North Carolina Building Contractor License Practice Exam

What is the typical exposure while using roll roofing products?

1. 12 inches

2. 36 inches

3. 20 inches

4. 24 inches

The correct answer is: 24 inches

The typical exposure for roll roofing products is 24 inches. This measurement refers to the amount of roll roofing that is exposed to the elements after installation. Roll roofing is often used for flat or low-slope roofs, and the 24-inch exposure is standard because it helps to ensure adequate water shedding while allowing for efficient installation. Using a 24-inch exposure helps to minimize the risk of leaks and enhances the overall performance of the roofing system. It strikes a balance between adequate coverage and material efficiency, ensuring that the roofing material will adequately protect the building from moisture and adverse weather conditions. This exposure size is also in line with industry practices, making it easier to implement and follow standardized installation procedures. Understanding this exposure is crucial for contractors and builders, as improper exposure could lead to potential water infiltration issues, which would undermine the longevity and effectiveness of the roof.