In the DMV, humidity, tree cover and heavy spring pollen mean exteriors get dirty faster than in drier climates. But washing too often wastes money, and washing the wrong way can do damage. Here's a realistic schedule.
RECOMMENDED SCHEDULE
| Surface | How Often | Best Time |
|---|---|---|
| Vinyl siding | Every 1–2 years | April–June |
| Painted wood or fiber cement | Every 1–2 years, gently | Spring, before painting |
| Brick | Every 2–3 years, as needed | Spring or fall |
| Wood deck | Yearly, before resealing every 2–3 years | Spring |
| Composite deck | Yearly | Spring |
| Driveway and walkways | Every 1–2 years | Spring or early fall |
| Fence | Every 2–3 years | Spring |
| Roof (soft wash only) | Every 3–5 years for black streaks | Spring or fall |
WHEN TO WASH MORE OFTEN
- Homes surrounded by trees or on the shady side of a hill
- Houses near busy roads with exhaust grime
- Before painting or staining (always)
- Before listing the house for sale
- Rentals at turnover
WHEN TO WAIT
- During peak pollen (roughly April into May): surfaces get coated again within days. Wash just after the pollen drop.
- Below about 40°F: water can freeze on surfaces and in cracks.
- Right after sealing: let concrete and deck sealers cure first.
THE BUNDLE APPROACH
Many homeowners wash the house, deck and driveway in one visit every spring. It's usually cheaper per area than separate trips, and the whole property looks refreshed at once.
Pressure washing is maintenance, not just appearance. Mildew and grime hold moisture against surfaces, and that shortens the life of paint, stain and sealers.
RELATED READING
PRESSURE WASHING COST GUIDE FOR THE DMV (2026)
What you'll pay to pressure wash driveways, decks, siding, and patios — plus soft wash vs. pressure wash and what's actually worth doing.
GREEN ALGAE ON VINYL SIDING
Why the shady side turns green, how to clean it without damage, and how to slow it down.
CONCRETE SEALING: COST, TIMING & WHY
How often to seal patios and driveways, what it costs, and the best window before winter.
Planning a project? See our Pressure Washing service page for scope, process and recent work.
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