There is one certainty when it comes to concrete walls–if a crack is left untreated, it will grow. A crack in your basement wall is caused by the ground expanding and contracting around the wall, or by the house settling over time. Left untreated, a cracked wall will make your house unstable, which will result in more cracks. It also can allow water into the home, or if the crack is large enough, can allow insects and small animals to invade the home. The best thing to do is to repair the crack as soon as it becomes evident. You need to follow the steps meticulously in order to get a good bond. Although this may seem like a daunting task, the repair itself isn’t difficult. Here’s what you need to know when undertaking concrete wall crack repair:
Steps to Follow
- Preparation–You need to clear away any loose or unstable concrete from the cracked area. You may need to use a hammer and chisel to completely clear out any questionable material. This may result in widening the crack in some places, but you need to get rid of any chipped or unstable concrete. If cracks are larger than 1/4 inch, you will need to use a bonding agent. Pressure wash the area to remove bits of concrete and surface buildup. Allow the area to fully dry before continuing.
- Application–Using quality, brand-name products that are appropriate to your needs, mix the concrete patch powder with water as directed. Blend the material with your trowel until all lumps are removed and the consistency is good. Using your trowel, place the patch material into the crack, working the material deep into the area until the voice is completely filled. Make sure you fill the crack completely, eliminating any air bubbles. This may require you to place the trowel at an angle to assure the void is completely filled.
- Finish–Apply pressure to the damp concrete to make sure the crack is completely filled. Smooth the surface area, creating a nice edge between the new and old surfaces. Use a brush to smooth and blend the patch. Let set for 24 hours. Clear away any spilled concrete patch before it has time to set.
If you follow these steps and take your time, you can do your own concrete wall crack repair.