Chimney Waterproofing
A breathable waterproof sealant stops rain from soaking into your masonry while letting trapped moisture escape.
$285–$795
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Pick a real open slot on our crew's calendar — takes about a minute.
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Despite its sturdy appearance, your chimney's brick and mortar are inherently porous. With every South Seattle downpour, water saturates the masonry, where our characteristic damp winters then freeze it, expand it, and relentlessly fracture your chimney from within—a destructive phenomenon known as spalling. Our specialized vapor-permeable waterproofing sealant effectively repels external water while crucially allowing any trapped internal moisture to escape, letting your masonry breathe naturally. This service is a quick, affordable, and incredibly effective method to safeguard a structurally sound chimney for many years to come in our unique climate.
Given South Seattle's consistently damp Pacific Northwest climate, chimney waterproofing offers exceptional value. It's an indispensable safeguard against the relentless moisture that contributes to masonry deterioration.
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 the protective barrier of a sealant, every South Seattle rainstorm will inevitably drive water into your chimney's masonry, where it will freeze, expand, and contribute to destructive 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, fundamentally, are designed to be porous, which means every South Seattle rainstorm inevitably drives water deep into the masonry. During our distinctive winters, this absorbed water freezes, expands, and relentlessly fractures the surface—this is the relentless freeze-thaw cycle responsible for the vast majority of spalling damage. A specially formulated, vapor-permeable water repellent forms an invisible shield, preventing rain from soaking in while critically allowing any existing trapped moisture within the masonry to escape. This proactive treatment profoundly protects sound masonry for years, halting its gradual, season-by-season deterioration.
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.
Thirsty, water-stained brick given a breathable repellent that lets it dry from within.
Representative example of a typical chimney waterproofing — not a specific customer job. We add photos of our own completed South Seattle projects as we finish them.
A typical scenario from the lake slopes: brick on a Rainier Beach home that stays dark and damp long after the rain stops, with the first flakes of spalling showing. Porous hundred-year-old brick drinking the wet season, then catching a freeze, is exactly how the flaking starts. Once the masonry is confirmed sound, we apply a breathable repellent that turns away rain but lets the brick exhale its moisture. The wall sheds water again and faces the next cold snap in far better shape.
South 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 South 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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