40 Hour Property and Building Inspection Practice Test

What is a potential issue with roof slopes that have a ratio of 1/12?

1. Increased thermal efficiency

2. Leaking or delamination

3. Enhanced drainage

4. Longer lifespan of roofing materials

The correct answer is: Leaking or delamination

Roof slopes that have a ratio of 1/12 are considered very low-slope or nearly flat. Such low slopes can lead to various challenges, particularly in terms of water drainage. When the slope is minimal, it becomes more difficult for rainwater to naturally flow off the roof, which can lead to water pooling in certain areas. This standing water can result in premature deterioration of roofing materials, promote leaks, and lead to delamination, especially if the roofing system is not designed to handle such conditions. Since water can linger, it increases the likelihood of water infiltration through seams or weak spots, thereby causing damage over time. Proper drainage systems and materials are critical in these scenarios to mitigate the risks associated with low-slope roofs. Thus, the potential issue with a roof slope of 1/12 notably includes the risk of leaking or delamination due to inadequate drainage.