Exposed aggregate is a popular hardscaping choice. It has the affordability and flexibility of concrete, but its unique finish offers more design flexibility. The aggregate can be a variety of colors, textures, shapes, and sizes. Different types of aggregate can also be used in different parts of the design for even more options.
Because of its textured surface, exposed aggregate concrete can capture dirt and debris, leading to stains and damage over time. It’s important that you develop the proper cleaning routine and stick to a schedule to protect your investment and keep your exposed aggregate concrete looking good. In this article, we will discuss how to clean exposed aggregate concrete effectively, the reasons behind its deterioration, and the mistakes you should avoid while trying to clean it.
Reasons Behind Concrete Aggregate Deterioration
There are many factors that can contribute to the deterioration of exposed aggregate concrete over time. These are the same factors that can threaten standard concrete, but they are an even bigger threat to exposed aggregate because of the nooks and crannies in the surface.
Heavy rains can cause mold and staining on the concrete. If the concrete hasn’t been installed with the proper drainage, the rain can also lead to erosion under the concrete or cause ground movement. Snow and ice can cause expansion and contraction that can lead to cracks and other damage. Chemicals that drip from vehicles can cause staining and deterioration. Stress from overly large vehicles or equipment can also cause the concrete to crack or chip.
Of course, the biggest threat to your concrete is simple lack of maintenance. If you neglect your concrete, it can stain, erode, and crumble with time. When your exposed concrete is installed, make sure you talk with your contractor about the proper maintenance and then stick to the schedule.
Tools and Materials to Clean Exposed Aggregate Concrete
Exposed Aggregate
Fortunately, you won’t need much to clean your exposed aggregate concrete to make it look great. The basic tools you’ll need include a broom, a soft-bristled brush for cleaning, and a hose. That’s it. If you like, you can use a leaf blower to clean debris from the concrete, rather than sweeping it. On occasion, you may find the need to use a pressure washer at light pressures to work out stains.
Step-by-Step Cleaning Process
Cleaning your exposed aggregate concrete is not a complex process. Here’s what you need to do:
Step 1: Preparation
Prep the surface by giving it a good sweep to remove any dirt or debris like leaves and sticks. If there is heavy debris, you may want to use a leaf blower to clear the area.
Step 2: Initial Rinse
Next, get a hose and spray the area down to remove any additional dirt that may be stuck in the crevices of the exposed aggregate. The water will also soften any stubborn dirt to make it easier to remove.
Step 3: Applying the Cleaning Solution
You don’t need harsh cleansers for your exposed aggregate concrete. In fact, using them may damage your concrete. Instead, you should look for a water-based cleaner designed for cleaning concrete, or you should mix some household detergent or cleaning soap with water. Apply it to the surface.
Step 4: Scrubbing the Surface
Use a soft-bristled brush to scrub the surface of the concrete and get dirt out of the crevices of the exposed aggregate. The scrubbing can also help to remove some light staining.
Step 5: Pressure Washing (Optional)
In some cases, you may need to pressure wash your concrete to remove stubborn stains. Be sure to use a low setting and proceed cautiously. You want to get out the stains, not cause additional damage to your concrete.
Step 6: Final Rinse and Drying
Finally, you can finish by rinsing off the cleaner and leaving your concrete to dry. You may use a squeegee to remove some excess water and speed the drying process.
Should You Use Concrete Sealer in the End?
If it is time to seal your concrete, you may want to seal it after thoroughly cleaning it. That way, you don’t risk sealing in any stains or debris.
Mistakes to Avoid for Exposed Aggregate Concrete Cleaning
Though regular maintenance of your exposed aggregate concrete is important, you must be careful not to make mistakes during your maintenance that can damage your concrete, rather than protect it. Here are some common mistakes to avoid:
Avoiding the Use of Harsh Chemicals
You should avoid the use of harsh chemicals, which can cause the concrete to break down and make the whole surface weaker. Use mild detergents and cleaners designed for exposed aggregate.
Caution with Pressure Washing
Sometimes, you’ll need a little more force than mild brushing to remove stains. You can use a pressure washer to get some of that dirt out, but you must be careful. Use a lower setting to avoid loosening any of the aggregate or damaging the concrete.
Use of Metal Tools
Metal tools can easily scratch or chip your exposed aggregate concrete. Avoid them and use soft-bristled brushes and water sprayers for your maintenance.
Forgetting to Pre-Wet Before Cleaning
Pre-wetting or rinsing the surface before cleaning can dissolve dirt to make it easier to remove, and it can dilute the cleaners that you are about to apply, providing some protection for the surface. Always start with a rinse before you get to work.
How Can Professional Advice and Consultation Help?
There may be times when you cannot clean your exposed aggregate completely or tend to all its maintenance. In those cases, you’ll need to call in a professional for advice and assistance. You may need to work with a professional to deal with stubborn stains from mildew or grease, as well as to handle mineral deposits. A professional has the right tools and expertise to remove these stains without causing damage.
Work with Triad Associates’ Exposed Aggregate Experts
Call the exposed aggregate experts at Triad Associates today if you need help renewing your exposed aggregate concrete. Our professionals can help to remove stubborn stains or to make repairs to have your concrete looking great again. We also perform sealing to protect your concrete against future damage. Or, if you are interested in getting an exposed aggregate driveway, patio, or other surface, our contractors are ready to design your new hardscape and transform your property. Call us to schedule a consultation today!
