The short version. In conifer country the season runs from late October through January, with late November and December the sweet spot. Under heavy fir it is worth two visits — one once the drop is under way, one in spring.
Most Pierce County homes need it once or twice a year. Under mature Douglas fir on a north-facing slope, twice.
Call (253) 366-8066 and we’ll connect you with a licensed local specialist who works in your area.
Why the timing matters more here
The advice you will find everywhere is “spring and fall.” That is written for maple country. Pierce County runs on conifers, and conifers behave differently.
The USDA Forest Service measured Douglas fir litterfall in the Pacific Northwest across thirteen years. Needle drop peaks in October, about half the annual load falls in October and November, and the minimum is April — the month the standard advice sends you up a ladder.
Douglas fir litterfall (USDA Forest Service PNW-14) against Tacoma monthly precipitation (NOAA 1991–2020).
In a deciduous climate the leaf drop and the heaviest rain are months apart. Here they arrive together. The needles land in October and November; November through January brings 18.1 inches, 46% of Tacoma’s annual rainfall. A gutter that fills in November is a gutter that overflows for the rest of winter.
What’s actually going through them
More than people picture, and we can be specific rather than guessing. Across 121,527 pre-1990 Pierce County homes with a moss-susceptible roof, the median roof footprint is about 1,199 square feet — which puts roughly 750 gallons through the gutters for every inch of rain that lands on it, and close to 29,000 gallons over a year.
| Period | Rainfall | Through the gutters |
|---|---|---|
| One inch of rain | 1.00 in | 750 gal |
| November alone | 6.68 in | 5,000 gal |
| November – January | 18.10 in | 13,500 gal |
| Full year | 39.22 in | 29,300 gal |
Footprint is recorded floor area divided by story count, from the county tax roll; gallons are footprint × inches × 0.623. An attached garage is not carried in floor area, so treat these as a floor rather than a ceiling.
When that cannot get through, it goes over the front edge and lands in a narrow strip against the foundation — at the time of year the ground is already saturated and least able to take it. The Department of Energy’s guidance is to discharge at least five feet out from the foundation for exactly this reason, and Building Science Corporation notes a typical roof can concentrate runoff from a quarter of the entire roof into a six-foot length of gutter.
That matters here more than most places, because Washington is crawl-space country — and moisture under the floor does not stay under the floor. Warm air rising through the house draws it up.
What a proper clean includes
Worth knowing what you are paying for, because the difference between a good visit and a quick one shows up in February.
- Debris cleared by hand, bagged, and taken away on the truck — keeping it out of the downspouts and out of the storm drains
- Downspouts checked and cleared, all the way through to the outlet
- Flow tested with water once the debris is out
- Fasteners and pitch checked — gutters should fall at least a sixteenth of an inch per foot toward the outlet
- Roof valleys cleared of needle build-up, which is where the next gutter-full comes from
- Discharge point confirmed — water landing well clear of the foundation, not beside it
Doing it yourself
Plenty of people do, and on a single-story house with easy access that is a reasonable Saturday. Two things to know first.
Among the pre-1990 homes this page is about, 65% are single story and 12% are two story, with the rest split-level or a story and a half. A second story changes the job entirely: ladder height, footing on wet ground, and working above a hard surface. Extension guidance is to extend the ladder three rungs past the roof edge, secure it against tipping, and never work in weather where ice or rain is possible — which in November is most days.
It is also worth being realistic about frequency. A clean is not a one-off; under fir it is an annual commitment at minimum, at the least pleasant time of year.
Get it booked before the rain sets in
Tell us your city and roughly what is above your roof. We’ll connect you with a licensed local specialist who works your area — 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.By city
Timing and cost vary by city — tree cover and housing age are not evenly spread across the county. Your city:
- Gutter cleaning in Tacoma
- Gutter cleaning in Lakewood
- Gutter cleaning in Puyallup
- Gutter cleaning in Spanaway
- Gutter cleaning in Graham
- Gutter cleaning in Bonney Lake
- Gutter cleaning in Sumner
- Gutter cleaning in Edgewood
- Gutter cleaning in Gig Harbor
- Gutter cleaning in Fircrest
- Gutter cleaning in Steilacoom
- Gutter cleaning in University Place
Sources
- Reukema, D.L. (1964), Litter fall in a young Douglas-fir stand as influenced by thinning, USDA Forest Service Research Note PNW-14.
- NOAA NCEI, U.S. Climate Normals 1991–2020, Tacoma No. 1 (GHCND:USC00458278) — 39.22 in annual, November 6.68 in.
- University of Nebraska–Lincoln Extension G2220 — roof runoff calculation (area × inches × 0.623).
- US Department of Energy, Building America Solution Center — gutters, downspouts and crawl spaces.
- Ueno & Lstiburek, BA-1015 Bulk Water Control Methods for Foundations, Building Science Corporation.
- Pierce County Assessor-Treasurer, improvement_builtas extract, August 2026 — story counts and floor areas.
- WVU Extension — ladder safety guidance for gutter work.