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WALL CRACKS

Leaking and Structural Crack Repair with Low-Pressure Injection 

Foundation Cracks are all too common. Initially, they don’t seem to pose any threat. The fact is, they have potential to grow wider and cause serious problems down the road. Most foundation cracks are a result from the shrinkage after a basement is poured. Some can be from foundation movement caused by erosion or shifting. For whatever the reason being, there is a great opportunity for water seepage or the possibility of structural deficiencies.

High Pressure versus Low Pressure Injection

Using low pressure injection allows the applicator to better monitor the injection. This allows the liquid resin to penetrate and expand deep into the crack and most times to the outside of the wall. The crack is filled from inside out and bottom to top, leaving all voids filled.

Using high pressure injection requires the contractor to drill ports on both sides of the already unstable wall. This leads to further cracking in the process. High pressure injections fail to fill all voids since the resin is injected so fast that it takes the path of least resistance. This also results in the crack only filling in half the wall depth.

Epoxy versus Polyurethane

This question goes along with another question. Is the crack structural or non-structural with leaking? If the crack needs to be structurally repaired and the area needs to be as strong as, or stronger than the concrete around it, the answer is simple. You will use epoxy.

The answer is less simple if the crack needs only to be repaired to prevent water leaking. Either product can be used to accomplish this task. Polyurethane foams are the choice in most cases because of its ability to absorb water as its injected and it expands up to 30 times its volume.

Advantages to Correcting Foundation Cracks

• Increased resale value of your home
• Stop Mold growth
• Prevent Moisture from entering your home
• Prevent further cracks and structural problems

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