Illinois Roofing Practice Exam

Which best describes dampproofing methods?

1. It is designed to resist capillary action.

2. It is applied only in arid climates.

3. It is primarily for decorative purposes.

4. It is only effective below ground level.

The correct answer is: It is designed to resist capillary action.

Your chosen answer correctly identifies that dampproofing methods are designed to resist capillary action. This is an essential function of dampproofing, as it involves applying a barrier that prevents moisture from penetrating through the building materials, especially in areas like basement walls. By addressing capillary action, which allows water to move through porous materials against the force of gravity, dampproofing helps protect structures from water damage and deterioration. In contrast, applying dampproofing only in arid climates is incorrect, as it is essential for any construction that may experience moisture, not limited to dry areas. It is not simply for decorative purposes, as its primary role is functional—protecting against moisture infiltration rather than aesthetics. Lastly, while it is crucial for below-ground applications, dampproofing can also be applied to above-ground sections to combat moisture problems, making it effective in more than just below-ground scenarios.