wall cracks in concrete foundation

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Old 07-13-07, 11:03 AM
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wall cracks in concrete foundation

We will be finishing our basement soon but need to fix the wall cracks (1/4" wide at some places) that run from a window well to the floor of the basemenet. Some guys are suggesting digging all the way down on the outside of house and repairing and another is suggesting a resin of sorts that you inject along the crack from the inside. Anyone ever use this resin? It is supposedly a urethane or "rubber" substance that is more effective than foam which won't last.

Any suggestions?

KS
 
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Old 07-13-07, 07:03 PM
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If it is a living crack (moving), then it should be repaired with a flexible material. If it is dead (not moving, probably a shrinkage crack), then an epoxy injection would be the preferred method.

For the flexible joint, there is a specific joint profile that should be used to ensure the performance and longevity of the repair. This detail will be shown on the product data for the sealant you use. I recommend a high quality commercial sealant like Sonneborn NP1. For your application, you will probably need to use a primer.


For the epoxy fill, you are beyond DIY.

edit-You can certainly use the flexible joint on a dead crack.
 
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Old 07-18-07, 07:19 AM
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Concrete wall crack repair

Full disclosure:

I work for Applied Technologies, a manufacturer of materials to repair exactly what you have.

Contrary to the previous reply, you can do this yourself. We have a kit for homeowners that injects urethane foam into the crack. The urethane expands inside the crack and stops water from entering.

The materials in the kit are the same that the pros use, but it is packaged in a way the is easy for homeowners to use. It also comes with a video to show you how to do it.

Take a look at http://appliedtechnologies.com/pages/content/crack_repair_material.html

You can watch the video online, too. Feel free to call us with any questions.
 
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Old 07-18-07, 07:53 AM
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There you go. That looks like just what you need.
 
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