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- What causes foundations and slabs to sink?
- Warning signs of foundation/slab failure
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- Foundation repair cost: What are the variables?
- Foundation Repair Methods
- Concrete foundation repair methods
- Piering: Home foundation repair
- Slabjacking: What is slabjacking?
- Related Information:
- How to hire a foundation repair contractor
- Concrete repair: Repair methods and troubleshooting basics
- Read more about foundation repair on FoundationRepairNetwork.com
Problems/ Solutions When Repairing Concrete Foundations
Problem: Grout doesn't pump into hole, or squirts back out.
Solution: Blow out the hole with air or drill further into the sub-base.
Problem: New cracks form or old ones are enlarged.
Solution: Usually a problem with technique: pumping too much grout into one hole, using grout that is too stiff, or pumping holes in the wrong sequence. Rule of thumb: don't lift a slab more tha an inch while pumping at one hole.
Problem: Slab lifts in wrong place.
Solution: The grout may be too thin. Leave the hole for a while, and come back with a thicker grout.
Problem: Slab binds against concrete and won't rise.
Solution: Grout may be flowing beneath an adjoining slab, use a thicker grout. You can also relieve binding by chipping concrete the edge of the slab, sawing a relief slot all the way through the slab, make sure joints and cracks are clean before starting to pump grout.
Problem: Grout leaks through cracks or joints at the side of the slab.
Solution: Let it set up, then resume normal pumping. Leaks at the slab edge can be stopped by using a thicker grout.
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