Can You Apply New Concrete Over Old Concrete?
Concrete is durable and can last for many years with proper care. However, it may show signs of wear and tear over time. If your concrete surface looks rough, you may wonder if you can pour new concrete over the old.
With correct maintenance and care, concrete can last for many years. However, it may show signs of wear and tear over time. You may wonder if you can pour new concrete over the old surface to give it a fresh look.
Pouring new concrete over old concrete is possible but requires some preparation and care.
Steps to Prepare Your Old Concrete Surface
- Clean the Surface of All Debris and Dirt
Concrete surfaces like driveways, patios, and sidewalks accumulate dirt and debris over time. Before you can pour new concrete, you’ll need to clean the old surface thoroughly. A power washer is the best tool, but a garden hose and stiff brush can also be used.
- Repair Cracks Or Holes in the Surface With Concrete Filler Or Mortar
Repairing involves filling any cracks or holes in the surface with concrete filler or mortar. Doing this will ensure that your new concrete has a solid foundation to bond to.
You’ll want to check the drainage around your old slab. If water isn’t draining away from the concrete, it can cause problems with your new pour.
- Rinse and Dry Up
Lastly, give your old concrete a good rinse. You can use a hose for this job or even a pressure washer if you have one available. Rinse off all the dirt and debris until the surface is clean. Once it’s clean, allow the concrete to dry completely before moving on to the next step.
How To Pour New Concrete Over Old One?
- Mark the Height and Width of the New Concrete
Use a tape measure to determine how long and wide you need the new concrete pour to be. Add several inches to these measurements to account for the thickness of the new concrete. Use a piece of chalk or spray paint to mark these dimensions on the old concrete.
- Add a Layer of Concrete Bonding Agent Over the Old Concrete
The bonding agent helps rough the surface of the old concrete, giving the new layer of concrete something to grip onto. You don’t need a lot of sand, just enough to create a slightly textured surface.
- Mix the New Concrete According To the Instructions
Check for the right proportions of gravel, sand, and Portland cement. You can find the perfect mix ratio for your project by consulting an expert at your local hardware store. Once you have the concrete mix, water, and any additives you need, it’s time to start.
- Pour New Concrete Over the Old Concrete
You will want to make sure that you do this slowly and evenly. Be sure to vibrate the new concrete as you pour it so it can bond with the old concrete. Once you have poured all the new concrete, you will want to finish it with a trowel. Read More: How Long to Wait Before Walking on New Concrete?
Contact the professionals for the best Atlanta concrete resurfacing needs. The experts can help you determine if concrete resurfacing is the best option for your project.