Construction Supervisor License Practice Exam

For which condition is a dampproofing requirement necessary?

1. When moisture is present below grade

2. When the basement is fully finished

3. When the ground level is below the basement floor elevation

4. When the home is built in a wetland area

The correct answer is: When the ground level is below the basement floor elevation

The requirement for dampproofing is necessary particularly in conditions where the ground level is below the basement floor elevation. When the ground around a structure is lower than the floor of the basement, there is an increased risk of groundwater infiltration. This can lead to moisture accumulation within the basement, potentially causing structural damage, mold growth, and other moisture-related issues. Dampproofing serves as a barrier that prevents water vapor and moisture from penetrating the walls and floors of the basement, thereby protecting the integrity of the structure. In areas where moisture is present, such as below grade, or if the basement is fully finished, while they may seem relevant, these conditions do not inherently necessitate dampproofing unless they involve a significant difference in elevation. Similarly, homes built in wetland areas may require further waterproofing measures, but the specific elevation of the ground relative to the basement floor's height is a more critical factor in determining the need for dampproofing.