How To Fix A Large Crack In A Concrete Sidewalk | Surprising Results!
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4 months ago
Published on May 16, 2024
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Table of Contents
How to Fix Large Cracks in a Concrete Sidewalk
If you have large gaps over one inch in your concrete sidewalk, follow these steps to fill them effectively and prevent grass from growing through the gaps.
Materials Needed:
- Nylon cup brush wheel
- Exterior caulk
- Standard play sand
- Standard backer rod or polyethylene foam (pool noodle)
- Vulcan 45 SSL (self-leveling sealant)
- Duct tape
- Sand for finishing
Step 1: Pre-Work
- Use a nylon cup brush wheel on a drill to clean the cracks and remove dirt and debris.
- Remove any existing exterior caulk from the cracks.
Step 2: Fill the Gaps
- Fill any larger voids with standard play sand.
- For consistent gaps of half inch to one inch, use a standard backer rod from a home improvement store.
- For gaps larger than one inch, custom-cut a polyethylene foam (pool noodle) to fit as a backer rod.
- Press the backer rod or foam into the gap until you reach resistance.
Step 3: Seal the Gap
- Apply Vulcan 45 SSL or a similar self-leveling sealant on top of the backer rod or foam.
- Ensure the sealant fills the gap evenly and smoothly.
Step 4: Finishing Touches
- Close off the ends of the filled gap with duct tape to prevent the sealant from leaking out.
- Confirm that the backer rod or foam is not protruding too high above the concrete level.
- Clean up any loose debris with a shop vac.
- Let the sealant set for about 10 minutes.
- Sprinkle sand over the sealant to blend it with the sidewalk and prevent debris accumulation.
Additional Tips:
- Check your downspouts and gutters for proper drainage to prevent future cracking and heaving issues.
- Regular maintenance and prompt repairs can help extend the life of your concrete sidewalk.
By following these steps, you can effectively fill large gaps in your concrete sidewalk and maintain its durability and appearance.