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Redmond & the East Side, WA

Chimney Waterproofing on the East Side, WA

Chimney waterproofing in Redmond treats sound brick with a breathable water repellent, so that rain beads and runs off while moisture already inside can still escape.

Our price

$285–$790

  • $285–$790 — 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

Service
Town

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 Redmond

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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

Humidity in the usual sense is not the issue here: WeatherSpark reports that muggy conditions in Redmond stay at about 0% all year. The issue is how long things stay wet. In a western Washington winter, the Western Regional Climate Center finds just four to eight days per month that are clear or only partly cloudy, and it puts January relative humidity in the interior valleys near 87 percent before dawn. Brick that gets rained on in those months has few chances to dry. After any needed masonry repair, we clean the stack and apply a vapor-permeable repellent to the brick and joints.

The valley towns dry out even more slowly. WeatherSpark gives Carnation a wetter season of about 7.3 months, October 7 to May 17, and the regional climate center notes that in late summer and early fall the lower valleys are sometimes filled with fog or low clouds until noon. For a brick chimney in Duvall or Carnation, the window in which it can dry between soakings is short, and a repellent makes the most of it.

What's included

  • Inspection of brick, joints and crown before anything is applied
  • Gentle cleaning of the surfaces to be treated
  • Breathable, vapor-permeable water repellent applied to all exposed faces
  • Roof, siding and windows near the chimney protected from overspray
  • Photos of the chimney before and after treatment

Why it matters

A chimney is the one piece of masonry on most houses with all four sides and the top exposed. Across a wet season of nearly seven months, untreated brick absorbs water on every rainy day and gives it back slowly, and that soaked state is what feeds frost damage, staining and leaks.

The word that matters is breathable. A film-forming sealer or ordinary paint locks in whatever moisture the brick already holds, and frost then does its damage from the inside. A vapor-permeable repellent lines the pores without closing them. Waterproofing also has limits you should hear before you pay for it: it does not fix a cracked crown, open joints or bad flashing, and applied over those faults it only hides them for a while. Moss is a related sign. WSU Extension ties it to surfaces that remain wet for extended periods, which is exactly the condition a repellent is meant to shorten.

How it works

What to expect with chimney waterproofing

  1. 1

    Check first

    Cracked joints or a failed crown get repaired before treatment, never sealed over.

  2. 2

    Clean

    Moss, dirt and anything loose come off first; the repellent has to touch bare masonry.

  3. 3

    Apply

    The repellent goes on evenly over brick and mortar, in dry conditions.

  4. 4

    Confirm

    We photograph the finished stack and note the date of treatment in your report.

  • Licensed& insured Washington chimney contractor

  • 4 communitiesRedmond, Sammamish, Duvall and Carnation

  • $99 plus taxInspection, credited toward an approved quote

  • Every jobDocumented with before-and-after photos

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:

  • Brick that turns dark and stays dark for days after rain
  • White, powdery deposits blooming on the face of the stack
  • Green growth on the shaded side of the chimney
  • A damp, cellar-like odor at the hearth when it rains
  • Recent repointing or a new crown you want to protect

By town

Chimney Waterproofing in your town

The 4 East Side 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 Redmond Chimney Pros technician pointing to 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

  • 4 communitiesRedmond, Sammamish, Duvall and Carnation

  • $99 plus taxInspection, credited toward an approved quote

  • Every jobDocumented with before-and-after photos

Redmond Chimney Pros service van parked in a Redmond residential driveway

Serving Redmond, Sammamish, Duvall & Carnation

Chimney Waterproofing — common questions

How much does chimney waterproofing cost?

Our waterproofing runs $285–$790. The height and width of the stack, plus the amount of cleaning required beforehand, account for the spread.

Will the treatment change how my chimney looks?

A penetrating repellent is designed to dry clear and leave no film, so the brick keeps its color and texture. You notice it in the rain, when water beads on the surface.

My chimney leaks now. Will waterproofing stop it?

Not by itself, and only after the leak's source is found and fixed. Most chimney leaks come from the crown, the flashing or open joints, and a repellent cannot bridge any of those. The inspection sorts out which it is.

Can I pressure-wash the chimney myself first?

We would not. Extension specialists at Oregon State University caution that pressure-washing done wrong damages shingles; a hard jet does the same kind of harm to old mortar. Low-pressure cleaning is part of our visit.

What time of year is best?

Summer into early fall. The repellent needs a dry surface going on and dry weather while it cures, and Redmond's driest month is July, at about 0.9 inches of rain on WeatherSpark's averages.

See chimney waterproofing pricing in detailMore chimney questions

Get in touch

Book an inspection

Often booked alongside chimney waterproofing

Chimney Waterproofing and related prices in Redmond — published rates, 2026
ServicePrice in RedmondWhat that covers
Chimney Waterproofing$285–$790Breathable 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 Redmond. 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 (425) 470-6533Book