What do you do if you need to repair a poured concrete wall? This article walks you through repairing it, including wall cracks, cold joints, snap ties, etc.
- Be aware of the problems that can be caused by water intrusion that occurs in poured concrete foundations. The causes include:
- Improperly sealed snap ties.
- Cold joints (where new concrete meets existing concrete i.e. in an addition of a home).
- Water, well, sewer, and electrical conduit pipe penetrations.
- On rare occasions, water can come through a concrete wall that hasn’t been properly vibrated thus creating a honeycomb area in the concrete.
- The injection process fills the crack from top to bottom, from inside to outside. This repairs and stops the water intrusion.
- The old process of v-ing out a crack from the inside or outside and patching it with hydraulic cement or water plug will not work.
- Foundations are prone to movement and because the hydraulic cement or water plug doesn’t have the strength to withstand future movement it will crack and cause the foundation wall crack to fail.
- Epoxy injections are considered structural repairs and will weld the foundation back together when done properly. Urethane injections will stop water but are not considered structural fixes. It is however flexible and can withstand movement in the foundation. Newer cracks on homes that have been allowed to settle for at least 1-2 yrs are good candidates for epoxy injection. Because epoxy is like superglue gluing or welding the foundation together it needs a fairly clean crack in order to be successful.
- For older homes that have had cracks previously repaired and have dirt and silt built up inside them, a urethane injection will be more successful in stopping water.
- Inject a snap tie under pressure from the inside with a urethane resin will stop them from leaking.
- To stop a pipe penetration from leaking, an injection of a urethane resin that expands up to 20x its volume thus filling the void from inside to outside should be used. Injecting around a pipe penetration from the inside will stop water seepage.