How Often Should You Wash the Exterior of Your House?
Most homes benefit from a soft-wash exterior cleaning every two to three years. Homes with heavy tree canopy, north-facing exposure, or in humid climates like West Michigan often need it every one to two years, because those conditions let algae and mildew grow back faster. The clearest signal is visual: when you see a green tinge creeping across the shaded walls or black streaking starting on the roof, it's time.
What changes how often you need it
- Tree canopy — shade plus falling organic debris feeds algae; wooded lots green up faster.
- Sun exposure — north and shaded walls grow algae fastest; sunny walls stay cleaner longer.
- Siding material — vinyl shows algae quickly; brick hides it longer; wood holds moisture and returns faster.
- Climate — West Michigan's humidity, lake effect, spring pollen, and fall leaf drop all accelerate growth.
Frequency by surface
| Surface | Typical frequency (West Michigan) |
|---|---|
| Roof | Every 3–5 years |
| Siding | Every 2–3 years (1–2 if shaded/wooded) |
| Driveway & concrete | Every 1–2 years |
| Deck | Annually to every 2 years |
| Gutters | Twice a year |
Signs it's time
You don't have to track the calendar — the house tells you. Watch for a green or gray film on north-facing walls, dark streaking starting on the roof, slippery algae on shaded walkways, and that overall "dull" look where the color seems faded. Catching it early means a faster, cheaper clean and less chance of the growth doing damage. See the best time of year to wash for scheduling.
Common questions
How often should I wash my house in Michigan?
Every two to three years for most West Michigan homes, and every one to two years for homes with heavy tree cover or lots of shade, because those conditions grow algae back faster.
Does washing my house too often damage it?
Not when it's soft washing — the low pressure and proper dilution are gentle on siding, so there's no harm in cleaning when the house needs it. It's high-pressure washing done repeatedly that causes wear.