By Ken McClary
One of the most common questions I get from homeowners in Rogers, Bentonville, and across Northwest Arkansas is simple: how often should I pressure wash my house? The short answer is at least once a year. But living here in NWA, there are some local factors that can change that timeline.
I've been washing homes across Northwest Arkansas for years, and I've seen what happens when people wait too long. What starts as a little green tint on the north side of a house turns into a full layer of algae, mold, and mildew that's harder to remove and can actually damage your siding over time.
The General Rule: Once a Year
For most homes, an annual pressure wash - or more accurately, a soft wash - is enough to keep your exterior looking great. This removes the buildup of dirt, pollen, algae, and other organic growth before it has a chance to cause long-term staining or damage.
I usually recommend scheduling your house wash in the spring, after the worst of the pollen has settled but before summer humidity kicks algae growth into high gear. That said, any time between March and November works well here in Arkansas.
Why NWA Homes Need It More Than Most
Northwest Arkansas has a climate that's practically designed to make your house dirty. Here's what we're dealing with:
- High humidity: Our summers are hot and humid, and that moisture creates the perfect breeding ground for algae, mold, and mildew. The north and east sides of homes - the sides that get the least sun - tend to be the worst.
- Heavy pollen seasons: If you've lived here through a spring, you know what I'm talking about. Everything gets coated in a yellow-green layer of pollen from the trees. That pollen sticks to siding, soffits, and gutters.
- Red clay soil: Arkansas is known for its red clay, and after a good rain, that reddish-brown splash-back ends up on your foundation, lower siding, and walkways.
- Tree cover: A lot of NWA neighborhoods have mature trees, which is great for shade but also means more organic debris, sap, and shade-loving algae on your home.
Because of these factors, some homes in our area - especially those surrounded by trees or on the shaded side of a hill - benefit from washing every 8 to 10 months rather than a strict once-a-year schedule.
Signs Your House Is Overdue for a Wash
Not sure if it's time? Here are the telltale signs I look for when I visit a property:
- Green or black streaks on your siding, especially on the north-facing walls
- Dark staining under the eaves or around gutters
- A dull, faded look to what used to be bright siding
- Visible dirt lines where water runs down from the roof
- Cobwebs and wasp nests collecting in corners and under overhangs
- Neighbors' homes look noticeably cleaner than yours
If you're seeing any of those, it's time. And the longer you wait, the harder - and more expensive - the job becomes. Algae that's been sitting for two or three years gets embedded in the pores of vinyl and into the grain of wood. A fresh annual wash comes off easy.
Different Surfaces, Different Schedules
Your house isn't the only thing that needs regular cleaning. Here's a quick guide for the other surfaces around your property:
- Driveways and sidewalks: Every 1 to 2 years, depending on traffic and staining. Oil spots and tire marks build up fast on concrete.
- Decks and patios: Annually, especially wood decks. Moisture and shade cause wood to develop algae and can lead to slippery, unsafe conditions.
- Fences: Every 1 to 2 years. Wood fences in NWA go gray and green surprisingly fast.
- Roofs: Only when you see dark streaks (those are caused by Gloeocapsa magma, a type of algae). Soft washing only - never high pressure on a roof.
When Is the Best Time of Year?
In Northwest Arkansas, spring is the sweet spot. Late March through May gives you a clean slate heading into summer, when your family is spending the most time outside and when you're most likely to have guests over. Fall is another solid option - clean things up before the holidays and before winter moisture sets in.
I'd avoid washing in the dead of winter. Freezing temperatures can be a problem for both the equipment and the cleaning solutions, and surfaces don't dry properly when it's cold. For more on seasonal timing, check out my guide on the best time to pressure wash in NWA.
The Bottom Line
If you're a homeowner in Northwest Arkansas, plan on washing your house at least once a year. It protects your investment, keeps your home looking sharp, and prevents small problems from turning into expensive repairs. I've seen siding that had to be replaced because mold was left unchecked for years. A yearly wash is a whole lot cheaper than new siding.
If you're anywhere in NWA, I'd be happy to take a look and give you an honest assessment. I offer house washing and soft washing across the region - check out my services in Rogers, Bentonville, Springdale, or Fayetteville, or just reach out for a free quote.
- Ken McClary, Wash NWA
(479) 426-7006
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