Chimney Waterproofing
A breathable waterproof sealant stops rain from soaking into your masonry while letting trapped moisture escape.
$285–$795
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Brick and mortar are inherently porous materials. This means that with every rainfall, water penetrates deep into your masonry. In Kirkland's cold winters, this absorbed water freezes, expands, and systematically cracks your chimney apart — a damaging process known as spalling. Our vapor-permeable waterproofing sealant effectively blocks water entry while crucially allowing the masonry to breathe and release any trapped moisture. It's an affordable, quick, and highly effective method to safeguard a structurally sound chimney for many years.
Given the persistent dampness of the Pacific Northwest, proper waterproofing is exceptionally valuable in our wet climate, guarding against moisture intrusion.
Book your free inspection
Pick a real open slot on our crew's calendar — takes about a minute.
No openings that day — please try another date.
What's included
Brick is naturally porous, allowing every rain shower to saturate the masonry, where it subsequently freezes and causes damaging spalling.
How it works
We clean the masonry and pre-treat any small cracks or joints.
A breathable sealant is applied over the full chimney exterior.
The masonry repels water but still releases trapped moisture.
Photos document full, even coverage.
Local & accountable
Why it matters
Brick and mortar, by their very nature, are porous, meaning every rainstorm drives water deep into the masonry. During a chilly Seattle-area winter, this absorbed water freezes, expands, and progressively fractures the surface—this freeze-thaw cycle is the root cause of most spalling. A vapor-permeable water repellent prevents rain from soaking in, while still allowing any trapped moisture to escape, effectively protecting sound masonry for years and halting its season-by-season deterioration.
If any of these sound familiar, it's worth a free inspection:
See the difference
The before is porous, rain-stained brick drinking up every shower; the after has been treated with a breathable, vapor-permeable repellent. The distinction matters: the right product turns liquid water away at the surface while still letting trapped moisture escape, so the brick can't stay saturated and split apart in the next freeze. For sound masonry, it's a modest step that buys years.
Thirsty, rain-stained brick treated with a breathable repellent that lets it dry but not drink.
Representative example of a typical chimney waterproofing — not a specific customer job. We add photos of our own completed the Eastside projects as we finish them.
A representative scenario: a brick chimney on a Juanita home close enough to the lake that the masonry rarely gets a chance to dry, its face starting to flake after a few hard winters. Porous brick drinking up wind-driven rain and then freezing — that's exactly how spalling gets started around Lake Washington. Once we've confirmed the masonry is sound, we'd apply a breathable water repellent that turns rain away while letting the brick breathe. The result is masonry that sheds water and takes the next freeze-thaw season in stride.
King County's Eastside
Licensed local crews, free on-site inspection and a written quote before any work. Book a real open slot on our calendar.
What you can count on
Licensed local crews, an honest written quote, and photos of every job. No call centers, no scare tactics.
Licensed and insured for Eastside home-improvement work. We carry what the state requires and stand behind every repair.
You get a clear written quote — with the deposit and balance shown up front — before any work begins. We recommend only what your chimney actually needs.
Every job is documented with before-and-after photos, so you can see exactly what was inspected and what was repaired — no guesswork.
Completed work comes with a written warranty document, so your repair is backed in writing — not just a handshake.
A clear deposit — never more than 50% — shown up front on your written quote, with the balance due only once the work is finished and you're satisfied.
The crew that quotes your job is the crew that does it — no call centers, no rotating subcontractors.
Related services
One local crew handles your whole chimney — here's what most homeowners pair with it.
By town
Service-area map — King County, WA. Map data © OpenStreetMap contributors.
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