At RDU Pressure Pros, we know how frustrating mold removal can be when it comes to your home’s exterior. Getting rid of mold isn’t just about keeping your home looking good—it also helps prevent slippery surfaces and long-term damage. Mold and mildew thrive in damp, shaded spots, feeding on moisture and buildup from dirt and leaves. If you don’t deal with them early, they can spread fast and become tougher to remove.
This is where pressure washing comes in. Instead of spending hours scrubbing, a pressure washer blasts away mold, mildew, and grime in minutes. It not only cleans the surface but also helps prevent mold from coming back, keeping your outdoor spaces looking fresh and well-maintained. To help you get the best results, we’ve put together this blog with everything you need to know about effective mold removal using pressure washing.
Understanding Mold & Mildew Growth
Many people lump mold and mildew together, but they’re actually different. Mildew is more of a surface issue—it’s usually white or gray and easier to wipe away. Mold, on the other hand, digs in deeper, comes in darker colors like black or green, and can cause long-term damage if it’s not removed properly. Both thrive in damp conditions, but mold is much tougher to get rid of.
So, what causes mold and mildew to show up in the first place? Moisture, lack of sunlight, and organic buildup like dirt and leaves are the main culprits. If an area stays damp for too long—whether it’s a shady corner of your deck, a fence that doesn’t dry out, or a driveway covered in debris—you’ll likely see mold and mildew start creeping in.
Certain outdoor surfaces are especially prone to mold and mildew buildup, like driveways, decks, siding, and fences. These areas deal with rain, humidity, and poor airflow, making them the perfect breeding ground. Left untreated, mold can lead to ugly stains and wood rot and even make surfaces dangerously slippery.
Why Choose Pressure Washing for Mold Removal?
Getting rid of mold can be frustrating, but pressure washing makes the job much easier. Instead of scrubbing for hours or using strong chemicals, a pressure washer blasts away mold, mildew, and grime with high-powered water. It reaches deep into cracks and textured surfaces, cleaning areas that other methods often miss.
Why Pressure Washing Works So Well
- Deep Cleaning: The force of the water removes mold at its source, so it doesn’t grow back as quickly.
- Prevents Regrowth: It washes away mold spores and the dirt they feed on, helping to keep surfaces cleaner for longer.
- Eco-Friendly: Unlike harsh chemicals, pressure washing mostly relies on water, making it a safer option for your home, pets, and the environment.
How It Compares to Other Mold Removal Methods
There are a few different ways to tackle mold, but pressure washing is often the most effective:
- Scrubbing with Soap & Water: It works for small spots but is tiring and doesn’t always remove mold completely.
- Chemical Cleaners: These can kill mold, but some products contain harsh ingredients that might damage surfaces or be harmful to breathe.
- Pressure Washing: Quickly cleans large areas, removes mold deep in the surface, and avoids excessive chemical use.
If you want a fast, powerful, and eco-friendly way to remove mold, pressure washing is the way to go. It not only makes your home look better but also helps protect it from long-term mold damage.
Steps for Effective Mold Removal With Pressure Washing
Pressure washing is a great way to get rid of mold, but doing it the right way matters. If you’re not careful, you could damage your surfaces instead of cleaning them. To get the best results, follow these steps.
1. Preparation:
A little prep work can make a big difference. Before you start, gather the right tools and take the necessary safety precautions:
- Wear protective gear: Gloves, safety goggles, and a mask can help protect you from mold spores.
- Inspect the surface: Check for cracks, loose paint, or weak areas that high pressure might damage.
- Choose the right nozzle: A 25-degree (green) nozzle is great for general cleaning, while a 15-degree (yellow) nozzle works well for tougher mold stains.
2. Apply a Cleaning Solution
While pressure washing alone can remove mold, using an eco-friendly detergent helps break it down more effectively.
- Look for biodegradable mold removers that are safe for plants and pets.
- Let the solution soak for 5-10 minutes to loosen up the mold before washing.
- Avoid using bleach, as it can harm some surfaces and kill surrounding grass or plants.
