How Often Should You Wash Your House in Georgia's Humidity?

There's no single "every X months" answer that fits every home — a house baking in full sun on an open lot and a house tucked under oaks on a shaded street age very differently. But there's a simple way to think about it that works for the Columbus area, where heat and humidity keep organic growth active most of the year.

The general rule: about once a year

For most Columbus-area homes, a full house wash roughly once a year keeps siding, soffits, and trim ahead of algae and grime. The best window is late spring, after the heavy pollen has dropped and before summer humidity accelerates growth — more on that timing in our guide to pollen and algae season.

What makes a home need it more (or less) often

• Shade and trees: shaded, north-facing walls and homes under heavy tree cover hold moisture and grow algae faster — these may want attention every year or a mid-year touch-up.
• Sun and open lots: sunny, well-ventilated homes dry quickly and can often stretch to every 18–24 months.
• Nearby water or sprinklers: constant moisture from irrigation or a pond speeds growth on the walls it hits.
• Surface type: textured surfaces hold onto pollen and spores more than smooth ones.

Signs it's time — regardless of the calendar

Your house will tell you before a schedule does. Look for:

• A green, gray, or black tint creeping up siding, especially on the shady side
• Dark streaks on the roof (that's roof algae — treated gently, never with pressure)
• Cobwebs, wasp nests, and mud daubers collecting in corners and eaves
• Concrete looking darker or feeling slick underfoot

Don't forget the surfaces that aren't siding

"How often should I wash the house" usually really means the whole exterior. A practical yearly rhythm: one house wash in late spring, a driveway and concrete refresh once or twice a year, and a quick check of shaded roof slopes each summer. Staying on a light, regular schedule is far easier — and gentler on your home — than waiting until it looks bad and needs heavy treatment. Not sure where your home falls? A few photos through the quote path is enough to get a straight answer on timing.