Illinois Roofing Practice Exam

Which statement most accurately describes architectural metal roofing assemblies?

1. They require continuous or closely spaced decking.

2. The use of underlayment is optional.

3. They are best suited for steep slope roofs.

4. They do not require fasteners.

The correct answer is: They require continuous or closely spaced decking.

Architectural metal roofing assemblies indeed require continuous or closely spaced decking. This is crucial because it provides a solid substrate for the metal panels, ensuring stability, proper drainage, and minimizing the risk of water infiltration. Continuous decking supports the metal panels effectively, reducing the likelihood of noise and movement due to wind or thermal expansion. This structural support is vital for the performance and longevity of the roofing system. While underlayment is an important component for providing an additional layer of protection against water, it is not optional in all situations and often depends on local building codes and specific product requirements. Architectural metal roofs can be installed on various slopes, but they shine especially on steep slopes to facilitate water runoff and promote adequate drainage. Fasteners are generally required to secure metal panels to the decking to prevent wind uplift and ensure the roof remains intact over time.