Chimney Waterproofing
A breathable waterproof sealant stops rain from soaking into your masonry while letting trapped moisture escape.
$320–$795
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The classic brick and mortar of many North Seattle homes are inherently porous, meaning every rainfall drives water deep into the masonry. During our Pacific Northwest winters, this trapped water freezes, expands, and relentlessly cracks your chimney apart – a destructive process known as spalling. Our vapor-permeable waterproofing sealant creates an effective barrier, preventing water intrusion while crucially allowing the masonry to 'breathe.' It's an affordable, quick, and highly effective way to safeguard a sound chimney for many years to come.
Given the persistent dampness and frequent rainfall across North Seattle, waterproofing is an exceptionally valuable preventative measure in our unique wet climate, providing crucial protection against moisture damage.
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, by its very nature, is porous. Without proper sealing, every heavy rainstorm forces water into the masonry, where it can freeze and cause spalling, progressively damaging your chimney.
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
The inherent porosity of brick and mortar means that every rainstorm in North Seattle drives water deep into your chimney's structure. In our local winters, this absorbed water freezes, expands, and relentlessly cracks the surface apart – this freeze-thaw cycle is the root cause of most spalling damage. A high-quality, vapor-permeable water repellent effectively blocks rain from soaking in while still permitting any trapped moisture to escape. This crucial barrier protects sound masonry for years, preventing the season-by-season deterioration that leads to costly repairs.
If any of these sound familiar, it's worth a free inspection:
See the difference
The before is porous, water-stained brick that soaks up rain like a sponge; the after is sealed with a breathable, vapor-permeable masonry repellent. The right product blocks liquid water from entering while still letting trapped moisture escape — so the brick doesn't trap water and crack apart in a freeze. It's a low-cost step that extends the life of sound masonry.
Rain-darkened, porous brick sealed with a breathable repellent that lets it dry out.
Representative example of a typical chimney waterproofing — not a specific customer job. We add photos of our own completed North Seattle projects as we finish them.
A representative scenario: a brick chimney in Ballard, close enough to Shilshole to feel the marine air, where the masonry stays damp for months and the face has begun to flake. Porous, century-old brick that drinks the rain and then meets a cold snap is exactly how spalling starts up here. Once the masonry checks out sound, we'd apply a breathable water repellent that blocks liquid water but lets the brick dry out. The result is masonry that sheds the drizzle and stands up better to the next freeze.
North Seattle
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 North Seattle 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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