Short answer: clean top-down — roof, then gutters, then siding, then driveway — in late spring, once the wet season eases. Eight months of Puget Sound rain grows something on every exterior surface, and the right method differs by surface: gentle treatment up top, soft washing on the walls, real pressure only on the concrete.
Why spring, and why in order
By May, the region's homes wear the winter: moss establishing on shaded roof slopes, gutters loaded with a winter's needles, green film on north-facing siding, and algae-slick driveways. Spring cleaning isn't vanity — it's the reset that stops each of those from compounding through another cycle. And the order matters: work downhill, so the roof's debris lands before the gutters are cleared, and the siding's runoff rinses before the flatwork is finished.
The checklist
1. Roof: treat and clear. Moss treatment in spring kills the winter's growth at the root. Valleys and surfaces get cleared of debris — gently, never with pressure.
2. Gutters: clear and repair. A winter of needles and moss shed ends up here. Clearing, flushing downspouts, and fixing what winter loosened — sagging runs, leaking seams — while the ladders are up.
3. Siding, fences, stucco: soft wash. The green film and mildew come off with soft washing — low pressure, tailored solutions that kill the growth so it stays gone longer. No pressure washer near paint or panels.
4. Driveway, walkways, patio: pressure wash. Hard concrete gets the real thing: pre-treatment plus controlled pressure. This is also a safety fix — winter's algae film is genuinely slippery.
5. While it's all visible: inspect. Spring is the natural moment for a free roof inspection — documenting what windstorm season did while repairs are still small and schedules still open.
One crew, one visit
Every step above is method-matched to its surface, which is exactly why booking it as one coordinated visit works so well — and why we offer it that way across the Eastside and Seattle. One estimate, one crew, the whole exterior reset for the year: (425) 270-1525.