3. Pressure Washing Technique
Not all surfaces can handle the same level of pressure, so adjusting it properly is key to avoiding damage. Too much pressure can crack siding or splinter wood, while too little might not completely remove the mold. Here’s a quick guide to help you set the right pressure for different surfaces:
- Concrete driveways and sidewalks: Tough enough for higher pressure, around 2,500–3,000 PSI.
- Wood decks and fences: Use lower pressure of around 1,500–2,000 PSI to avoid splintering.
- Vinyl siding: Keep pressure around 1,300–1,600 PSI and angle the spray downward to keep water from seeping behind the siding.
Finally, move the spray in long, even strokes to avoid streaks or uneven cleaning, keeping a consistent distance from the surface.
4. Post-Wash Treatment: Keep Mold From Coming Back
Once you’ve got the surface clean, use post-wash treatment to prevent mold from coming back. How? Keep the area dry, improve airflow, and consider applying a protective sealant to help stop it from growing again.
- Improve drainage: Clear gutters and downspouts to prevent excess moisture buildup.
- Trim back vegetation: Allow more sunlight to reach surfaces, reducing damp areas where mold thrives.
- Apply a mold-resistant sealant: On decks, fences, or siding, this can help protect against future growth.
By following these steps, you’ll remove mold effectively and keep your home looking cleaner for longer.
DIY vs. Professional Power Washing for Mold Removal
When it comes to mold removal, you might wonder if you should tackle it yourself or call in the pros. The answer depends on the size of the problem, the type of surface, and how much time and effort you’re willing to put in.
When DIY Gets the Job Done
If you’re dealing with a small patch of mold on a driveway, deck, or siding, a DIY approach can work just fine. A household pressure washer, the right cleaning solution, and a bit of patience can take care of light mold growth without much trouble. Just make sure you use the correct pressure settings to avoid damaging your surfaces.
When to Call in the Pros
Some mold problems are just too big or too risky to handle on your own. It’s best to hire professionals when:
- The mold covers large areas or has deeply penetrated porous surfaces.
- You’re dealing with delicate materials like painted wood, stucco, or old brick that require a careful touch.
- You don’t have the time, tools, or experience to get the job done safely and effectively.
Cost vs. Time: Is It Worth Doing It Yourself?
While DIY power washing can save money upfront, it also takes time and effort—and if done incorrectly, it could lead to costly damage. Hiring a professional ensures the job is done right, often in a fraction of the time, with commercial-grade equipment and expert techniques. If you’re unsure, getting a quote from a pressure washing service can help you decide if it’s worth the investment.
Preventing Mold & Mildew After Power Washing
Getting rid of mold with power washing is great, but the real challenge is keeping it from coming back. Mold and mildew thrive in shaded and damp areas, so a few simple steps can help keep your surfaces cleaner for longer.
Stick to a Regular Cleaning Schedule
Don’t wait for mold to take over before you clean again. Giving your driveway, deck, or siding a quick rinse every few months can prevent dirt and moisture from building up—two things mold loves.
Control Moisture & Improve Drainage
Mold needs moisture to grow, so keeping surfaces dry is key.
- Keep gutters and downspouts clean to stop water from accumulating around your home.
- Cut back trees and bushes to increase sunlight exposure and enhance airflow.
- Address any leaks or drainage problems that cause water to collect on patios, sidewalks, or siding.
Use Mold-Resistant Coatings & Sealants
Apply a mold-resistant sealant to decks, fences, and siding after power washing for extra protection. These coatings help prevent moisture from soaking in, making it harder for mold to take hold again. Some exterior paints even have built-in mold resistance, offering long-term protection.
With a little maintenance and moisture control, you can keep mold and mildew from coming back—so you won’t have to break out the power washer again anytime soon!
Conclusion
Mold and mildew don’t just make your home look bad—they can also weaken surfaces and cause long-term damage if ignored. Pressure washing is one of the most effective ways to remove mold, providing a deep clean while also helping to prevent it from coming back. It’s a fast, powerful, and eco-friendly solution compared to harsh chemicals or scrubbing by hand.
If you’re dealing with a small mold problem, a DIY approach might work with the right tools and techniques. But for larger infestations or delicate surfaces, hiring professionals ensures a thorough, safe clean while saving you time and effort.
Don’t wait for mold to spread—contact RDU Pressure Pros today for expert power washing and long-lasting results!
