99 on-site inspection, credited toward the work.
| Service | Price in Maple Valley | 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 Maple Valley. 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.
Maple Valley is a city in the Cedar River valley, about 10 miles southeast of Renton, on the Cedar River, with homes with a median build year of 2001, about six in ten of them built in the 1990s and 2000s.
Maple ValleyKing County, WA · 47.367, -122.045
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. $320 fits a short single-flue stack on a roof we can walk. $795 fits a tall or wide chimney above a steep pitch.
Several years, not forever. Plan on having the chimney looked at every three to five years and treated again when water stops beading on the brick.
Seldom. The brick needs to be dry beforehand and for a period afterward. In Maple Valley the dependable window runs from about mid-June to early October.
Not by itself. A leak usually has a specific entry point such as flashing, a crown crack or an open joint. The $99 plus tax visit finds it, and an approved repair quote is reduced by those $99. Repellent goes on after the repair.
A $99 on-site inspection, a written quote before any work, and photos of every item we touch.
