How to Repair Concrete Cracks

One of the most common problems faced by home owners is leakages and cracks in the foundation of their homes. This happens mostly due to continued exposure to extreme weather conditions such as heat, snow and rain. It is highly recommended not to neglect foundation cracks and repair them instantly to avoid aggravating the problem and weakening the structure.

Most of us are not happy about calling in a professional due to various reasons including high cost and the hassle of handling workmen walking around the home for days together. These are good enough reasons for you to opt for DIY foundation repair, which is quite easy if you have the right tools.

Repairing the Foundation Leakage

The first step is to identify and locate the crack in the foundation. Clean the crack with the help of a wire brush and remove the loose particles from within the crack by passing a stream of water. Allow it to dry completely before using a patching material that is lime-based to fill the fissure.

Remember to ask for a patching material that is exclusively made for concrete surface. Before applying the material to the crack, keep it soaked in water for some time. The limestone content in the material will expand as it dries filling up the crack well. The final step is to apply a coat of sealant on the surface of the repaired crack after it dries completely.

Common tools that are essential for DIY foundation repair include:

  • Trowels of two types, one for plastering and one for pointing
  • Chisel
  • Screw driver
  • Hammer
  • Drills
  • Wire brush
  • Building materials like mortar, sand and cement

Apart from the above mentioned traditional foundation crack repair, you can also opt for Polyurethane foam and epoxy resin injections. Before administering our high quality injections to the crack, it is essential preparing the crack depending on its size. Use a diamond disc paint to grind hairline cracks before drilling holes along the crack, sealing and installing the injection ports.

Use a sprayer to start from the top and flushing the crack after the sealing dries. After preparing the crack, it is time to inject the PU or epoxy starting from the bottom till the liquid comes out of the next port. Use the plastic plug provided with your DIY kit to seal the port before moving on to the top of the crack.

For a wider crack, it is necessary to break the edge of the crack with the help of a chisel to insert a tube measuring ¼ inches before following the procedure. If the crack is really wide, it is necessary to ensure that the resin injected reaches right into the crack by filling the crack first with round foam and using at the injection port a longer sized tube.

In order to use crack injections to fix foundation cracks, you require the following tools:

  • PU cartridge
  • Glue Gun c/w stick
  • Dual Injection Gun 300 ml
  • Hammer drill ( Dewalt, Bosch or HILTI c/w 12” x 3/8” long bit recommended )
  • Injection Ports
  • Concrete Chisel
  • Hammer
  • Steel Brush
  • Plastic Knife or Trowel for mixing
  • Special cement sealer mixed with Kryton Krystol and hydraulic cement
  • ¼” plastic tubing