How to Repair a Poured Concrete Wall

Posted on October 2, 2017 By

Water intrusion by means of poured concrete foundations is typically the effect of the following issues:

Foundation wall splits, cold joints (where new cement meets existing concrete i. electronic. in an addition of a home) improperly sealed snap ties plus water, well, sewer and electric conduit pipe penetrations. On uncommon occasions water can come through a concrete wall that has not already been properly vibrated thus creating a honeycomb area in the concrete.

Repairing Wall Cracks

The only way to repair foundation wall cracks effectively would be by the injection process. Injecting a typical wall crack having an epoxy or urethane resin is completed under pressure pushing the material from inside all the way to the outside. The shot process fills the crack through top to bottom, from inside to outside thus repairing and preventing water intrusion. The old procedure for v-ing out a crack from inside or outside and patching this with hydraulic cement or drinking water plug will not work. Foundations are usually prone to movement and because the particular hydraulic cement or water put doesn’t have the strength to endure future movement it will crack plus cause the foundation wall crack to fail. Epoxy injections are considered structural repairs and will weld the foundation back again together when done properly. Urethane injections will stop water but aren’t considered structural fixes. It will be however flexible and can withstand motion in the foundation. Newer cracks upon homes that have been allowed to accept at least 1-2 yrs are good applicants for epoxy injection. Because epoxy is like superglue gluing or welded the foundation together it needs a pretty clean crack in order to become successful. For older homes that have got cracks previously repaired and have dust and silt built up inside them, a urethane injection will be more successful within stopping water.

Repairing Cold Joints

Because no chemical bond is created whenever new concrete is poured towards old concrete, cold joints, like when you put an addition in your home, will often leak water. After the addition has been able to settle for a period of 1-2 years, the proper repair to stop drinking water coming through a cold joints would be a urethane injection.

Repairing Snap Ties / Tie Rods

Metal snap ties / tie supports are used to hold the forms of a foundation in place while it is being put. After the forms are eliminated, the snap ties on the outside are generally coated with a flexible plastic or hydraulic cement before a damp proof or water proofing membrane is applied to the building blocks. These snap ties can drip over time if the prep work is just not done properly. Injecting a take tie under pressure from the inside with a urethane resin will stop leaking all of them from leaking.

Repairing Pipe Penetrations

During the construction of a house, holes in the foundations are cored to allow for water, well, sewer and electrical conduits to permeate through the foundation. For example, a typical sewer line is four inches around. The hole cable maybe up to 5 ins or more thus leaving a gap between the outside of the sewer pipe as well as the concrete. Prior to backfilling the building blocks on the outside, these voids are typically filled up with hydraulic cement. Improper preparation close to pipe penetration can cause water invasion. To stop a pipe transmission from leaking, an injection associated with a urethane resin that extends up to 20x its quantity thus filling the void from the inside to outside should be used. Injecting around a pipe penetration from inside will stop water seepage.

Repairing Honeycomb Areas

A honeycomb area in a foundation is the result of improper sto? or settling of the concrete therefore leaving voids and pockets within the wall. Injecting a urethane botanical under pressure will seal and fill up these voids and pockets therefore stopping the leak.

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