Alchemy-Spetec Blog

Case Study: Leak Seal Repair on Waterlogged Concrete Slab

Posted by Anthony Sandone on Jun 7, 2017 2:01:18 PM

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Recently in Queens, New York, a property owner came to our customer George Laubshire of LJS Waterproofing with an incredibly dire problem. Previous contractors poured an 8000 square foot, 36 inch deep slab for him. But they skipped a critical step: They did not waterproof the slab. It turns out that there was water running through underneath. Within a few months the concrete began to completely fail.

The property owner tried to use a diesel pump to get the water out. As you can likely guess, this didn't help much (even after 6 months of running the pump 24 hours a day). By this point over 60 psi of water was pouring out of cracks. In some places, water shot out about 6 inches above the concrete floor. Oakum was applied to slow the water down. But the pressure was so high that it essentially blew the oakum back out - even when the contractors were trying to stomp the oakum down into the cracks.

After careful evaluation, we recommended they use AP Fill 700 (paired with the catalyst AP 107). We advised the contractor to drill ports at an even distance from each other, and then slowly inject AP Fill 700. First they curbed the water flow, and then eventually they permanently remedied the problem. The soil under the slab was solidified to the point that the water in the ground had no choice but to flow somewhere else. After months of failed repair attempts by other contractors, the property owner was happy to finally get this problem resolved.

Afterwards our customer George Laubshire said to me, "Anthony, I've been pumping grout for years. And this is the best product that I have ever used. This product will make any contractor into a hero!"

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Topics: All Posts, Seal Leaks