How Often Should You Pressure Wash Your Houston Home? (2026 Schedule)

Most national pressure washing guides will tell you to clean your home every 1 to 2 years. That advice is fine for Phoenix or Denver. In Houston, where humidity hovers at 75% year-round, pollen coats every surface in spring, and afternoon thunderstorms run nine months out of the year, that schedule is barely adequate. Some surfaces on your home need attention twice as often.

Here is the Houston-specific cleaning calendar we use with our customers, broken down by surface and informed by seven years of working in this exact climate.

The Quick Answer

For a typical single-family home in the Houston metro area:

• Driveway and concrete: Every 12 months
• House siding (vinyl or Hardie): Every 12 to 18 months
• Roof soft wash: Every 18 to 24 months
• Wood fence: Every 12 to 18 months
• Wood deck: Every 12 months
• Gutters: Twice a year (spring and fall)

That's the baseline. Properties with heavy tree cover, properties closer to Buffalo Bayou or the Gulf, and properties in older neighborhoods like The Heights or Montrose typically need cleaning more often. Neighborhoods like The Woodlands, Cypress, and Spring with newer Hardie board construction can sometimes stretch the timeline a bit longer.

Why Houston Is Different

Three things make Houston tougher on home exteriors than almost any other major US city:

1. Humidity

Houston averages 75% relative humidity year-round, with morning readings often above 90%. That moisture creates the ideal environment for mold, mildew, and algae growth. We covered the science in detail in our Houston humidity guide. The short version: organisms grow on your home every day of the year, not just spring and summer.

2. Pollen

Live oak catkins drop in March and April. Pine pollen follows in May. Pecan pollen runs through June. Ragweed kicks in by August. Nearly every Houston home gets coated in a yellow-green dust at least four months out of the year, and that organic material feeds the mold growth for months afterward. Read our tree pollen damage guide for the full breakdown.

3. Storms

Houston gets an average of 105 thunderstorm days per year. Each storm deposits debris, runoff, and standing water against siding, fences, and concrete. Hurricane season (June through November) compounds the problem. After a major storm event, even a recently-cleaned home can look weather-beaten within weeks.

Surface-by-Surface Schedule

Driveways and Concrete: Every 12 Months

Houston driveways pick up four kinds of stains that need annual attention:

• Algae and mold from humidity and rain
• Iron staining from clay soil tracked by foot or tire
• Oil and tire marks from vehicles
• Organic debris from pollen and falling leaves

Wait longer than 12 months and the stains start to set permanently into the porous concrete. The fix is still possible at 18 or 24 months but takes longer and costs more. Annual cleaning keeps the surface easy to maintain. See our driveway cleaning page for what's included.

House Siding: Every 12 to 18 Months

Vinyl, Hardie board, and brick all collect mildew, dirt, and algae streaks at about the same pace in Houston. The visible signs that you've waited too long:

• Green or black streaks running down from the roof line
• A "dirty" cast on the north-facing walls (the side that gets the least sun)
• Spider webs and mud dauber nests building up under eaves
• Visible mildew where the siding meets concrete

Stick to a 12-month cycle if you have lots of trees, especially live oaks or pines. Push it to 18 months if your home is in a newer subdivision with limited canopy. Our house washing service uses soft wash methods that are safe for every Houston siding type.

Roof: Every 18 to 24 Months

The black streaks on Houston roofs are caused by Gloeocapsa magma bacteria, which feeds on the limestone filler in asphalt shingles. The bacteria grows slowly. Once you treat it with a soft wash, you have 18 to 24 months before it returns.

Letting it go longer doesn't just look bad. The bacteria retains moisture against the shingle, accelerates granule loss, and shortens the life of your roof. A $400 soft wash every two years can extend a $15,000 roof replacement by 5 to 7 years. The math works.

Critical: Never let anyone pressure wash your Houston roof. Soft wash only. Read our soft wash vs pressure wash guide for why this matters.

Wood Fences: Every 12 to 18 Months

Cedar and pine fences in Houston develop a gray, weathered appearance within 12 months due to UV damage and mildew growth. A soft wash with a wood-safe detergent restores the original color and adds years to the fence's life.

If you stain or seal your fence after cleaning (we recommend it), you can stretch the cycle to 18 to 24 months. Untreated wood fences should be cleaned annually.

Wood Decks: Every 12 Months

Decks take more abuse than fences because they get walked on, rained on, and exposed to direct sun all at once. Mildew and mold colonize the boards from above and below. Annual cleaning is the minimum. Some Houston homeowners with shaded decks need to clean twice a year.

