The surface of concrete slabs, walkways, driveways and sidewalks wears down over time, making it look rough and unpleasing to the eye. Concrete resurfacing involves applying a new layer of material over this existing rough surface to restore or enhance its appearance, functionality, and durability.
This is a cost-effective way of repairing or replacing old or damaged concrete, because instead of breaking down and building a new walkway, driveway, sidewalk or even patio floor, you can just resurface the old one, making it look new again.
Concrete resurfacing is simply like applying makeup to old concrete surfaces to make them look new.
To resurface old concrete you need a resurfacing material, also known as a resurfacer. A concrete resurface typically consists of a blend of cement, aggregates, polymers and other additives.
These materials are prepared and designed to bond well with existing substrates and create a durable, smooth, and aesthetically pleasing finish. A resurfacer can be applied in thin layers, ranging from a feather-edge up to several inches thick, depending on or the specific requirements of the project or how badly worn out the existing surface is.
Types of Concrete Resurfacers
Cementitious / Concrete Overlays
Cement or concrete overlays are basically a blend of cement, sand, water and other additives. It just involves covering the old concrete surface with a new cement mixture. They are often used for thin resurfacing applications, ranging from feather-edge repairs to slightly thicker overlays.
They can be applied manually using trowels and levelers or they can be sprayed onto the surface using a sprayer.
You can use them on driveways, walkways, sidewalks, patios and any other type of concrete structures that needs resurfacing.
Polymer-Modified Overlays
Polymer-modified overlays or resurfacers are very similar to the cementitious overlays talked about above, but they also contain polymers such as latex or acrylics which helps to enhance properties such as strength and durability of the mixture.
Microtopping
Microtoppings are generally designed for interior use to rejuvenate worn or damaged surfaces and provide a smooth and refined finish. They’re exceptionally thin concrete resurfacers typically applied in thicknesses less than 1/8 inch or 3mm.
This allows them to be added to surfaces without adding excessive thickness or weight to the existing concrete surface.
They can be customized with various colors, textures, and decorative effects, which makes them very versatile for use on a variety of surfaces, including floors, countertops, and other vertical surfaces.
One key advantage or reason for using microtoppings for resurfacing is that they create a very smooth and refined finish on the surfaces they’re applied on. They can be applied using using a trowel or can even be squeegeed onto the substrate to achieve a very uniform and seamless look.
Epoxy Resurfacers
Epoxy concrete resurfacers consists mainly of epoxy resins combined with aggregates and fillers. They’re specifically designed to be very durable, chemically resistant to other elements, and to be visually appealing.
Their chemical resistance makes them very suitable for areas where exposure to chemicals or corrosive substances are expected. They’re also waterproof, which makes them also suitable for areas where moisture is expected like countertops and floors.
They have excellent bonding strength, ensuring a strong and reliable bond to the underlying substrate. This helps to prevent delamination or peeling and ensures a long-lasting and durable resurfacing solution.
Epoxy concrete resurfacers are available in a wide range of colors, finishes and decorative options. They can be customized with pigments, flakes, quartz, or other aggregates and can be used to achieve glossy, matte, or textured finishes, enhancing the overall appearance of the finished concrete.
Their smooth, non-porous surfaces resist dirt, dust, and stains, which makes them easier to maintain and suitable for environments that require regular cleaning.
Self-Leveling Compounds
Self-leveling resurfacers are flowable compounds designed to level uneven concrete substrates. When poured onto a concrete surface, the self-leveling compound spreads and levels itself, creating a flat and smooth finish.
They’re commonly used to correct minor surface imperfections and create a level substrate for subsequent flooring installations.
How To Resurface Concrete
Resurfacing that your old worn out driveway will require a few steps.
Step 1: Prepare the surface
In order for the resurfacing material to stick to the existing substrate, you need to clean away and remove any dirt, debris, grease, and any other loose or flaking material on the substrate. You can use a brush or broom to sweep it off, but that won’t clean it thorough.
Instead, use a high pressure washer, and it will blast off any dirt and debris on the surface, exposing and laying bare the underlying surface.
Step 2: Evaluate the cleaned surface
Access and evaluate how bad or damaged the underlying substrate is. If there are deep cracks, severe damage, or other serious structural issues, it may be best to consult with a professional or consider removing the underlying concrete layer entirely and building a new one.
Step 3: Choose a suitable resurfacer
As you already know, there are different types of resurfacers you can choose from. The third step involves choosing the right one based on the type of look you’re going for, durability, condition of the substrate, and recommendations from a professional.
Step 4: Mix and apply the resurfacer
Once you’ve selected your choice resurfacer, mix it according to the instructions from the manufacturer and apply it on the surface. Ensure the it’s mixed to the required consistency, so that it can be spread easily.
Depending on the product, you may use a trowel, squeegee, or specialized tools to spread and level it, following the desired thickness or level. Work in sections, starting from one end and moving towards the other, to ensure a consistent thickness and avoid visible seams.
Step 5: Decorate
If you wish to, you can decorate the surface once it has been leveled. You can add any desired decorative finishes, such as stamping, texturing, or coloring.
Step 6: Allow it to cure and dry
You need to allow the resurfacing material to cure and dry, following instructions from the manufacturer. This involves providing adequate curing time and protecting the surface from foot traffic. You can put up signs for people, and if you have pets, ensure they don’t run over the wet surface.
Step 7: Apply sealant (Optional)
Applying a sealant is optional. Depending on the resurfacing material and desired finish, you may choose to apply a sealant or coating to enhance the durability, appearance, and protection of the resurfaced concrete.
Please not that the specific steps listed above and requirements may vary depending on the resurfacing material or the condition of the existing concrete.
For the best results, ensure you consult with professionals or follow the detailed instructions provided by the manufacturer of the chosen resurfacing material.
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