How To Remove Mold And Mildew With Pressure Washing?

Mold and mildew are common nuisances that can appear on various surfaces around your home, such as siding, decks, driveways, and fences. Not only do they look unsightly, but they can also pose health risks and deteriorate the integrity of the affected surfaces. Fortunately, pressure washing Marietta GA is an effective method for removing mold and mildew, restoring the beauty of your property, and maintaining a healthy environment. In this comprehensive guide, we will discuss how to remove mold and mildew with pressure washing, step by step.

Understanding Mold And Mildew

Mold and mildew are types of fungi that thrive in damp, humid, and shaded areas. They typically appear as black, green, or brown spots or patches on surfaces. While they may seem harmless, mold and mildew can cause respiratory problems, allergies, and other health issues, making their removal crucial for a safe and healthy living environment.

Safety Precautions

Before you start pressure washing to remove mold and mildew, it’s essential to prioritize safety. 

  • Wear appropriate safety gear, including goggles, gloves, and a long-sleeved shirt, to protect yourself from water and cleaning solutions.
  • Use a pressure washer with the appropriate PSI (pounds per square inch) and nozzle to avoid damaging the surfaces you’re cleaning.
  • Ensure that the surrounding area is clear of people, pets, and fragile objects to prevent accidents.
  • Be cautious when working on elevated surfaces and use proper safety equipment, such as ladders and harnesses.

Preparing Your Pressure Washer

Choose The Right Pressure Washer: Select a pressure washer with enough power to remove mold and mildew effectively. For most residential applications, a pressure washer with a PSI between 1,500 and 3,000 is sufficient. Higher PSI may be required for tougher jobs.

Gather The Necessary Equipment: Besides the pressure washer, gather the following equipment and materials:

  • Cleaning Solution: You can use a commercial mildew and mold cleaner or make your own using a mixture of water, bleach, and detergent (follow the manufacturer’s instructions for proportions).
  • Safety Gear: As mentioned earlier, wear safety goggles, gloves, and appropriate clothing.
  • Inspect The Pressure Washer: Before use, inspect the pressure washer for any damage or leaks. Ensure that the hoses and connections are secure. If you find any problems, fix them before moving on.

The Pressure Washing Process

Clear The Area: Remove any furniture, decorations, or obstacles from the area you plan to pressure wash. This will give you a clear and safe working space.

Pre-Treat The Mold And Mildew: Apply the cleaning solution to the affected areas. Be sure to follow the manufacturer’s instructions or the proportions you’ve mixed. Allow the solution to sit for 10-15 minutes to penetrate the mold and mildew.

Connect The Pressure Washer: Attach the garden hose to the pressure washer and connect it to a water source. Make sure the water supply is sufficient to avoid damaging the pressure washer’s pump.

Adjust The Nozzle: Use the appropriate nozzle tip for the job. For mold and mildew removal, a 25- or 40-degree nozzle is usually suitable. Start with a wider angle and adjust if needed to avoid damaging the surface.

Start Pressure Washing: Begin pressure washing by holding the wand at a slight angle and working in even, overlapping strokes. Start from the top and work your way down to ensure that the cleaning solution and dirt are washed away.

Maintain A Safe Distance: Keep the nozzle at a safe distance from the surface you’re cleaning, typically around 12-18 inches. Getting too close can damage the surface.

Consistent Pressure: Maintain consistent pressure while moving the wand back and forth. Avoid staying in one spot for too long, as this can damage the surface.

Rinse Thoroughly: After pressure washing, thoroughly rinse the cleaned areas with clean water. This will remove any remaining cleaning solution and debris.

Repeat As Needed: In some cases, especially for heavily infested areas, you may need to repeat the pressure washing process to completely remove all mold and mildew.

Post-Cleaning Inspection: After completing the pressure washing, inspect the cleaned areas to ensure that all mold and mildew have been removed. If any spots remain, you can spot-treat them or repeat the process.

Maintenance And Prevention

Once you’ve successfully removed mold and mildew with pressure washing Atlanta, it’s important to take steps to prevent their return:

Improve Ventilation: Ensure that the affected areas have adequate ventilation to reduce moisture levels and discourage mold and mildew growth.

Regular Cleaning: Schedule regular pressure washing sessions to prevent mold and mildew from reappearing. Annual or semi-annual cleaning can be effective in maintaining a mold-free environment.

Sealing And Coating: Consider applying a protective sealant or coating to surfaces prone to mold and mildew growth, such as decks and fences. This will make it more difficult for mold to take hold.


Pressure washing is an effective method for removing mold and mildew from various surfaces around your home. By following the safety precautions and step-by-step process outlined in this guide, you can restore the beauty of your property and create a healthier living environment. Regular maintenance and prevention efforts will help ensure that mold and mildew stay at bay, allowing you to enjoy a clean and mold-free home.