How Often Should You Pressure Wash Your Driveway?

There's no single answer that fits every driveway — how quickly dirt, moss and algae build up depends on the material, how shaded the area is, and what's growing nearby. That said, most homeowners find an annual clean keeps a driveway looking its best without letting grime become deeply ingrained.

Shaded, north-facing or tree-lined driveways tend to hold moisture longer, which speeds up algae and moss growth. If your driveway rarely sees direct sun, it may be worth cleaning it every six to nine months rather than waiting a full year.

Block paving in particular benefits from regular attention, since dirt and moss can work into the joints between blocks. Left too long, this can encourage weed growth and make the surface more slippery in wet weather.

A good rule of thumb: if you're starting to notice green or black staining, or the surface feels slippery when wet, it's a sign the driveway is due a proper clean rather than just a rinse with a garden hose.

Resealing or re-sanding block paving after a clean can also help slow down how quickly regrowth appears, meaning less frequent full cleans over time.