Cracks in concrete patio are unsightly, and they don’t have to be a permanent problem. With easy-to-use tools and materials, anyone can easily repair them and restore the patio to its former glory.
In this beginner-friendly guide, our experts here in The Littleton Concrete Company will walk you through the process step-by-step, offering easy DIY solutions for different types of cracks and providing valuable tips for a successful repair.
6 Steps to Repair Cracks in a Concrete Patio
Step #1: Assess the Damage
Before you start, it is important to evaluate the extent of the damage first.
First, identify the type of cracks in the patio—are they hairline cracks, wider cracks, or significant settlement cracks?
Next, try to find out and understand the cause. This will help you future cracks. Common causes include shrinkage, ground movement, overloading, and poor installation.
Step #2: Gather Your Tools and Materials
Once you’ve assessed the damage, gather the necessary tools and materials. Here’s a basic list:
| Safety Gear | Dust mask, safety glasses, work gloves |
| Cleaning Supplies | Garden hose, broom, shop vacuum |
| Tools | Hammer, trowel, cold chisel, wire brush |
| Materials | Concrete crack filler, concrete sealant |
Step #3: Prepare the Crack
Proper preparation is crucial for a successful repair.
- Clean the Crack: Remove any loose debris, dirt, or vegetation from the crack using a broom, stiff brush, and garden hose. For deeper cracks, use a shop vacuum to remove any remaining dust and debris.
- Widen the Crack (if necessary): For cracks wider than 1/4 inch, use a cold chisel and hammer to widen the crack slightly, creating a V-shaped groove. This will help the patching material adhere better.
- Undercut the Edges: Use the chisel to undercut the edges of the crack to create a wider base at the bottom. This will prevent the patch from popping out.
- Clean Again: Brush off dust and debris produced during the widening and undercutting process.
Step #4: Choose the Right Repair Material
The type of repair material you choose will depend on the size and type of crack.
| Types of Cracks in Patio | Material |
| Hairline Cracks | Use a concrete crack filler. This is a liquid or semi-liquid material that can be easily squeezed into the crack. |
| Wider Cracks | Use a concrete patching compound. This is a thicker material that can be troweled into the crack. |
| Larger Cracks | For cracks wider than 1/2 inch or cracks that indicate significant settlement, it’s best to consult a professional. |
To apply the material, follow these steps:
Step 1: Dampen the crack. Lightly dampen the crack with water to help the patching material bond better. Don’t over saturate the area.
Step 2: Apply the material.
- For crack fillers, squeeze the material into the crack, filling it completely.
- For patching compounds, use a trowel to apply the material, pressing it firmly into the crack and ensuring it fills the entire void.
Step 3: Smooth the surface. Use the trowel to smooth the surface of the patch, blending it in with the surrounding concrete.
Step 4: Allow to cure. Follow the manufacturer’s instructions for curing time. This typically takes 24-48 hours.
Step #6: Seal the Concrete (Optional)
Once the repair material has cured, you may apply a concrete sealant to protect the patio from further damage and enhance its appearance. This is optional—still, sealants can help prevent water penetration, staining, and cracking.
Choose a sealant that is appropriate for your climate and the type of concrete you have.
5 Tips for a Successful Repair
- Work in small sections: If you have multiple cracks, it is best to work in small sections to prevent the patching material from drying out before you can apply it.
- Avoid working in direct sunlight: Direct sunlight can cause the patching material to dry too quickly, leading to cracks. Work in the shade or early morning/late evening.
- Use a bonding agent: For larger cracks, consider using a bonding agent to improve the adhesion of the patching material.
- Don’t overfill the crack: Overfilling can create a bump on the surface of the patio.
- Control joints: If your patio has control joints, make sure the repair material does not obstruct them. Control joints are designed to allow for expansion and contraction of the concrete.
Littleton Repairs Cracks in Concrete Patio
Repairing cracks in a concrete patio is a manageable DIY project that can significantly enhance your outdoor space. Remember to take your time, follow the steps carefully, and use the right materials for optimal results.
However, if you are too busy to do DIY projects, you may need to hire a reputable company. The Littleton Concrete Company is your partner to all things concrete. We offer concrete solutions that improve the functionality, aesthetics, and value of your property.
Save your time and let our team restore the beauty of your patio. Call us today at (720) 807-9628 or send us a message.
