The basic way to understand Epoxy Injection is that it does the same for concrete as welding does for steel. Usually when a foundation fails, large cracks form and remain in the walls or grade beams even after foundation underpinning. These cracks can be weak points in the foundation wall and can allow moisture to creep into the living area. We can repair the crack by injecting a high strength epoxy resin under high pressure into a cracked area and seal it. Studies have shown that once the resin dries, the foundation will be stronger at that point and should not crack in the same place again.