Sammamish, King County
Brick and mortar are porous. They take water in during a storm and give it back when the weather clears, and in Sammamish the weather does not clear for long. A breathable repellent changes that balance: rain beads and runs off, and the brick can still release vapor outward. We apply it for $285 to $790, with the price set by the stack's dimensions and the cleaning required beforehand.
Typical investment
$285–$790
Book an inspection
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 Sammamish home — we'll point you to the right fix.
What we do
The same crew, the same written quote — for Sammamish homes.
A Level 1 check, or a Level 2 with a camera run through the flue when the visible parts are not enough
Learn more
Brushing of the whole flue, top to firebox, with brush heads sized to the liner
Learn more
A photographed assessment that separates cosmetic wear from structural damage
Learn more
A camera run and full measurements before any liner is ordered
Learn more
Measurement of each flue, or of the full crown for a multi-flue cap
Learn more
Cleaning and testing of the burner, the pilot assembly and the ignition
Learn moreRanges shown for orientation — the exact figure is written up on-site, after the inspection.
WeatherSpark's record for Sammamish shows why drying time is the scarce resource. On any given day between October 8 and May 8 the chance of a wet day is above 35%. December skies are overcast or mostly cloudy about three quarters of the time. The Western Regional Climate Center tallies winter in western Washington at a mere four to eight days per month that rate as clear or partly cloudy, and that January humidity in the interior valleys runs near 87 percent before dawn. Brick soaked in November can stay damp inside well into spring.
WSU Extension's demossing manual blames two things for moss: the cool, damp climate of the Pacific Northwest, and any surface that goes a long time without drying. A shaded Sammamish chimney is exactly that. Repellent sprayed over living moss never reaches the brick, so cleaning is half the job.
How it is cleaned matters. Oregon State's extension service has two cautions: a pressure washer used carelessly harms shingles, and zinc sulfate products are wrong wherever the gutters, downspouts or flashing are made of copper. We work by hand and at low pressure, and we check what metal is on the roof before any treatment product is opened.
Every chimney waterproofing we do in Sammamish includes:
Smoke coming back into the room, or a smell that won't go? Book the inspection first.
Book nowWater inside brick causes trouble in stages. First come white salt deposits on the face. Then joints soften and moss takes hold on the shaded side. Finally bricks lose their faces after cold nights. Repellent does not fix damage that has already happened, and it must never be a film-forming sealer, which traps moisture behind it. So the order matters: repair cracks and joints, clean the surface, let it dry, then treat.
We look for cracks, open joints and crown defects. Anything that lets bulk water in is repaired before treatment.
Growth and soot staining come off so the repellent can reach the pores of the masonry.
Application is booked for a dry spell; treating wet brick wastes the product.
The repellent is sprayed from the bottom up until the surface stops absorbing, and the date goes on your invoice.
The dry weeks that suit waterproofing are the same weeks when fire is on people's minds. Sammamish's hazard annex says wildfire risk west of the Cascades has been low historically and is rising with drought and stressed trees. In 2026 a statewide burn ban ran from August 1 through September 30.
Two practical consequences follow. We do the treatment visit and a cap-screen check together, so the chimney goes into autumn both sealed against rain and screened against sparks. And since smoke tends to arrive in the hot, dry part of summer, as the Puget Sound Clean Air Agency notes, we move an appointment when the air is bad enough that working on a roof makes no sense.
What this work is quoted at for Sammamish homes — the exact figure comes from the $99 on-site inspection, credited toward the work.
| Service | Price in Sammamish | What that covers |
|---|---|---|
| Chimney Waterproofing | $285–$790 | Breathable sealer — reapplied every 3–5 years in this climate |
| Chimney Sweep | $189–$449 | 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 $425 | Masonry repair — brick and mortar, scoped after diagnosis |
Ranges are what these jobs are quoted at in Sammamish. 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.
Sammamish is a 24-square-mile plateau city, roughly 500 feet up, on Lake Sammamish, with homes with a median build year of 1994, more than half of them built in the 1980s and 1990s. We work every part of it — Sunny Hills, Sahalee, Klahanie included.
SammamishKing County, WA · 47.616, -122.036
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.
$285 to $790. A short single-flue stack with clean brick is near $285. A tall or wide chimney, or one that needs moss removed first, is higher. Repairs, if any are needed, are quoted separately.
Plan on a fresh coat at intervals of three to five years. Faces that take the southerly rain wear soonest, and we check them at each yearly visit.
In the clearer part of the year, which WeatherSpark places from about June 16 to October 7 here. July is the driest month, averaging under an inch of rain.
A $99 on-site inspection, a written quote before any work, and photos of every item we touch.
