What are the common signs of a crack in a house foundation and how can it be repaired effectively?

Common signs of a crack in a house foundation include visible cracks in walls or floors, doors and Windows that stick or don't close properly, and uneven floors. To repair a crack effectively, it is important to first identify the cause of the crack. This may involve hiring a professional to assess the situation. Depending on the severity of the crack, repairs may involve filling the crack with epoxy or polyurethane injections, installing carbon fiber strips, or even underpinning the foundation. It is crucial to address foundation cracks promptly to prevent further damage to the structure of the house.