Why Do Concrete Basement Floors Crack?


No one wants to see cracks in their basement floor. However there are many things to consider when you see cracks, other than looks. These cracks may allow moisture into your home, or even worse your foundation may be shifting causing your structure to become unsafe.There are many reasons why the basement concrete floor may start cracking.

Here are common reasons:

  1. Settling–The weight of the slab may cause the concrete ground to settle at different levels. The settling of the grounds at different levels will always lead to development of cracks. This is due to the fact that the ground will tend to be stretched at different levels.
  2. Water–Too much water under the concrete slab will lead to uneven stretching of the slab. This will eventually lead to the development of cracks on your concrete floor. If you live in areas where there is a lot of water surrounding your home, you should try and get rid of the water with drainage techniques.
  3. Improper Thickness—If the installer of your slab did a substandard job, then there are high chances that the slab will develop cracks. In order to avoid such incidences, you should try and hire a qualified expert who will have the best slab installed in your home. Some of the measures that a slab installer can take to avoid cracks that can be caused by uneven thickness include making use of reinforced wire.
  4. Uneven Weight Distribution–In case you install home accessories such as hot tubs, pool tables, or other accessories that are very heavy, you can end up exposing the basement floor to cracks. This can easily occur if the slab of your house is not thick enough.
  5. Freezing/Thawing–The expansion and contraction of soil over a long period of time can easily lead to development of cracks on the concrete floor. This is due to the fact that during the expansion and contraction, there will be uneven pressure exerted on the concrete floor.

Just as there are many reasons the concrete can crack, there are many ways it can be repaired. Be sure to find a contractor who can examine the problem to determine the cause before attempting to make corrections. You should also check out the references and experience of your contractor before hiring. It’s also a good idea to get estimates from two or three contractors before making a final decision.