Illustration for Pale Streaks on Your Asphalt Driveway After a House Wash

A homeowner might notice it the next morning. The siding looks great, but there’s a lighter stripe across the drive where the runoff went. It’s a real question on a pressure washing trade forum. One washer posted that wash runoff had left an asphalt drive lighter in color and asked how to fix it.

Why wash runoff can lighten asphalt

Asphalt is softer than concrete, and its color isn’t permanent. One paving company says the sun can bleach blacktop to gray in a few years. Fresh sealcoat needs extra care. An Orlando paving company tells owners not to use cleaners with bleach on a freshly sealcoated drive, because bleach can damage the sealcoat.

That is the kind of damage to worry about if a bleach-based house wash mix runs down a wall onto the driveway. Washers on the forum describe exactly this: a lighter path where the runoff ran. To prevent it, they say they keep the drive wet and rinsed while they work.

How a good crew keeps the wash off the drive

These are practices washers on a trade forum described, not tested rules. They’re fair to ask about before the job:

  • Pre-wet the driveway before any mix goes on the house, so the asphalt isn’t dry and thirsty.
  • Rinse the driveway while the mix dwells on the walls, and again after the house is rinsed.
  • Keep the area wet while the crew works, and rinse the driveway again around the garage.
  • Go slow on shiny black drives. A freshly sealed surface needs the most care.

Ask how they protect your driveway, plants and doors. Our questions to ask a house washing company covers what else to check. If marks show up anyway, our house wash guarantee guide explains how to ask for a call-back, and damage or already there? helps you sort out what the wash caused.

Can asphalt be cleaned at all?

Yes, gently. Washers and paving companies agree that asphalt needs lower pressure than concrete. A Los Angeles company warns that too much pressure can scar the surface or strip the binder that holds it together. One forum washer adds that mud left behind on blacktop can dry into streaks that look like wand marks.

Cleaning removes surface dirt. It won’t restore faded, gray asphalt; a sealer maker says its product renews the look of old worn driveways.

Service (company, area) Published price For a 600 sq ft two-car drive
Asphalt cleaning (iShine Cincy, Cincinnati) $0.12 to $0.20 a sq ft $72 to $120
Asphalt cleaning (J. Fragale & Sons Paving, Connecticut) $0.15 to $0.35 a sq ft $90 to $210
Asphalt cleaning (Twisted Nozzle, Houston) $0.20 to $0.35 a sq ft $120 to $210
Asphalt cleaning (Allbright, Los Angeles) $185 to $220 for 600 sq ft $185 to $220
Sealcoating (Portillo’s Paving, Bay Area) $0.15 to $0.40 a sq ft $90 to $240
Sealcoating (C. Brooks Paving, South Texas) $0.20 to $0.65 a sq ft; $150 to $200 minimums common $120 to $390

Stripes on concrete are a different problem. See driveway stripes after pressure washing.

Sealcoating is the real fix for streaks

If the streaks don’t fade, a sealcoat evens the color. A sealer maker’s data sheet gives the order:

  1. Pressure wash first. Driveways should be pressure washed before sealcoating, and oil spots scrubbed with a degreaser or dish soap.
  2. Seal the whole drive at once. The sheet says to complete the driveway in one continuous application to prevent color shading. Sealing just the pale stripe would likely leave a patch.
  3. Watch the weather. It calls for 15°C (59°F) and rising, and no rain or cold expected within 36 hours.
  4. Wait on new asphalt. Freshly paved drives need at least six months or a full summer before any sealer.

One paving company recommends resealing every two to three years.

Timing in snow country

In Rochester, New York, NOAA’s 1991–2020 normals show about 102 inches of snow a year. The low drops to freezing or below on about 129 days. That leaves a short sealing season, since the sealer needs warm, dry days. If a fall house wash leaves streaks, the fix may have to wait for warmer weather. Our guide to sealing a concrete driveway before winter salt covers concrete, which needs different sealers.

For how we check every number, see our methodology.

Sources

Based on 11 sources · How we price