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OBE Builders

How to Remove Stubborn Stains with Pressure Washing

  • pressurewashinggur6
  • Mar 16
  • 3 min read

Stubborn stains on driveways, patios, siding, and decks can be frustrating. Whether it's oil spills, rust, mold, algae, or graffiti, these stains can diminish your property’s curb appeal and even cause long-term damage if left untreated. Fortunately, pressure washing is an effective solution for removing tough stains and restoring surfaces to their original condition.

In this guide, we'll walk you through how to remove stubborn stains with pressure washing, the best techniques, and common mistakes to avoid.



Understanding Stubborn Stains

Before jumping into pressure washing, it's important to understand the types of stains you may encounter and how to tackle them effectively.

1. Oil and Grease Stains

  • Common on driveways and garages, oil and grease stains can penetrate deep into concrete.

  • Requires hot water pressure washing and a degreaser.

2. Rust Stains

  • Caused by metal furniture, iron in water, or fertilizer spills.

  • Best removed with oxalic acid-based cleaners and medium-pressure washing.

3. Mold, Mildew, and Algae

  • Frequently found on siding, patios, and decks.

  • Requires soft washing with bleach solution to kill spores.

4. Graffiti and Paint Stains

  • Spray paint can be stubborn on concrete and brick.

  • A combination of pressure washing and chemical removers is ideal.

5. Hard Water Stains

  • White, chalky deposits left by evaporated water.

  • Best treated with vinegar solutions and light pressure washing.


Step-by-Step Guide to Removing Stubborn Stains with Pressure Washing

Step 1: Prepare the Surface

  • Remove debris like leaves and dirt using a broom or blower.

  • Cover nearby plants and electrical outlets with plastic sheets.

  • Pre-wet the surface to prevent cleaner absorption.

Step 2: Choose the Right Pressure Washer

  • Gas vs. Electric: Gas-powered washers are more powerful, while electric ones are better for light-duty cleaning.

  • PSI & GPM:

    • Light stains: 1500-2000 PSI

    • Medium stains: 2000-2800 PSI

    • Heavy-duty stains: 2800+ PSI

Step 3: Apply the Right Cleaning Solution

  • Use a pressure washer-compatible detergent or degreaser.

  • For organic stains (mold, mildew, algae), use a bleach mixture.

  • Let the solution sit for 5-10 minutes before washing.

Step 4: Use the Correct Nozzle and Technique

  • 25-degree nozzle (green) for general cleaning.

  • 15-degree nozzle (yellow) for tough stains.

  • Turbo nozzle for extreme grime and stains.

  • Keep the nozzle 12-18 inches from the surface.

  • Work in even, overlapping strokes to avoid streaking.

Step 5: Rinse and Inspect the Surface

  • Use clean water to rinse off detergent and loosened stains.

  • Inspect for any remaining stains and repeat the process if necessary.


Common Pressure Washing Mistakes to Avoid

  1. Using Too Much Pressure

    • High pressure can damage siding, wood, and even concrete.

  2. Skipping Pre-Treatment

    • Some stains need a detergent soak before washing.

  3. Holding the Nozzle Too Close

    • Can cause streaks and uneven cleaning.

  4. Ignoring Protective Gear

    • Always wear gloves, goggles, and closed-toe shoes.

  5. Pressure Washing Painted Surfaces Incorrectly

    • Use a low-pressure setting to avoid peeling paint.

Maintaining a Stain-Free Surface

  • Seal driveways and decks to prevent future stains.

  • Clean spills immediately to prevent deep stains.

  • Schedule regular pressure washing for maintenance.


FAQs About Pressure Washing Stubborn Stains

1. Can pressure washing remove oil stains from concrete?

Yes, but you’ll need a degreaser and hot water pressure washing for best results.

2. Will pressure washing damage my siding?

Not if you use the correct nozzle and pressure settings. Soft washing is recommended for delicate surfaces.

3. What is the best way to remove mold and mildew with a pressure washer?

Use a bleach solution (1:10 ratio with water) and a low-pressure setting to kill and remove spores effectively.

4. How do I prevent streaks when pressure washing?

Use consistent, overlapping strokes and avoid keeping the nozzle too close to the surface.

5. Can I pressure wash wood surfaces like decks?

Yes, but use a wide-angle nozzle and lower pressure (1500-2000 PSI) to avoid damage.


Conclusion

Pressure washing is a powerful tool for removing stubborn stains, restoring your property’s appearance, and maintaining long-term cleanliness. By following the right techniques, choosing the correct pressure washer settings, and avoiding common mistakes, you can effectively tackle even the toughest stains.

For professional pressure washing services in Texas, Pressure Washing Guru LLC is here to help. Contact us today for a free estimate!


Contact Us for Your Pressure Washing Service in Terrell

Company Name: Pressure Washing Guru LLC

Address: 14827 Co Rd 234, Terrell, TX 75160, United States

Phone: +1 2146827819

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