Epoxy fill should be used to repair cracks in basement walls. Contractors use a semi-rigid epoxy material, which can still be “cured” after it has dried. Because epoxy is flexible, it can “move” along the wall while still maintaining a strong seal.
Is This Foundation Crack Normal or Dangerous?
If you are unsure about your foundation cracks, monitor them to see if they are increasing in size. Simply use a pencil to mark off and date the ends of each crack. Within a period of time, you will be able to tell if the crack is due to natural settling or if it indicates a more serious problem. Tracking them will also help foundation repair experts determine how they were formed and the best way to fix them. Take a look at the types of foundation cracks below to determine if your foundation crack is a cause for concern.
Vertical and Diagonal Foundation Cracks
Usually, a diagonal or vertical crack in the foundation wall is the result of settling in the concrete foundation and is quite common in new construction. Because concrete shrinks while it cures, these cracks are called shrinkage cracks. They usually run vertically or diagonally, are often located in the middle section of walls and are less than 1/8 in wide.
Frequently you will find vertical cracks in block foundations. If the crack is located closer to a corner and is wider than 1/8 in, it is probably not due to shrinkage but indicates a more serious foundation issue. If your vertical foundation crack is wider than 1/8 of an inch, call a professional foundation repair company to get it inspected as it may be a cause for concern.