Fast, Reliable Chimney Repair Across Seattle
Chimney repair in Seattle typically costs $450–$2,800 depending on the scope, and most standard repairs are completed within one to two days. For urgent moisture damage or structural concerns, we offer same-week scheduling throughout the metro area. Call us at (866) 541-8697 for a free, on-site estimate.
We’ve been working on Seattle chimneys for 17 years, and we’ve learned that this city’s repair needs are unlike anywhere else in the country. The 150-plus days of annual rainfall, the moss that colonizes brickwork like it’s part of the architecture, and the century-old lime-based mortar in neighborhoods from Ballard to Capitol Hill create a specific pattern of damage we see again and again. Our Chimney Repair team doesn’t just fix chimneys — we diagnose how Seattle’s maritime climate got into your flue in the first place. Whether you’re in a 1910 Craftsman near Fremont’s ship canal or a mid-century ranch in West Seattle, we know what to look for and what it’ll take to stop the water.
Why Horizon Chimney Sweep Washington Is Seattle’s Preferred Chimney Repair Company
James Wilson, our owner, still works as the lead technician on jobs across Seattle. When you schedule with us, you’re getting 17 years of hands-on chimney expertise at your door — not a subcontractor learning on the fly. That matters in a city where the difference between a proper repointing job and a surface patch is whether your chimney survives another decade of PNW rainfall.
Our reputation here is documented: 1,006 verified customer reviews averaging 4.8 stars. That scale of feedback reflects sustained, repeated trust from Seattle homeowners who’ve called us back year after year. We’re not coasting on a handful of curated testimonials.
We respond to Seattle calls within 24 hours for standard repairs, and we prioritize moisture-related emergencies — because in this climate, a week of delay can turn a small mortar gap into interior water damage. We stock parts from trusted brands including Gelco, Olympia Chimney, and Famco, which means faster turnaround without waiting on cross-country shipping.
We also understand the regulatory landscape here. The Puget Sound Clean Air Agency’s seasonal burn bans aren’t just a scheduling inconvenience — they create a stop-start cycle that stresses chimneys and catches homeowners off-guard when bans lift. We factor that into our inspections and repair recommendations.
Our Chimney Repair Services in Seattle
Mortar Repointing
In Seattle, repointing isn’t optional maintenance — it’s structural survival. The lime-based mortar in pre-1940 brick chimneys, common throughout Wallingford and Fremont, was never formulated for 150 days of annual rainfall. Over decades, that mortar washes out, leaving gaps that let water straight into the flue cavity. We remove deteriorated mortar to proper depth and repoint with modern, vapor-permeable mortar that matches the original lime composition structurally while allowing the chimney to breathe. A typical repointing job on a Seattle chimney runs $850–$1,600 for partial work, $1,800–$2,800 for full chimney restoration.
Spalling Brick Repair
Seattle’s moss colonies are the hidden driver behind most spalling we see. Moss doesn’t just sit on the surface — it roots into mortar joints, holds moisture against brick faces, and accelerates surface flaking during our mild wet winters. Unlike the freeze-thaw spalling common in Chicago or Denver, Seattle spalling is slow, chronic, and often hidden until chunks of brick face fall away. We assess whether individual brick replacement or broader repointing and waterproofing is the right path. Brick replacement with matching sourcing typically adds $45–$85 per brick to a repointing scope.
Chimney Waterproofing
Waterproofing a Seattle chimney requires the right product applied the right way. We use breathable, silane-siloxane-based sealants — never film-forming coatings that trap moisture inside the masonry. That’s critical here, where chimneys are rarely dry long enough to outlast a bad sealant choice. We apply waterproofing after repointing is complete, ensuring the mortar cures properly first. Full chimney waterproofing in Seattle typically costs $450–$750 depending on height and accessibility. For homes on steep lots in Queen Anne or West Seattle, access complexity can push toward the higher end.
Flashing Repair
Seattle’s driving rains expose flashing failures fast. The intersection where chimney meets roof is the most common leak point we investigate, and in older homes with original step flashing, the metal simply fatigues after decades of thermal cycling in wet conditions. We repair or replace flashing using copper or lead-coated copper where appropriate, integrated with proper counterflashing into the masonry. Flashing repair alone runs $350–$650; if the surrounding masonry is compromised, we’ll quote the combined scope upfront.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Seattle
We install and repair using professional-grade materials from Gelco, Olympia Chimney, and Famco — brands that hold up to Seattle’s specific demands. Gelco’s stainless steel flue liners resist the acidic, moisture-laden creosote common in our damp climate. Olympia Chimney’s venting components meet the sizing and clearance requirements we encounter in Seattle’s tighter, older construction. We keep common sizes and fittings in stock, which means most Seattle customers aren’t waiting on special orders while rainwater continues finding its way in.
