Your Guide to Cleaning Outdoor Stairs the Right Way

Written by Avoca Search  »  Updated on: April 30th, 2025

Exterior staircases are one of the first things people notice about your home. But they’re also one of the easiest places to forget when it comes to regular cleaning. Over time, dirt, mold, and even algae can build up—making the stairs look old and slippery to walk on. If you’ve ever searched for power washing services near me, you're already on the right track. Whether you're planning to do it yourself or call in the pros, here's everything you need to know.

Why Exterior Staircases Get So Dirty

Your outdoor stairs face all kinds of weather—rain, snow, dust, and sun. As a result, they collect a lot of grime. Here's what usually causes the mess:


  • Moss and algae growth: These thrive in shady, damp areas.
  • Dust and dirt: Wind and foot traffic constantly bring in debris.
  • Stains from leaves and water: Organic matter can leave marks and discoloration.
  • Wear and tear: Over time, materials break down and attract more buildup.

Cleaning them not only makes your home look better, but also keeps your stairs safe and extends their life.


Tools and Supplies You’ll Need

Before you get started, make sure you have everything you need:

  • Pressure washer or garden hose with a strong nozzle
  • Cleaning solution: Choose one designed for the stair material (wood, concrete, etc.)
  • Stiff scrub brush for scrubbing tough areas
  • Protective gloves and safety goggles
  • Non-slip shoes for traction on wet surfaces
  • Plastic sheeting or painter's tape (optional) to protect surrounding plants or walls


Step-by-Step Guide to Clean Outdoor Stairs

Step 1: Inspect and Prepare

Take a good look at your stairs. Are there any cracks, loose boards, or damage? Make minor repairs before cleaning to avoid making problems worse.

Clear the stairs of any furniture, pots, mats, or decorations. Sweep away any loose dirt or leaves.

Step 2: Choose the Right Cleaner

Pick a cleaning solution based on your stair type:

  • Wooden stairs: Use a wood-safe cleaner, preferably biodegradable.
  • Concrete stairs: You can use a stronger cleaner, even one with a degreaser.
  • Stone or brick: Mild detergents or vinegar-based solutions work well.

Always test a small area first to make sure it doesn’t stain or damage the surface.

Step 3: Pre-Wet the Area

Use your garden hose or pressure washer to wet the stairs lightly. This helps loosen dirt and prevents the cleaner from soaking in too quickly.

Step 4: Apply Cleaning Solution

Apply the cleaning solution evenly across the stairs. For stubborn spots, let the solution sit for 5–10 minutes to break down the grime. Use a scrub brush to work it into corners and textured areas.

Step 5: Pressure Wash or Scrub

If you're using a pressure washer, start from the top of the staircase and spray downward. This keeps the dirty water from dripping down onto clean steps. Keep the nozzle moving to avoid streaks or surface damage.

If you're cleaning by hand, scrub with a brush and rinse frequently.

Step 6: Rinse Thoroughly

Make sure all cleaning solution is completely rinsed off with clean water. Leftover soap can make surfaces slippery and may cause streaks.

Step 7: Let It Dry

Allow the stairs to air dry fully before walking on them. Wooden stairs especially need time to dry to prevent rot or mold.


When to Call Power Washing Services

Sometimes, it's best to let the experts handle it. You should consider hiring power washing services near me if:

  • Your stairs are covered in deep stains or layers of algae.
  • You're uncomfortable using a pressure washer.
  • The staircase is large or in poor condition.
  • You want a deeper, faster clean without the hassle.

Professional cleaners have the right tools, eco-friendly products, and experience to make your stairs look like new.


Maintenance Tips to Keep Stairs Clean

  • Clean once or twice a year depending on weather and foot traffic.
  • Trim plants or trees nearby to reduce moisture and shade.
  • Use a sealant on wood or concrete stairs to make cleaning easier next time.
  • Keep debris off with regular sweeping.
  • Check for damage every few months and fix problems early.


FAQs

Q: Can pressure washing damage stairs?

Yes, if the pressure is too high or used incorrectly, it can damage wood, chip paint, or weaken mortar between bricks. Use a lower PSI setting for soft materials.

Q: What’s the safest cleaner for the environment?

Biodegradable cleaners labeled safe for plants and pets are best. Vinegar mixed with water is a natural alternative, though not as strong as commercial options.

Q: How long does it take to clean outdoor stairs?

Depending on size and dirt buildup, it usually takes 1–2 hours. Professionals might do it faster.

Q: What’s the average cost to hire a power washing service?

While it varies, most services charge between $100 and $300 for exterior staircases depending on size and condition.

Conclusion

Cleaning your outdoor staircase doesn’t have to be a difficult chore. With the right tools and a little time, you can make your stairs safe, slip-free, and great-looking again. And when it gets to be too much, remember that Wilhelm Painting & Power Washing can give you a hand and save you a weekend of hard work. Regular cleaning is a simple way to take pride in your home and keep your family safe.


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