Illinois Roofing Practice Exam

Which of these is the most commonly used for copings in a low-slope metal roofing systems?

1. Gravel surfaces.

2. Wooden planks.

3. PVC pipes.

4. Metal caps to weatherproof the top of the parapet wall.

The correct answer is: Metal caps to weatherproof the top of the parapet wall.

The most commonly used material for copings in low-slope metal roofing systems is metal caps to weatherproof the top of the parapet wall. These metal caps are specifically designed to provide effective protection against water infiltration, which is critical in low-slope roofing applications where proper drainage can be a concern. Metal copings help to shed water away from the building and create a clean and finished look at the roof's edge. They are durable and can withstand various weather conditions, making them an excellent choice for enhancing the longevity and performance of the roofing system. Their reflective properties also help manage heat, which can be beneficial in reducing energy costs. Other materials, such as gravel surfaces, may be used in different roofing applications, but they are not suited for copings as they do not provide the same level of weatherproofing and edge protection as metal caps. Wooden planks and PVC pipes are also not appropriate options for copings, as they do not offer the necessary durability and weather resistance needed to ensure the effectiveness of the roofing system at the parapet wall.