Urethane injection is a non evasive procedure that repairs cracks from the inside out on a foundation wall. Urethane is a flexible resin that is injected directly into the crack. It expands doubling in size sealing the crack preventing water from seeping through. Internal French Drains are a water management system used to manage dampness or leaks specific to a cinder block foundation or a field stone foundation wall. We jack hammer the existing concrete floor of the problem area 8-12 inches in width from the foundation wall. We then install a 4 inch weeping tile sloped to either an existing a sump pit or a newly installed one that we put in. The trench is filled with gravel and the floor refinished in concrete.