40 Hour Property and Building Inspection Practice Test

Which of the following is NOT a cause of cracks in foundation walls?

1. Shrinkage

2. Differential settling

3. Heaving

4. High temperatures

The correct answer is: High temperatures

High temperatures are not typically a direct cause of cracks in foundation walls. Foundation cracks generally result from physical changes or stress in the ground or structure, such as shrinkage, differential settling, and heaving, which are related to the soil conditions and the physical forces acting upon the foundation. Shrinkage occurs when materials, such as concrete, lose moisture and consequently contract, leading to cracks. Differential settling happens when different parts of the foundation sink at varying rates due to uneven soil compaction or varying soil types. Heaving is caused by the expansion of soil, often due to freeze-thaw cycles or moisture changes, which can push the foundation upward and create cracks. In contrast, while high temperatures can cause some materials to expand, they are less likely to be a primary contributor to foundation issues directly. Instead, temperature fluctuations may lead to other problems, but the fundamental crack formations typically stem from the mechanical or geological factors mentioned.