Issaquah, King County
Chimney waterproofing in Issaquah costs $285–$795. We apply a breathable, vapor-permeable water repellent to the brick and mortar, which sheds rain from the outside while letting moisture already in the masonry escape. The spread in price follows the size of the stack and how much prep it needs.
Typical investment
$285–$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 Issaquah home — we'll point you to the right fix.
What we do
The same crew, the same written quote — for Issaquah homes.
Level 1 or Level 2 inspection, with a camera scan where warranted
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Complete sweep of the flue and firebox, protected by drop cloths and HEPA filtration
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Restoration of brick, mortar joints and firebox
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A stainless-steel or ceramic liner run the full height of the flue
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A stainless cap fitted to your flue's exact dimensions
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Cleaning of the burner, pilot and valve assembly
Learn moreRanges shown for orientation — the exact figure is written up on-site, after the inspection.
Brick behaves like a hard sponge. Left untreated, a chimney in a rainy climate absorbs water with every storm, and that water carries through to the flue, the attic framing and the interior wall. A good repellent changes how much the masonry takes in without sealing it shut, which is why the product type matters as much as the application.
Every chimney waterproofing we do in Issaquah includes:
Smoke coming back into the room, or a smell that won't go? Book the inspection first.
Book nowThe mistake we undo most often around Issaquah is a glossy sealer or paint brushed onto the brick at some point in the past. It traps moisture behind the surface, and the face of the brick flakes off. Waterproofing only works on clean, sound masonry with repaired joints, so we check that first and tell you if repairs have to come before the treatment.
Repellent does not fix broken joints or a cracked crown. We confirm the stack is sound, or quote the repairs it needs before any coating goes on.
Dirt, moss and old residue come off so the product can soak in. Treatment waits for dry masonry, which is why summer is the best time to book.
We saturate the brick and mortar with a breathable product, covering every face of the stack above the roofline.
A water test on a treated face shows beads running off rather than soaking in, and we photograph the result for you.
What this work is quoted at for Issaquah homes — the exact figure comes from the $99 on-site inspection, credited toward the work.
| Service | Price in Issaquah | What that covers |
|---|---|---|
| Chimney Waterproofing | $285–$795 | 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 $1,895 | 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 Issaquah. 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.
Monthly rainfall figures for Issaquah run higher than for Bellevue, with the peak in November and the low point in July. Across western Washington, the climate record describes a wet season opening in October and cresting in winter, when December and January often see precipitation on 20 to 25 days a month or more.
The Chimney Safety Institute of America counts water repellent among four low-cost steps against water damage, together with a cap, a sound crown and good flashing. A Seattle-area chimney company describes the same logic for local brick. In practice here, that means scheduling the treatment in July or August, when the masonry has had weeks to dry out.
Issaquah is a city nestled against the Issaquah Alps, with a historic downtown plus large newer developments in the highlands. We work every part of it — Gilman, Issaquah Highlands, Squak Valley included.
IssaquahKing County, WA · 47.530, -122.033
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–$795. A short stack in good shape is at the lower end; a tall chimney that needs cleaning and a second coat is higher. The figure is confirmed on site.
A breathable repellent generally needs renewing every few years. We note the date on your invoice so you know when to have it looked at again.
Because water often gets in through the cap, crown or flashing, not the brick, and an inspection finds the entry point. The on-site inspection is $99 plus tax, and it is credited toward the work when you approve the written quote.
A $99 on-site inspection, a written quote before any work, and photos of every item we touch.
