The short version. Gutters come clear between late October and January, once the needle drop is under way. Moss comes off on any dry day from October through May, and spring is when the results show fastest. Both are seasons rather than dates — there is more room in the year than most advice suggests.
Call (253) 366-8066 and we’ll connect you with a licensed local specialist who works Steilacoom.
What Steilacoom is working with
the median year a Steilacoom detached home was built. 19% of them predate 1960.
Pierce County Assessor, Aug 2026of Steilacoom’s 2,013 detached homes have a roof moss grows on.
Pierce County Assessor, Aug 2026through the gutters for every inch of rain that lands on a typical roof here.
Pierce County Assessor, Aug 2026contributing properties in the National Register historic district. Roofing work on them runs through a review path.
Steilacoom Municipal Code Ch. 2.14A town incorporated in 1854, sloping about 330 feet down to Puget Sound, with a 1970s median build year layered over a historic core that predates statehood.
The Steilacoom year
The two jobs
Gutter cleaning in Steilacoom
When to book it, what a thorough visit includes, the 33,100 gallons a year a typical Steilacoom roof sheds, and where the debris is supposed to go.
Read the page →Roof moss removal in Steilacoom
Which stage your roof is at, what a treatment actually involves, how much product a Steilacoom roof takes, and the license behind the work.
Read the page →The background, if you want it
These are county-wide and go deeper than the two pages above. None of them are required reading before you call.
- Does moss actually damage your roof? Moss, algae and lichen are three different things and only one of them matters. Includes a five-stage scale so you can place your own roof.
- When should you treat roof moss? A dry day between October and May, and why spring is when the results show fastest.
- Does your contractor need a license? Washington law treats your roof as “land,” which puts moss treatment under the Pesticide Application Act. Most people are surprised.
- Do gutter guards actually work? Yes — when the type matches your trees. The evidence for guards in conifer country, and how the right one gets chosen.
Where we work in Steilacoom
Not sure which one you need?
Tell us your neighborhood and roughly what is above the roof. We will tell you what to do and when to book it, then connect you with a licensed local specialist who works Steilacoom. No cost to you, no obligation, and no call center.
Call (253) 366-8066Get a Free Quote Cascade Roof & Gutter is not a contractor and does not perform work. We connect Pierce County homeowners with independent licensed specialists.Nearby
Cascade covers all of Pierce County. The nearest other guides:
Sources
- Pierce County Assessor-Treasurer, improvement_builtas and tax_account extracts, August 2026, joined on parcel number — 2,013 Steilacoom single-family detached homes, roof cover, year built and floor area.
- NOAA NCEI, U.S. Climate Normals 1991–2020, Tacoma No. 1 — 40.81 in annual, 6.50 in November.
- Reukema, D.L. (1964), USDA Forest Service Research Note PNW-14 — Douglas fir litterfall by month.
- Steilacoom Municipal Code Ch. 2.14 — Historic Preservation and Review Board; § 2.14.061(C) on roofing replacement and materials.
- Town of Steilacoom Comprehensive Plan, 2015 — elevation, Chambers Creek fishery, eelgrass beds.
- Washington Dept. of Ecology, Western Washington Phase II Municipal Stormwater Permit (2024) — conditionally allowable building washdown.