How to Patch Cement Floors


Patching holes in cement floors is not difficult. However, it is important to note the difference in materials used and preparation needed for successful completion of this do-it-yourself project. For shallow cracks in cement, a mix of sand and cement is needed. For deep holes, a mixture of crushed stone aggregate and cement is needed. It is important to follow the proper methods of repair to ensure lasting results of your patched cement floor.

Things You'll Need

  • Trowel
  • Chisel
  • Hammer
  • Cement mixture
  • Cement bonding agent
  • Use a hammer and chisel to flatten out the hole. Make the bottom portion of the hole as level as possible. Chip pieces of cement out from under the sides.

  • Clean out crumbled pieces of cement. Use a vacuum to get all the small pieces. Wash and dry the cement thoroughly.

  • Purchase a cement bonding agent. Acryl is a good quality brand and can be purchased at any home improvement store for roughly $20 per gallon. Brush cement bonding agent onto existing cement.

  • Mix cement mixture with water. For small cracks, use a mixture of cement, sand and water. For larger holes, use cement, crushed-stone aggregate and water. Follow manufacturer's instructions for mixing. Use a trowel to scoop the mixture down into the crack or hole. Press down firmly to make sure cement oozes into all areas. Use the trowel to level the top of the repaired hole to match the existing cement. Allow cement repair to dry 24 hours before walking on it.

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