How Often Should You Pressure Wash Your House on the Gulf Coast?

If you moved to Mobile from somewhere drier, you've probably noticed your house gets green a lot faster here. That's not your imagination — and it changes how often you should be washing. Here's a realistic schedule for the Gulf Coast.

The short version

• House (siding): once a year, sometimes every 6–9 months under heavy shade.
• Roof: every 3–5 years, sooner if it's under trees.
• Driveway and concrete: once a year, or whenever it looks blotchy.
• Commercial property: quarterly or monthly, depending on traffic.

Why Gulf Coast homes get dirty faster

Mobile is one of the most humid, rainiest cities in the country, with heavy live-oak canopy over much of it. Algae, mildew, and mold thrive in exactly that combination — warm, wet, and shaded. Add spring pine and oak pollen that films everything yellow, and salt air near the bay that holds moisture on surfaces longer, and the result is simple: exteriors here grow green faster and need more frequent cleaning than almost anywhere drier.

How often each surface really needs it

Your house: yearly. Most Mobile-area homes look their best on an annual soft wash. If your house sits under big oaks or faces north into permanent shade, the green comes back faster — every six to nine months keeps you ahead of it. Homes in full sun can sometimes stretch a little longer.

Your roof: every 3–5 years. Roof algae (those black streaks) grows slower than siding mildew, so a proper roof soft wash lasts several years here. Heavily shaded roofs with moss trend toward the shorter end.

Your driveway: yearly. Concrete greens and blackens with organic growth, especially in shade. A yearly surface clean keeps it bright; treating the algae means it stays clean longer instead of returning by the next rainy month.

The best time of year to wash

You can wash year-round on the Gulf Coast, but there are smart windows:

• Spring (after pollen season): the most popular time — it clears off the winter mildew and the yellow pollen film in one shot, right before you're outside enjoying the yard.
• Early fall: knocks down a summer's worth of growth before the holidays.
• Before an event or a home sale: curb appeal on demand.

The one thing not to do is wait years. Growth that sits for seasons digs into porous surfaces and gets harder (and pricier) to remove — a yearly rhythm is both cheaper and better-looking than an occasional rescue clean.

Put it on a schedule

The easiest approach is to pick a time each year — many people tie it to spring cleanup — and keep the house on a yearly rhythm, with the roof and driveway folded in as needed. Get a free quote and we'll recommend a cadence based on your specific home and how much shade it sits in.