The fastest way to clean a patio depends on what it's made of

A garden hose with a spray nozzle works for light dirt and leaves on most patios. For stubborn stains, bird droppings, or algae, you need either a pressure washer or a stiff brush with a cleaning solution. Concrete and pavers tolerate pressure washers well; natural stone like slate or marble can crack under high pressure, so those need a brush and chemical cleaner instead. The whole job usually takes two to four hours depending on size and how dirty the surface is.

Start by sweeping or blowing off loose debris. This step matters because dirt trapped under water pressure can scratch the surface. Then choose your cleaning method based on what stains you're dealing with and what your patio is made from.

Key Takeaways

  • A pressure washer at 1500 to 2500 PSI works on concrete and pavers but can damage natural stone, which needs a brush and chemical cleaner instead.
  • Concrete stains respond to oxygen-based cleaners or diluted bleach; pavers and stone need gentler solutions like dish soap and water or commercial stone cleaner.
  • Always sweep first to remove loose dirt, and test any cleaning solution on a hidden corner before treating the whole patio.
  • Pressure washers rent for $50 to $90 per day at most hardware stores if you don't own one.

Cleaning concrete patios with a pressure washer

Concrete is durable and handles pressure washers well. Rent or borrow a machine rated between 1500 and 2500 PSI (pounds per square inch). Anything above 3000 PSI can gouge the surface. Fill the tank with water only — the pressure does the work on concrete.

Hold the nozzle 12 inches from the surface and move it in overlapping strokes, the way you'd mow a lawn. Work in sections. Keep the nozzle moving; stopping in one spot can create a divot. Pressure washers are loud and produce a lot of spray, so wear eye protection and closed-toe shoes. Let the patio dry completely before walking on it, which usually takes a few hours on a dry day.

If the pressure washer alone doesn't remove stains, add an oxygen-based cleaner to the water tank (follow the machine's instructions for the ratio). Oxygen-based cleaners work on rust, mold, and organic stains and are safer than bleach for surrounding plants. explore the solution, let it sit for 10 to 15 minutes, then pressure wash it away.

Cleaning pavers and stone with a brush and solution

Pavers made from concrete or clay can handle a pressure washer at the lower end of the range (1500 PSI), but natural stone like slate, limestone, or marble should never go in a pressure washer. The force can crack them and force water into the joints, which weakens the base.

For pavers and stone, use a stiff-bristled deck brush or patio brush and a cleaning solution. Mix one part white vinegar with three parts water for light algae and mold, or use a commercial stone cleaner following the label instructions. Scrub in the direction of the grain if the stone has one. Let the solution sit for 10 minutes on stubborn stains, then scrub again and rinse with a garden hose.

For sealed pavers or stone, check the sealer type first — some sealers are damaged by acidic cleaners like vinegar. If you're unsure, use plain dish soap and water instead. Test any solution on a corner or hidden area first; some cleaners can lighten or darken stone.

Removing specific stains from patios

Mold and algae: These appear as green or black patches, usually in shaded or damp areas. Oxygen-based cleaners work well on concrete. For stone, use a 1:3 vinegar-to-water mix or a commercial algaecide. Brush and let sit for 10 minutes before rinsing.

Rust stains: These show up as orange or brown marks, often from metal furniture or planters. Oxygen-based cleaners are the best choice because they break down rust without damaging the surface. Pressure wash after the cleaner sits for 15 minutes.

Oil and grease: These require a degreaser. For concrete, use a commercial concrete degreaser or a poultice (a paste that draws stains out). Spread the poultice, let it dry completely, then scrape and rinse. For pavers and stone, use a gentle degreaser made for natural stone and scrub with a brush.

Bird droppings and tree sap: Soak the area with water first to soften them, then scrub with a brush. For stubborn sap, use a small amount of rubbing alcohol on a cloth, then rinse thoroughly.

Renting or buying a pressure washer

Most hardware stores and equipment rental shops rent pressure washers for $50 to $90 per day. A basic electric model (1500 to 2000 PSI) is enough for most patios and is lighter to handle than gas models. Gas-powered washers (2500 to 3000 PSI) are more powerful but noisier and harder to start.

If you clean your patio every year or two, renting makes sense. If you plan to clean it more often or have other outdoor surfaces to maintain, buying a used electric pressure washer for $200 to $400 might be worth it. New electric models cost $300 to $600; gas models start around $500.

When you rent, ask the shop to show you how to use it and what PSI setting to use for your patio material. They can also recommend whether to add a cleaning solution and what type.

Drying and sealing after washing

Let your patio dry completely before using it — usually 4 to 8 hours depending on weather and humidity. Wet surfaces are slippery and can damage furniture or planters left on them.

Once dry, consider whether your patio needs sealing. Concrete and pavers benefit from a sealer every 2 to 3 years; it protects against stains and water damage. Natural stone should be sealed if it's in a wet or shaded area where mold grows easily. Sealers are applied with a roller or sprayer and take 24 to 48 hours to cure. Follow the product instructions for your specific patio material.

Frequently Asked Questions

Can I use bleach to clean my patio?

Diluted bleach (1 part bleach to 10 parts water) works on concrete for mold and algae, but it can damage plants nearby and may lighten some pavers. Oxygen-based cleaners are safer for surrounding vegetation and work just as well. Never use bleach on natural stone.

How often should I wash my patio?

Once a year is typical for most patios. If your patio is in a shaded, damp area or under trees, you may need to clean it twice a year to prevent mold and algae buildup. Light sweeping and spot-cleaning between washes keeps it looking better longer.

Will pressure washing damage my patio joints?

High pressure can erode the sand or mortar between pavers if you aim directly at the joints. Keep the nozzle at least 12 inches away and avoid pointing it straight down into the gaps. For pavers with delicate joints, use a brush and solution instead.

What's the difference between oxygen-based and bleach cleaners?

Oxygen-based cleaners use hydrogen peroxide to break down stains and are safer for plants and pets. Bleach kills mold and algae but can damage vegetation and lighten some surfaces. Both work on concrete; oxygen-based is the better choice if you have plants nearby.

Do I need to seal my patio after washing?

Sealing is optional but recommended for concrete and pavers, especially if your patio gets heavy use or is in a wet climate. Sealer extends the time between cleanings and protects against stains. Natural stone in shaded areas benefits from sealing to prevent mold growth.