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South Seattle, WA

Chimney Waterproofing in South Seattle, WA

Waterproofing a chimney in South Seattle: once repairs are done, a breathable repellent goes onto the brick and mortar, so rain beads up outside while moisture in the wall can still escape.

Our price

$285–$795

  • $285–$795 — what we charge for chimney waterproofing
  • $99 plus tax on-site inspection, credited toward an approved quote
  • Written quote before any work starts — photos of every job
  • Local crews
  • Licensed & insured
  • Documented work
  • Written quote first

Book an inspection

Book your $99 inspection

$99 plus tax, deducted when you approve the repair

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Book your $99 inspection

Pick a real open slot on our crew's calendar — takes about a minute.

  • No payment to book
  • Written on-site quote
  • Photos of every job
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Chimney Waterproofing in Beacon Hill

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October 2026
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What's going on with your chimney?

Pick what you're seeing — we'll point you to the right fix.

What we do

Our services

Sweeping, inspection, relining and masonry — one local crew for the whole chimney.

Ranges shown for orientation — the exact figure is written up on-site, after the inspection.

What chimney waterproofing actually involves

Seattle masonry seldom gets the chance to dry out. Count the drying days in a lowland winter and the Western Regional Climate Center comes up with a mere 4 to 8 per month that are even partly clear, WeatherSpark finds January skies over Seattle overcast or mostly cloudy 71% of the time, and the year's shortest day lasts only 8 hours 26 minutes. Brick soaked by one storm is frequently still damp when the next arrives. Once the necessary masonry repairs are complete, we wash the chimney at low pressure and treat brick and joints alike with a vapor-permeable repellent.

Rainier Beach occupies Seattle's southeast corner on the lakeshore, and by WeatherSpark's count the city's prevailing wind blows from a southerly direction roughly 9.5 months of every year. For houses along the lake there, the south face of the chimney takes the bulk of the wind-blown rain and tends to be the last to dry. When we treat a Rainier Beach chimney, that side gets the most careful inspection before the repellent goes on and again afterward.

What's included

  • A pre-treatment check of brick, joints and crown
  • Low-pressure cleaning of each face that will be treated
  • All exposed faces treated with a repellent that lets vapor through
  • Roof, siding and windows masked against overspray
  • Before and after photos, each with its date

Why it matters

No masonry on a house is more exposed than the chimney: four sides plus a top, sticking up above the roof with no shelter at all. Brick is porous, and over a Seattle winter it soaks up water much more often than it gets to give it back. Stains, frost damage and indoor leaks all begin in saturated brick.

The repellent has to breathe. Paint or a film-forming sealer seals in moisture that is already in the masonry, and when that moisture freezes, brick faces spall. A penetrating repellent coats the inside of the pores without sealing them against vapor. It has clear limits, though: it will not close a cracked crown, replace missing mortar or repair flashing, and spraying it over those problems just masks them for a season. Moss belongs in the same conversation. In the damp Pacific Northwest, roof moss cannot be avoided, Oregon State University Extension says; shade feeds it as much as rain does, and a mat of it can pry asphalt shingles up and let water beneath them.

How it works

What to expect with chimney waterproofing

  1. 1

    Fix the defects

    Cracked crowns and open joints are repaired first, since no repellent can span a gap.

  2. 2

    Wash

    Moss and dirt come off first, because the repellent has to touch bare brick to work.

  3. 3

    Coat on a dry day

    A single even application on dry brick and mortar, with a dry forecast ahead.

  • Licensed& insured Washington chimney contractor

  • 10 neighborhoodsSouth Seattle, from Beacon Hill and Georgetown to Rainier Beach

  • $99 plus taxOn-site inspection, taken off the quote you approve

  • Every visitPhotographed before and after the work

Signs you may need chimney waterproofing

If any of these sound familiar, book the $99 plus tax inspection — credited toward the work if you approve the quote:

  • Dark, wet-looking brick on a day when the shingles are already dry
  • White, chalky deposits creeping over the faces
  • A greenish film on the shady side of the chimney
  • A damp, musty odor from the firebox during wet spells
  • Recent mortar or crown work you would like to keep dry

By town

Chimney Waterproofing in your town

The 10 South Seattle communities we serve. Pick yours for local scheduling and the chimney issues we see there.

Before and after

What the work changes

Illustrations of what each repair changes on a typical chimney — not photos of a specific job.

A South Seattle Chimney Pros technician pointing toward the four steps of a visit

From booking to done

Four steps, each one on paper — so you always know what happens next.

  1. 1

    Book online

    Choose a genuine opening on the crew's calendar. Confirmation is immediate.

  2. 2

    On-site inspection

    Liner, crown, cap, flashing and masonry examined in order — each finding photographed.

  3. 3

    Written quote

    One document, plain numbers, covering only the work your chimney genuinely needs.

  4. 4

    Work done & documented

    The repair is completed, then handed over with before-and-after photos of every item.

Before you let anyone in

What you can verify about us

Every fact below is one you can check yourself before we ever set foot on your roof.

  • Licensed& insured Washington chimney contractor

  • 10 neighborhoodsSouth Seattle, from Beacon Hill and Georgetown to Rainier Beach

  • $99 plus taxOn-site inspection, taken off the quote you approve

  • Every visitPhotographed before and after the work

The South Seattle Chimney Pros service van parked in front of a South Seattle bungalow

Serving Beacon Hill, Georgetown, the Rainier Valley & the lakeshore

Chimney Waterproofing — common questions

What is the price range for waterproofing?

$285–$795. Most of the difference comes down to the chimney's size and how much cleaning it needs beforehand.

Does treated brick end up glossy or darker?

It should not. A penetrating repellent cures without shine or a surface film. The only visible change is during rain, when water beads on the brick rather than sinking in.

Water is getting in around my chimney. Is a repellent the answer?

Rarely on its own. Most leaks enter through the crown, the flashing or open mortar joints, and a repellent cannot seal any of them. We track down where the water actually enters and repair that, and only then treat the brick.

Is it a good idea to pressure-wash the chimney myself beforehand?

Please do not. OSU Extension warns that roof moss removal is not suitable for everyone and recommends cleaning before any treatment is applied, and old mortar is no tougher than a shingle. Low-pressure cleaning is already part of our service.

Which part of the year do you schedule this?

Mid-June through early October, which WeatherSpark identifies as Seattle's clearer season. The brick has to be dry when we apply the product and remain dry while it cures.

See chimney waterproofing pricing in detailMore chimney questions

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Book an inspection

Often booked alongside chimney waterproofing

Chimney Waterproofing and related prices in South Seattle — published rates, 2026
ServicePrice in South SeattleWhat that covers
Chimney Waterproofing$285–$795Breathable sealer — reapplied every 3–5 years in this climate
Chimney Sweep$189–$449Full flue swept, Level 1 inspection included
Chimney Inspection$99 plus taxLevel 1 visual; Level 2 adds a full camera scan
Chimney ReliningFrom $1,900Full-length stainless liner, sized to the appliance

Ranges are what these jobs are quoted at in South Seattle. 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.

Ready to book your chimney waterproofing?

Licensed local crews, a $99 on-site inspection credited toward repairs, and a written quote before any work. Book a real open slot on our calendar.

Call (206) 984-4736Book