40 Hour Property and Building Inspection Practice Test

What causes the lifting of an edge of foundations?

1. Freezing temperatures

2. Excessive moisture

3. Earthquakes

4. Improper construction

The correct answer is: Excessive moisture

Lifting of an edge of foundations is primarily caused by excessive moisture in the ground surrounding the foundation. When soil absorbs too much water, particularly in clay-rich soils that have high plasticity, it can expand significantly. This phenomenon, known as soil heaving, occurs when the soil expands as it takes in moisture, pushing upwards and potentially lifting the edges of the foundation. The expansive forces generated by the swelling soil can lead to structural issues in a building, such as cracks in walls and floors or even complete misalignment of the structure over time. It is important for property inspectors to assess moisture levels and drainage patterns around foundations to prevent and address these problems. While other factors, such as freezing temperatures and improper construction practices, can play a role in foundation problems, excessive moisture is a primary direct cause of edge lifting in foundations.