Coastal and Floodplain Construction Inspector's Practice Exam

In areas of high winds, fasteners for underlayment should be applied at a maximum spacing of how many inches?

1. 24 inches

2. 30 inches

3. 36 inches

4. 48 inches

The correct answer is: 36 inches

In areas subject to high winds, the proper application of fasteners for underlayment is critical to ensure structural integrity and to prevent damage caused by wind uplift. Using a maximum spacing of 36 inches for fasteners helps ensure that the underlayment remains securely attached to the substrate, minimizing the risk of it being lifted or torn away by strong winds. This spacing recommendation is aligned with typical wind load requirements and helps to distribute the forces acting on the underlayment more evenly. As wind speeds increase, the forces exerted on building materials also rise, and appropriate fastening techniques are necessary to withstand these conditions. Fasteners placed at greater intervals could leave the underlayment more susceptible to being displaced, resulting in potential leaks or other failures. Therefore, maintaining a maximum spacing of 36 inches ensures that the underlayment provides adequate protection against wind, enhancing the overall resilience of the structure. This attention to detail is especially important for construction in coastal and floodplain areas where extreme weather conditions are more common.