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What is the minimum height requirement for exterior doorways to ensure proper drainage?

  1. 4 inches

  2. 6 inches

  3. 8 inches

  4. 10 inches

The correct answer is: 6 inches

The minimum height requirement for exterior doorways to ensure proper drainage is 6 inches. This guideline is important for preventing water intrusion beneath the door, which can lead to moisture problems, mold growth, and damage to the structure over time. By maintaining a height of at least 6 inches, any water that may accumulate at the front of the doorway is effectively directed away from the entrance and reduces the chances of water seeping into the home. This height aligns with best practices for site drainage and ensures that door thresholds remain effective barriers against rain and runoff.