Booking a chimney cleaning in Everett, and what you are actually cleaning

Everett is usually described as an old housing city, and it is: as of 2023 more than 7,200 units dated from 1939 or earlier, and about half of all housing predated 1980. But the same table has a second story in it. The largest single year-built band in the city is the 1980s at 7,307 units, with another 7,050 from the 1990s. Those two decades together account for roughly twice as many homes as the pre-war band.

Those two eras did not build the same chimney. That is why a cleaning here starts with identification rather than with a brush.

A site-built masonry chimney

Brick or block laid on site, with a clay tile flue inside it and a masonry crown on top. The common answer in Everett's pre-war blocks. It is swept with rods and brushes sized to a rectangular tile flue, and the smoke shelf and smoke chamber behind the damper have to be cleared separately.

A factory-built metal chimney

A listed, tested metal chimney assembled from manufactured sections, usually inside a framed and sided chase with a flat metal chase cover on top. UL 103 is the standard these are built and rated to. The flue is round, the diameter is fixed, and the wrong brush can damage the inner wall rather than clean it.

An insert or stove in an older firebox

A third case, common where a pre-war fireplace was upgraded later. The appliance vents into a liner run up the old masonry flue, or sometimes into nothing but the old flue itself. Cleaning it means knowing what is behind the surround before anything is dismantled.

The top of a chimney is metal on both systems. The cap or chase cover, the spark arrestor screen inside it, the storm collar, and the flashing where the stack meets the roof are all steel, and in Everett they are working in marine air.

The city has about 25 miles of marine and freshwater shoreline, and a large share of its housing sits within a mile of tidewater. Guidance on coastal exposure holds that standard corrosivity categories are not sufficient inside that mile, because the microenvironment governs: prevailing wind direction, how exposed the face is, and how close the salt spray gets. On one structure, sheltered faces held their coating far longer than the faces taking chloride-rich wind head on.

That matters for a cleaning because of what a corroding arrestor screen does before it fails. Rust scale builds on the mesh, soot lands on the scale, and the openings close from the edges inward. A partly blinded screen slows the draft, and a slow draft smells like creosote, smokes back into the room on a still wet night, and reads to a homeowner as a dirty flue. Sometimes it is. Sometimes the flue is fine and the problem is six inches above the top of it.

The cleaning itself is indoor work and is not weather-bound. What is weather-bound is everything a cleaning tends to turn up on the roof, and Everett's calendar is unusually lopsided. The 1991-2020 normals for the Everett and Snohomish County Airport station give 6.14 inches of precipitation in November and 5.25 in December against 0.95 in July, and 12.66 inches across December through February against 4.05 across June through August.

So a cleaning booked in late summer or early autumn leaves a usable window to act on a corroded cap, a lifted flashing edge, or a crown that needs recasting before the wet months close it. A cleaning booked in January often ends with a finding that has to wait until spring, held in the meantime by a temporary measure.

• The interval and the trigger are different questions. The interval is annual: EPA and fire officials recommend having the appliance, chimney, and vent professionally inspected and cleaned every year. The trigger is a measurement: sweeping is recommended at about an eighth of an inch of buildup, and stove manufacturers publish the same order-of-magnitude figure with a monthly check during the heating season.
• Do not burn for at least a day beforehand. A warm flue and hot ash make containment harder and slow the work down.
• Know what you have been burning. State rule bans burning garbage, treated wood, plastics, rubber, asphalt products, waste petroleum products, paints, and chemicals in a solid fuel burning device, and those fuels leave deposits that behave differently from wood.

There is no Everett chimney license to ask for. The City of Everett's Permit Services office handles permits for construction and development, and sweeping is maintenance rather than construction, so the permit counter is not where this question gets answered.

The checkable requirement is a state one. In Washington the enforceable legal requirement for a chimney company is Labor and Industries contractor registration with a bond and insurance, not a chimney certification, and chimney cleaning and repair sits in the Masonry specialty contractor classification. A homeowner can look up any company's registration and its current status at L&I before booking, at no cost.

• Check the registration yourself. Look the company up in the L&I verification tool rather than taking a badge on a website at face value.
• Treat certifications as a separate question. CSIA itself warns homeowners that chimney sweeping is largely unregulated and that not all certifications are equivalent. Its credentials are held by named individuals, and anyone can look a company up in CSIA's public referrals directory.
• Ask what happens if the flue turns out to be metal. A company that has to reschedule because it arrived with masonry tooling for a chase-enclosed listed chimney has told you something about how it takes bookings.
• Ask for the scope in writing before the visit. What is being cleaned, what is being looked at, and what comes back as a separate recommendation rather than as work done on the spot.