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Repairing a Garage Floor With Frost Heave Cracks

Through concrete is among the more solid forms of flooring, it is still subject to damage, such as frost heave cracks. Such cracks occur as the result of water underneath a garage floor freezing and thawing in cycles. These cycles can make concrete slabs move up and down, causing frost heave cracks. Cracks can appear anywhere in a garage floor, but they are more likely to occur near the garage door, as this area is generally colder than the rest of the garage. Though cracks mean the concrete cannot be returned to its original state, they can still be filled, which is a less expensive option than replacing the entire floor.

Things You'll Need

  • Vacuum
  • Leaf blower
  • Broom
  • Dust pan
  • Concrete mender tool kit
  • Fine silica sand
  • Putty knife
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Instructions

    • 1

      Use a vacuum to remove any debris that has settled in the cracks. A leaf blower will also work to remove debris if you do not have access to a vacuum. Sweep up the debris with a broom and dust pan following removal so it doesn't settle back into the cracks.

    • 2

      Fill in crack gaps using a concrete mender tool. A concrete mender kit comes with a cartridge application gun and a cartridge filled with the mender product. Once the cartridge has been loaded into the gun, squeeze the gun's trigger to apply the product to the affected areas. After a crack has been properly filled, follow with an immediate application of fine silica sand. You can find sand at your local home repair store or nursery. The sand will soak up the product. Continue to apply more product and sand into each crack until the cracks are overfilled.

    • 3

      Scrape the excess product and sand away using a putty knife. Sprinkle more sand over each filled crack and allow the cracks to cure for 30 to 40 minutes. If some cracks still appear overfilled, use the putty knife again or leave them as foot traffic and automobiles will wear the product and sand down.

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Floor Repairs
  1. Repairing a Gash in a Veneer Floor
  2. Repairing a Damaged Pressboard Subfloor
  3. Repairing Floor Sag
  4. How to Sand a Hardwood Floor With a Random Orbital Sander
  5. How to Fix a Crack in the Garage Floor Where It Has Heaved Up
  6. Repairing Scuffs on Maple Floors
  7. Do-it-Yourself Garage Floor Coatings
  8. Foundation Problems & Cracks in Floor Tile
  9. Help With Water Drainage on a Garage Floor
  10. How to Repair Minor Cracks in a Block Wall With Caulk in a Garage
  11. How to Repair Frost Heave in Garage Slabs
  12. Repairing Cracks in Long Windows With Super Glue

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