What essential feature must a flat roof have to ensure effective drainage?

What essential feature must a flat roof have to ensure effective drainage?

• A. Zero slope
• B. Some slope
• C. Steep incline
• D. Flat surface

Answer: (B)

A flat roof must have some slope to ensure effective drainage. The slight slope directs water towards drainage points, preventing water accumulation that could lead to leaks, damage, or structural issues. While a zero slope might sound beneficial for a roof's flat design, it can actually create standing water situations, leading to increased wear and the potential for leaks over time. A steep incline would also not be practical for flat roof designs, as it goes against their intended structure. A flat surface is a characteristic of flat roofs, but without the necessary slope, it does not fulfill the functional requirement for proper drainage. Thus, incorporating some level of slope is crucial for maintaining the roof's integrity and ensuring water flows away efficiently.

A flat roof must have some slope to ensure effective drainage. The slight slope directs water towards drainage points, preventing water accumulation that could lead to leaks, damage, or structural issues.

While a zero slope might sound beneficial for a roof's flat design, it can actually create standing water situations, leading to increased wear and the potential for leaks over time. A steep incline would also not be practical for flat roof designs, as it goes against their intended structure. A flat surface is a characteristic of flat roofs, but without the necessary slope, it does not fulfill the functional requirement for proper drainage. Thus, incorporating some level of slope is crucial for maintaining the roof's integrity and ensuring water flows away efficiently.