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Cracks in concrete foundation

Posted by Jim Fallon on March 10th, 2000 05:19 PM
In reply to Concrete Cracks by Drew on November 25th, 1997 12:32 PM [Go to top of thread]

A crack has devloped in a cast conrete foundation basement wall of one of our condo structures. An examination by a prof. engineer does not show any evidence of settlement. Previously we have had cracks repaired by excavating,cleaning the crack on the outside, and filling with hydraulic cement, recoating with a asphaltic bitumastic, Sonneborn productt, placing 2 inch thick high density styrofoam board up to grade and filling the excavation with aggregate to about 8 " below grade. This is very expensive. Many local contractors here in Northern Western Ohio have recommended using an expoy resin filler on the inside. One contractor offers a 10 year guaranty for a system using a silicone sheeting system.The conc. floor slab is cut out just below the crack exposing the PVC draintile. The crack is then covered with a 60 mil thick sheet of vinyl plastic coated. It is silicone glued to the concrete surface one foot on either side of the crack line and then anchored using pins shot into the wall. The theory is that seepage through the crack is channeled down to the drainage tile and thus to the sump and pumped out. Do you have any opinion what is the better system, epoxy sealer or the described system? Jim F.

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