Gutters: Twice Per Year

Houston tree pollen and falling leaves clog gutters fast. Clean once in spring (after pollen season) and once in fall (after leaf drop). Clogged gutters lead to overflow, which causes the brown and green streaks you see running down siding from the roof line.

Properties That Need More Frequent Cleaning

Some Houston properties need a tighter schedule than the baseline. You probably need more frequent cleaning if:

• Your home is shaded by mature live oaks or pines
• You back up to a wooded greenbelt or bayou
• You have a swimming pool (chlorine + humidity accelerates algae)
• Your driveway is north-facing (less sun = more mildew)
• Your home is older than 20 years (older paint and caulk hold dirt more)
• You have visible mildew or stains less than 6 months after the last cleaning
• You live in an HOA neighborhood with strict appearance standards

For these properties, we typically recommend a full property cleaning twice a year (spring and fall) with spot cleaning between visits as needed.

Best Time of Year to Schedule

Houston's climate creates two ideal cleaning windows:

Late October to Early December

This is the best time for an annual property clean. Hurricane season is over, summer humidity has dropped slightly, and pollen season is months away. Cleaning now removes the entire summer's accumulation and gives your home a clean baseline going into winter.

Late February to Early April

The second-best window. This is the time to clean before live oak and pine pollen season starts. Cleaning now removes winter buildup and prepares surfaces to shed pollen more easily.

Worst time to schedule: July and August. Daily afternoon thunderstorms make scheduling unreliable, and any cleaning will get re-soiled within weeks. Read our full best time to pressure wash Houston guide for a month-by-month breakdown.

Signs You've Waited Too Long

If you're not sure whether your home needs cleaning, look for these warning signs:

• Green or black streaks visible from the curb
• Roof shingles look stained or discolored
• Concrete looks gray and lifeless instead of clean white
• Wood fence or deck has gone from brown to gray
• You can write your name in the dust on your siding
• Cobwebs and bug nests under every eave
• Slippery walkways after rain
• Moss or lichen growing on the north side of the house

Two or more of these signs means it's time to schedule a cleaning. All seven means you've waited at least a year too long.

What This Costs Annually in Houston

Real Houston pricing for an annual maintenance program on a typical 2,500-3,000 sq ft single-family home:

• Driveway cleaning: $175 to $275
• House soft wash: $375 to $550
• Roof soft wash (every 2 years): $400 to $600
• Fence cleaning: $200 to $400
• Gutter cleaning (2x per year): $200 to $300

Annual total: $950 to $1,500 per year for full property maintenance.

Many Houston homeowners save 15 to 20% by bundling everything into a single visit. We offer a maintenance plan that schedules these services automatically so you never have to think about it. See our Houston pressure washing cost guide for the full pricing breakdown.

Frequently Asked Questions

Can I just spray my home with a garden hose to keep it clean?

No. A garden hose tops out around 50 PSI, which won't remove biological growth that has rooted into pores. You can rinse off loose dirt, but mold, mildew, and algae need either chemistry (soft wash) or pressure (pressure wash) to actually kill and remove.

Will pressure washing damage my Houston home?

Not when done correctly by a professional. The risk comes from wrong-pressure techniques (high pressure on roofs or siding) or wrong-direction techniques (spraying into gaps and joints). We use surface-appropriate methods on every job. Read our soft wash vs pressure wash guide for details.

Should I clean my home before or after a hurricane?

Both. Clean in May or early June before hurricane season, and again in October after storm season ends. This gives you the cleanest baseline going into and coming out of the worst weather months. See our hurricane season home prep guide for more.

Is once a year really enough?

For most Houston homes, yes, but only if you do a complete property clean each time. A partial cleaning (just the driveway, just the house) means the parts you skipped go 24+ months between cleanings, which is too long for our climate.

Can I schedule on a maintenance plan?

Yes. ProTouch PowerWash offers automatic annual and bi-annual maintenance plans for Houston homeowners. We schedule the visits, you don't have to remember. Plans start at $79 per month for full property service. Call (713) 555-0238 to set one up.

What if I just bought my house? How do I know when it was last cleaned?

Get a baseline cleaning within 30 days of moving in, regardless of how the home looks. This gives you a clean starting point and lets us identify any issues with the previous owner's maintenance. After the baseline, follow the standard schedule.

Need a Houston cleaning schedule for your property? Call ProTouch PowerWash at (713) 555-0238 or request a free quote online. We'll walk your property, recommend a schedule based on your specific situation, and offer flat-rate pricing on every service.