North Carolina Building Contractor License Practice Exam

What is the minimum slope required for corrugated or flat plastic skylights?

1. 0.01 inches

2. 0.02 inches

3. 0.024 inches

4. 0.03 inches

The correct answer is: 0.024 inches

The correct choice for the minimum slope required for corrugated or flat plastic skylights is indeed 0.024 inches. This minimum slope is crucial to ensure proper drainage of water that may accumulate on the surface of the skylight. If the slope is insufficient, water can pool, leading to potential issues such as leakage, structural deterioration, and accumulated debris that can impair transparency and light transmission. Setting the minimum slope at 0.024 inches facilitates not just drainage but also enhances the longevity of the skylight material, as it minimizes stress and wear caused by stagnant water. This slope is also aligned with industry best practices, ensuring that when skylights are installed, they function effectively over time without risking water ingress into the building structure. In contrast to slopes that are lower than this required standard, a significant risk of water infiltration and related issues exists, which could undermine the integrity and performance of the skylight.