Concrete and asphalt driveways look similar from the street, but they're completely different materials. Pressure wash them the same way and you'll either damage the asphalt or waste time being too gentle on the concrete. Here's how to handle each one correctly.

The Quick Answer: PSI Side by Side

Concrete: 2,500-3,000 PSI -- handles high pressure, needs it to cut through embedded dirt
Asphalt: 1,200-1,500 PSI -- softer, petroleum-based surface; high pressure strips the binder
Concrete nozzle: 15-degree (yellow) or 25-degree (green) tip
Asphalt nozzle: 25-degree (green) tip only -- avoid red and yellow on asphalt
Pre-treatment: Degreaser is essential on both surfaces before washing

The surface type changes everything -- pressure, nozzle, timing, and even what chemicals you use. Keep reading for the full technique breakdown on each.

Why Asphalt Needs Much Lower Pressure

Concrete is a hard, mineral-based material. It can take a beating. Asphalt is different -- it's made from aggregate and petroleum binder. That binder is what holds the driveway together, and high-pressure water strips it away.

Once you erode the binder, the surface starts to look rough and pitted. Small stones loosen. The driveway becomes more porous, which makes it absorb oil stains faster. You can cause serious surface damage in a single pass with the wrong setup.

Heat makes this worse. In summer, asphalt softens under direct sun -- sometimes reaching surface temperatures over 120°F. Pressure washing hot asphalt is asking for trouble. Schedule asphalt jobs in the morning or on overcast days, and avoid washing during peak afternoon heat.

Concrete Pressure Washing Technique

Concrete can handle serious pressure, but you still need the right technique to avoid striping.

Apply degreaser first. Especially around garage entrances and tire tracks. Let it dwell 5-10 minutes. This does the chemical work so the pressure washer doesn't have to compensate.
Use a surface cleaner attachment. For driveways bigger than 200 sq ft, a surface cleaner is worth its weight. It eliminates the zebra stripes you get from a wand and cuts job time in half. Run it at 2,500-3,000 PSI.
If using a wand: 15-degree (yellow) nozzle at 12-18 inches from the surface. Keep your passes overlapping and at a consistent speed. Don't slow down -- consistent movement prevents light and dark stripes.
Rinse from high to low. Work toward a drain or off the driveway edge so dirty water doesn't flow back over clean sections.

A standard 2-car concrete driveway (400-600 sq ft) takes 20-30 minutes with a surface cleaner. Budget another 10-15 minutes for pre-treatment and rinse.

Asphalt Pressure Washing Technique

With asphalt, your goal is to clean without grinding. Lower pressure means the detergent has to do more of the heavy lifting.

Sweep first. Clear loose gravel, dirt, and debris with a broom before you start. Blasting grit into the asphalt at pressure grinds it in.
Pre-treat with degreaser. This is non-negotiable on asphalt. Oil stains don't come out with water pressure alone -- you need chemical breakdown first. Apply, let it work 10 minutes, then scrub lightly if needed.
Set your machine to 1,200-1,500 PSI. If your machine doesn't go that low, switch to the green 25-degree nozzle and back up your distance to compensate.
Hold the nozzle 8-12 inches from the surface. Angle the wand slightly so the spray pushes debris forward rather than blasting straight down. Keep moving -- don't linger.
Never use a 0-degree (red) tip. It will carve a groove in a single pass. The 25-degree green tip is your only option for asphalt.
Rinse with low pressure. A final clean-water rinse clears detergent residue and reveals the result.

Expect a 400-600 sq ft asphalt driveway to take 30-45 minutes. The lower pressure means slower removal -- plan for more time than a comparable concrete job.

Oil Stains: Pre-Treatment Is the Real Work

Pressure alone won't remove oil on either surface. You need the right pre-treatment matched to the stain.

Fresh oil (under 72 hours): Cover with kitty litter or baking soda, let sit 1-2 hours, sweep, then apply degreaser.
Old oil stains (weeks or months): Commercial degreaser (Zep Heavy-Duty or similar), let dwell 10-15 minutes, scrub with a stiff brush, then pressure wash.
Very old stains on concrete: Muriatic acid solution (1 part acid, 10 parts water) will lift what degreaser can't. Wear gloves and eye protection. Rinse thoroughly. Do NOT use acid on asphalt -- it dissolves the binder.

Charge extra for heavy oil stain work. Standard driveway pricing assumes routine grime. Stain removal is a separate service -- add $0.10-$0.20/sq ft or a flat upcharge of $50-$100 depending on severity.

Sealing After the Wash (The Upsell)

Both surfaces benefit from sealing, but the timeline and product differ.

Concrete: Wait 24-48 hours after washing before applying sealer. Penetrating sealers last 3-5 years. Topical acrylics last 1-3 years. Charge $0.10-$0.30 per sq ft on top of the wash price.

Asphalt: Seal coating is a regular maintenance service -- most asphalt should be sealed every 2-3 years. Wait 24-48 hours post-wash. Charge $0.50-$1.00 per sq ft for seal coating. On a 600 sq ft driveway, that's $300-$600 added to the job.

For more detail on concrete sealing options, see our guide on sealing concrete after pressure washing.

Pricing: Concrete vs Asphalt

Driveway pressure washing typically runs $0.10-$0.20 per square foot for standard jobs. Asphalt can justify slightly higher rates because of the extra care required:

Concrete driveway (400-600 sq ft): $80-$120 cleaning only
Asphalt driveway (400-600 sq ft): $100-$150 cleaning only
Heavy oil stain removal add-on: +$50-$100 per job
Concrete sealing add-on: +$0.10-$0.30/sq ft
Asphalt seal coating: +$0.50-$1.00/sq ft
Minimum charge: $100-$150 regardless of size

For the full breakdown of driveway and surface pricing, check the complete pressure washing pricing guide.

Bottom Line

Know your surface before you start. Concrete takes 2,500-3,000 PSI and a surface cleaner. Asphalt needs 1,200-1,500 PSI, the green tip, and chemical pre-treatment to do the heavy lifting. Get these backwards and you'll either leave the job half-done or leave the customer with damage they'll bill you for.

If you want customers to get instant quotes for driveway cleaning right on your site, try QuoteSnap for free. Set your rates once, and the calculator handles the pricing conversations for you.

Pressure Washing Concrete vs Asphalt: Techniques and PSI Guide (2026)