Should You Pressure Wash or Replace a Stained, Cracked Concrete Driveway?

Edwardsville Power Washing · 2026-08-15

This is a genuinely common fork in the road for older concrete: the driveway or garage floor has years of staining, some pitting, maybe a hairline crack or two, and it's not obvious whether cleaning will actually help or whether you're just delaying a bigger job.

What pressure washing can fix

• Surface staining -- oil drips, tire marks, rust, tannin stains from leaves and mulch. Most of this is cosmetic and sits on top of the concrete rather than in it.
• Algae and mildew film -- the green-black slick that builds up in shaded, damp areas. This comes off cleanly and usually looks dramatically better afterward.
• General grime buildup -- years of dust, pollen, and dirt ground into the surface texture.

What it can't fix

• Deep pitting. If the surface has actual pockmarks from freeze-thaw damage or old de-icing salt, washing will clean the pits but won't fill them back in.
• Structural cracks. Hairline surface cracking is cosmetic; cracks you can fit a coin into, or ones with height differences on either side, are a structural issue washing won't touch.
• Set-in stains. Some stains -- certain rust, some sealers gone wrong -- have penetrated deep enough that cleaning lightens but doesn't fully remove them.

A reasonable way to decide

If the concrete is otherwise sound -- no major cracking, no chunks missing, no persistent puddling from an uneven grade -- cleaning is worth doing first. It's a fraction of the cost of replacement, and on a driveway that's staining-heavy but structurally fine, it can make an old surface look genuinely presentable again.

If you're already getting replacement quotes for other reasons (grading issues, a crumbling edge, matching new pavers going in elsewhere on the property), cleaning probably isn't worth doing first -- you'd be paying twice for the same square footage.

Matching pressure to the surface

One reason a rental pressure washer sometimes makes concrete look worse, not better, is pressure that's too high for the finish. Broom-finish concrete can usually take full strength; stamped or decorative concrete needs the pressure backed off so the texture and color don't get chewed up in the process.