This is one of my favorite wet basement photographs, and really backs up the phrase "a photo is worth a thousand words." The photo shows an inside foundation wall with some insulation removed. This wet basement area was leaking a great amount of water on the floor during big rains. The home owner was mad because they had a drain tile system but it was dry most of the time. The photo shows a vertical wall crack and the dark area is water on the foundation and floor and what's left of a tie rod above the black corrugated channel on the floor. With poured walls, tie rods were used to hold forms together when they poured the walls. When the concrete sets, the forms are pulled but the contractor has no choice but to leave these tie rods in the concrete (they normally bust off the protruding tab ends). Made of metal, these tie rods rust when exposed to water, this one is no different leaving a good size hole in the wall and possibly providing a stress point that lead to the vertical crack.
The black corrugated channel is supposed to capture this water and drain it down to an underfloor drain tile system leading to a sump pump and sump pit. This drain tile system has failed here and a few other places in this basement and we see this type of drain tile failure often especially when the water comes out above the floor.
Great Lakes Waterproofing uses all methods of waterproofing, they all have their strong points, but we love to do exterior waterproofing and really seal up the foundation. In most cases, exterior hydroclay waterproofing is the least costly. In this situation we injected all-green bentonite hydroclay along this side of the home, filling in voids and cracks. Once set up water is not able to get through this barrier and after a year and a half of record rain fall this basement is dry again.
For customers wanted to address the crack as well, we offer Fortress Stabilization Carbon Fiber Strips. We would use marine grade epoxy and attach carbon fiber strips to staple up the crack preventing it from future movement.