Illinois Roofing Practice Exam

Which statement most accurately describes nesting new metal deck panels in a low slope roofing system?

1. Nesting panels are meant to be attached to only one support

2. Nesting panels should be spaced far apart for better ventilation

3. Nesting panels should span joists over a minimum of 3 supports

4. Nesting panels should not be used in low slope roofing systems

The correct answer is: Nesting panels should span joists over a minimum of 3 supports

The choice that states nesting panels should span joists over a minimum of three supports accurately reflects the practice required for stability and structural integrity in low slope roofing systems. Properly spanning the panels helps distribute weight evenly and minimizes the risk of deformation or failure due to loads such as snow, water, or other environmental factors. Nesting panels are designed to interlock or overlap in a manner that ensures they remain securely in place as they cover the surface. By spanning multiple supports, the roofing system can maintain its strength and durability, which is critical in maintaining a watertight seal and overall performance of the roofing structure. The other options do not align with best practices in roofing. For instance, attaching panels to only one support can lead to structural weaknesses, and spacing panels far apart would compromise insulation and potentially allow for water pooling. Additionally, while low slope roofing systems can use nesting panels, claiming they should not be used at all fails to recognize their effectiveness when installed correctly.