International Compliance Association (ICA) Home Inspector Practice Exam

What is the most common defect found when inspecting roof vents?

1. Cracking

2. Water leakage

3. Damage from animals

4. Poor installation

The correct answer is: Water leakage

Water leakage is often the most common defect observed when inspecting roof vents due to several factors. Roof vents are designed to allow for proper airflow within the attic space, but their exposed nature makes them susceptible to a variety of environmental conditions. Over time, caulking, flashing, or the vents themselves can degrade, leading to openings where water can infiltrate, especially during heavy rain or snowmelt. Additionally, inadequate sealing or installation practices can contribute to improper drainage, directing water toward these vents instead of away from them, which also exacerbates the risk of leaks. Inspectors look for signs of water stains, mold, or rot around the vent areas during an evaluation, as these are clear indicators of water intrusion linked to vent defects. The other defects could occur but are less frequently observed than water leakage. Cracking may happen due to temperature fluctuations or exposure to the elements, but it is less prevalent as a standalone issue. Damage from animals can occur, particularly if animals are trying to enter the attic through vents, but this tends to be less common compared to leaks. Poor installation of roof vents can be a concern, often leading to leaks in the long term; however, the immediate and observable effect of moisture damage typically makes water leakage the more