Common Chimney Repair Problems We See in Seattle Homes
- Lime mortar washed out by persistent rainfall. The original mortar in Ballard and Capitol Hill chimneys was never meant for this much water. We regularly find joints eroded to finger-depth, with the inner wythe exposed to direct moisture intrusion.
- Moss colonies trapping moisture against brickwork. That green fuzz isn’t cosmetic. In Fremont, we worked on a 1923 Craftsman’s original brick chimney where decades of moss had widened mortar joints enough to let rainwater pour into the flue. We repointed with a modern, permeable mortar to match the original lime-based structure, then installed a Gelco flue liner to protect against future moisture and a chimney cap to keep out nesting birds.
- Damp flues producing sticky, wet creosote. Seattle’s maritime wetness means creosote deposits are heavier and more adhesive than in drier climates. When burn bans lift and homeowners light that first fire, the risk of incomplete combustion and chimney fire spikes — especially if moisture has already damaged flue tiles.
- Bird nesting and debris accumulation during burn ban dormancy. When the Puget Sound Clean Air Agency issues a Mandatory Burn Ban, chimneys sit unused for weeks. That’s prime time for birds to establish nests, for leaves to accumulate, and for homeowners to forget these hazards exist until that first post-ban fire.
Pricing for Chimney Repair in Seattle, WA
| Service | Typical Range in Seattle |
|---|---|
| Spot mortar repointing (partial chimney) | $850 – $1,600 |
| Full chimney repointing | $1,800 – $2,800 |
| Brick replacement (per brick, with matching) | $45 – $85 |
| Chimney waterproofing | $450 – $750 |
| Flashing repair or replacement | $350 – $650 |
| Chimney rebuild (partial, above roofline) | $2,500 – $5,500 |
| Full chimney rebuild | $6,000 – $12,000 |
What moves a job toward the higher end: chimney height above two stories, steep roof access common in Queen Anne or West Seattle, extensive moss remediation before work begins, and the need for historical mortar matching in designated neighborhoods. We provide itemized, upfront quotes — no open-ended billing. Every estimate is free, and we’ll walk you through exactly what we’re proposing and why. Call (866) 541-8697 to schedule yours.
We Also Serve Cities Near Seattle
Our repair crews work throughout the central Puget Sound area, including White Center, Mercer Island, Bellevue, and Boulevard Park. The same moisture-driven repair patterns apply across these communities, and we maintain the same response standards and pricing transparency. If you’re just outside Seattle city limits, we’re still your nearest chimney-exclusive specialist with the parts inventory and local knowledge to handle your job without delay.
Serving Seattle, WA — Our Local Coverage Area
We’re based in the Seattle area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs — Chimney Repair in Seattle
Moss holds moisture against mortar joints 24 hours a day, accelerating erosion and allowing water into the flue structure. In Seattle’s climate, moss is never just a cosmetic issue — it’s active moisture damage that compounds with every rainy season. We remove moss colonies, treat the masonry, and address the underlying mortar degradation before waterproofing. Call (866) 541-8697 and we’ll assess whether the moss has already compromised your chimney’s structure.
Yes — but only the right type. We apply breathable silane-siloxane sealants after repointing is complete, never film-forming coatings that trap moisture inside brickwork. In Seattle’s wet climate, a non-breathable sealant can accelerate the very damage it’s supposed to prevent. Waterproofing typically costs $450–$750 and extends repointing intervals significantly. Call for a free evaluation of whether your chimney’s ready for treatment.
Well-executed repointing with modern permeable mortar should last 25–30 years in Seattle’s climate, compared to 15–20 years for original lime mortar that’s been saturated by a century of rainfall. If your chimney was last repointed before 2000, it’s worth an inspection — especially if you can see mortar erosion or moss rooting into joints. We offer free condition assessments; call (866) 541-8697 to schedule.
Partial repointing combined with moisture remediation — specifically, addressing mortar joints eroded by persistent rainfall and moss colonization, then protecting the restored masonry. This pattern dominates in pre-WWII neighborhoods like Ballard, Wallingford, and Fremont where original brick chimneys have endured 80–100 years of PNW weather. Call us and we’ll tell you exactly what your chimney needs.
Yes — indirectly but significantly. Burn bans cause extended dormancy, which lets moisture accumulate, moss establish, and birds nest undisturbed. When bans lift and homeowners light fires immediately, often without inspection, pre-existing moisture damage and hidden obstructions create immediate hazards. We recommend a post-ban inspection before that first fire, especially if your chimney showed any wear before the ban period. Call (866) 541-8697 to book a priority inspection when bans lift.
Written by James Wilson, Owner at Horizon Chimney Sweep Washington, serving Seattle since 2007.