A commercial building is being constructed with a built-up roofing system. The specifier requires a minimum thickness of the base sheet. Which of the following is the correct minimum thickness requirement as per the 2021 International Building Code (IBC) Section 1509.1.1?
- A0.25 inches
- 0.375 inches
- C0.5 inches
- D0.75 inches
Exam tip
Always check the specific section for the minimum thickness requirements of different roofing systems as they can vary.
Why B is correct
The correct answer is 0.375 inches. According to the 2021 IBC Section 1509.1.1, the minimum thickness of the base sheet in a built-up roofing system is 0.375 inches. The other options are either too thin or not specified as the minimum requirement.