A Step By Step Guide To Repairing Basement Floor Cracks

An ultimate step by step DIY guide to repairing basement floor cracks

Basement floor cracks are one of the most common problems faced by many homeowners. Basements are the areas that require constant vigilance and maintenance. Cracks that may appear should be fixed as soon to prevent further damage. In this article, we are going to explore useful ways of repairing basement floor cracks.

Repairing Basement Floor Cracks

  • Cracks usually vary in size but if they are wider than one-eighth of an inch, they need immediate repairing. Sealing small cracks as soon as they appear saves you time and extra resources required for repairing enlarged crevices.

Materials Required For Repairs

Start by cleaning the surfaces and removing any loose pieces of concrete that may be stuck within the cracks. Use a wire brush to make the process easier. Make sure you have the following tools and materials before you start repairing your basement floor.

  • Clean masonry sand
  • Portland cement
  • A bonding agent
  • A tape measure or a ruler
  • Smooth trowel
  • Chipping hammer
  • Bullnose pointing trowel
  • Steal finishing trowel

Preparation Of The Basement Floor

  • First, determine the length of the crack that needs to be repaired. Use a tape measure or a ruler to do this.
    Once the size and surface of the crack are established, start the chipping process to create a rough surface. A chipping hammer can be used for this purpose.

Use a wire brush to sweep off the chippings. A clean surface is crucial for allowing the new material to adhere properly to the floor surface.

Mixing The Materials

The next step involves mixing the material that needs to be filled in the chipped-out areas. Follow the below-mentioned procedure to ensure the correct filling of the cracks.

  • Add 1 part cement to 2 ½ parts of clean masonry sand. Use grade I or II cement for better results.
  • Mix the dry materials properly and then add water.
  • Liquid polymerized or latex bonding agents can be added to the dry mix or the surface for better bonding.
  • Use clean and fresh water to dampen the chipped area. This is useful for proper adhering of the mixture and for sealing the cracks.
  • A damp surface will help prevent the rapid drying of the materials. If the surface is not made wet before pouring the mix, it will attract water from the fresh concrete mixture. This will lead to cracks in the future.

Filling The Basement Floor Cracks

  • repairing basement floor cracksFill the cracks using the freshly prepared concrete mix once the patches are clean and damp.
  • Mix the cement and sand mixture properly before pouring it on the patches.
  • Use a bullnose trowel to scoop the concrete mixture and place it in the patch.
  • Ensure that no air is remaining in the spot.
  • Give the patch some time to dry before using a smooth trowel to smoothen and level the surface.
  • Allow the patch to dry overnight. Keep splashing some water over it to ensure even drying.
  • Once the patch is completely dry, inspect to see if it requires additional filling.
  • Use the edge of the trowel to clean the adjacent surfaces.
  • Hydraulic cement can be used to achieve faster results. Because it dries and sets within just 30 minutes.

Sealing The Patches

  • Sealants can be used to make the concrete stain and water-resistant. Heavy-duty polyurethane can be used to seal the floor. The main advantage of these sealants is that they dry quickly to give a waterproof finish. For additional protection, apply a second coat when the first one dries.

If you have cracks in your basement and you are not comfortable repairing them, then call in the pros. Crack-X is a civil structures repair company operating in Maine and New Hampshire. We will inspect your property and take the necessary measures to repair your basement floor. Give us a call at 877-727-2259.

Scroll to Top