Green Lake, King County
Waterproofing a chimney in Green Lake runs $320 to $795. The size of the stack above the roof accounts for most of that range: more brick takes more product and more time on the ladder. Cleaning is the other variable, because repellent only bonds to brick carrying no moss, soot or old coatings. We confirm the brick is ready during the $99 plus tax inspection, and if you book the treatment from that quote the inspection charge is deducted.
Typical investment
$320–$795
Book an inspection
Book your $99 inspection
$99 plus tax, deducted when you approve the repair
Not sure where to start
Pick what you're seeing at your Green Lake home — we'll point you to the right fix.
What we do
The same crew, the same written quote — for Green Lake homes.
A Level 1 review of everything reachable, raised to a Level 2 camera scan when a question stays open
Learn more
The whole flue brushed, using heads picked for the liner's size and shape
Learn more
A photo assessment that distinguishes surface wear from structural damage
Learn more
Camera survey and measurements taken before any liner is chosen
Learn more
Measurement of each flue, or of the crown when a single cap will span several
Learn more
Glass removed, cleaned and checked for a sound gasket
Learn moreRanges shown for orientation — the exact figure is written up on-site, after the inspection.
The reason to treat brick here is the length of the wet season, not the violence of any one storm. WeatherSpark marks Seattle's wetter period at about 6.6 months, October 10 through April 30, and on any day inside it the chance of rain is better than 33 percent. November leads: about 7.5 inches, arriving on 16.7 days of the month. The state climate narrative from the Western Regional Climate Center gives the lowlands north to Seattle 32 to 35 inches a year, and notes that the Olympic Mountains' rain shadow ends not far west of here. A Green Lake chimney is therefore damp for half the year, and bare brick drinks at every shower.
Repellent works by lining the pores of the brick, and it cannot reach pores that are plugged with growth. Oregon State University Extension explains what a moss mat does to the surface beneath it: it holds soil and debris, and those keep the material wet for longer after each rain. On a chimney that means the damp season WeatherSpark measures, October into late April, lasts a little longer still on the mossy side.
Removal has to be gentle. Shingles are damaged by careless pressure washing, that Extension article warns; the faces of old brick are no tougher. On Green Lake chimneys we take moss off with stiff brushes and a low-pressure rinse, wait for the stack to dry, and only then spray. A treated surface sheds water faster, which also gives new moss less to live on.
Every chimney waterproofing we do in Green Lake includes:
Smoke coming back into the room, or a smell that won't go? Book the inspection first.
Book nowA repellent is not permanent. On its website a Seattle chimney company gives masonry repellent a life of 5-10 years; for chimneys around the city it advises a fresh coat at 5-7. We pass that figure along as a published local reference, not as our own promise. What we can add from the roof is the test: sprinkle water on the brick, and if it darkens and soaks in within seconds instead of beading, the last treatment is spent.
Repellent seals nothing that is cracked, so joints and crown are checked and fixed first.
First the growth and dirt are removed. Then we wait, because repellent enters only pores that have dried.
Each face is flooded with a low-pressure sprayer, working upward, and we stop when the brick takes no more.
After curing, water is sprinkled on the surface; it should bead and run off.
What this work is quoted at for Green Lake homes — the exact figure comes from the $99 on-site inspection, credited toward the work.
| Service | Price in Green Lake | What that covers |
|---|---|---|
| Chimney Waterproofing | $320–$795 | Breathable sealer — reapplied every 3–5 years in this climate |
| Chimney Sweep | $209–$459 | Full flue swept, Level 1 inspection included |
| Chimney Inspection | $99 plus tax | Level 1 visual; Level 2 adds a full camera scan |
| Chimney Relining | From $1,900 | Full-length stainless liner, sized to the appliance |
| Chimney Repair | From $425 | Masonry repair — brick and mortar, scoped after diagnosis |
Ranges are what these jobs are quoted at in Green Lake. 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.
Green Lake is a neighborhood wrapped around a 323-acre lake park, part of Seattle since 1891, on Green Lake, with houses that went up after the streetcar circled the lake in 1902.
Green LakeKing County, WA · 47.679, -122.328
Before and after
Illustrations of what each repair changes on a typical chimney — not photos of a specific job.
Before
After
Before
After
Before
After
Four steps, each one on paper — so you always know what happens next.
Choose a genuine opening on the crew's calendar. Confirmation is immediate.
Liner, crown, cap, flashing and masonry examined in order — each finding photographed.
One document, plain numbers, covering only the work your chimney genuinely needs.
The repair is completed, then handed over with before-and-after photos of every item.
A film-forming sealer can. We use vapor-permeable repellents that keep liquid water out while letting moisture already inside escape as vapor.
The drier stretch from mid-June to early October gives the brick time to dry out before and after application. A dry spell in spring can also work.
Only if the water was entering through the brick faces. Leaks at the flashing, crown or cap need their own repair, which is why we look at all three first.
A $99 on-site inspection, a written quote before any work, and photos of every item we touch.
