The Ultimate Guide to Cleaning Your Exterior Concrete with Pressure Washers and Degreasers
- 3 days ago
- 3 min read
Keeping exterior concrete clean not only improves the look of your property but also extends the life of the surface. Dirt, grease, algae, and stains build up over time, making concrete look dull and worn. Using the right tools and cleaning methods can make this task easier and more effective. This guide explains how to clean exterior concrete using a pressure washer, stiff bristled brush, and heavy-duty non-corrosive degreaser, and how often you should do it.
Why Regular Cleaning of Exterior Concrete Matters
Concrete is durable but porous, which means it absorbs dirt, oils, and other contaminants. Over time, these substances can cause stains and promote the growth of mold or algae. Regular cleaning:
Prevents permanent stains
Reduces slip hazards caused by algae or moss
Maintains curb appeal and property value
Extends the lifespan of the concrete surface
Cleaning exterior concrete every 6 to 12 months is a good rule of thumb. High-traffic areas or places exposed to oil spills may need more frequent attention.
Tools You Need for Effective Concrete Cleaning
To clean exterior concrete thoroughly, you will need:
Pressure washer: A machine that sprays water at high pressure to remove dirt and grime. Choose one with at least 3000 PSI for best results on concrete.
Stiff Bristled brush: A stiff-bristled brush helps scrub stubborn stains and areas the pressure washer can’t reach.
Heavy-duty non-corrosive degreaser: This chemical breaks down grease and oil without damaging the concrete or surrounding plants.
Using these tools together ensures a deep clean without harming the surface.
Step-by-Step Cleaning Process
1. Prepare the Area
Clear the concrete surface of furniture, plants, and debris. Sweep loose dirt and leaves away. Cover nearby plants or delicate surfaces with plastic sheeting to protect them from cleaning chemicals.
2. Apply Degreaser
Spray the heavy-duty non-corrosive degreaser on stained or greasy areas. Let it sit for 10 to 15 minutes to break down oils and grime. Avoid letting the degreaser dry on the surface.
3. Scrub with Stiff Bristled Brush
Use the stiff bristle brush to scrub the degreaser into the concrete, focusing on spots with heavy stains or buildup. This manual action helps lift dirt that pressure washing alone might miss.
4. Pressure Wash the Surface
Set the pressure washer to a wide spray nozzle to avoid damaging the concrete. Hold the nozzle about 12 to 18 inches from the surface and spray in a sweeping motion. Work in sections, rinsing away the loosened dirt and degreaser.
5. Rinse and Inspect
After pressure washing, rinse the entire area with clean water. Check for any remaining stains or spots that need extra attention. Repeat scrubbing and washing if necessary. Slight tip for stubborn areas, use a diluted white vinegar and water solution in a spray bottle to spot treat. Adjust the dilution as needed.
Tips for Safe and Effective Cleaning
Always wear protective gear such as gloves and safety glasses.
Test the degreaser on a small, hidden area first to ensure it does not discolor the concrete.
Avoid using acidic or corrosive cleaners that can etch or damage the surface.
Do not use a pressure washer with too high pressure or hold it too close, as this can cause surface damage. Maintain an even distance when pressure washing to ensure an even clean from start to finish.
Work on a dry day with no rain forecast to allow the concrete to dry properly after cleaning.
How Often Should You Clean Exterior Concrete?
The frequency depends on the location and use of the concrete:
Driveways and garages: Every 6 months due to oil stains and heavy traffic.
Patios and walkways: Every 12 months or as needed based on dirt and algae buildup.
Commercial or industrial areas: More frequent cleaning may be required depending on spills and foot traffic.
Regular maintenance, such as sweeping and spot cleaning, can reduce the need for deep cleaning.
Benefits of Using a Non-Corrosive Degreaser
Non-corrosive degreasers are safer for concrete and the environment. They:
Break down grease without harsh acids or alkalis
Eco-Friendly solutions protect plants and grass near the cleaning area.
Reduce the risk of surface damage or discoloration
Are easier to rinse off completely
Choosing the right degreaser helps maintain the concrete’s appearance and integrity over time.
Final Thoughts on Cleaning Exterior Concrete
Cleaning your exterior concrete with a pressure washer, brush, and heavy-duty non-corrosive degreaser is the best way to keep it looking fresh and lasting longer. Regular cleaning prevents stains and buildup that can cause damage. By following the steps outlined here and adjusting frequency based on your specific needs, you can maintain a clean, safe, and attractive concrete surface. This is also the beginning steps to resealing your concrete surface.
For a professional deep clean or to seal your concrete reach out to us or click HERE to get pricing today!
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