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What is the absolute minimum slope away from a building that can be approved by an inspector?

  1. 1%

  2. 2%

  3. 3%

  4. 5%

The correct answer is: 2%

The minimum slope away from a building that is typically approved by an inspector is 2%. This requirement is established to ensure effective drainage away from the foundation. A slope of 2% means that for every 100 units of horizontal distance, the elevation drops by 2 units. This gradient is considered sufficient to prevent water from pooling near the building, which can cause foundation damage over time due to moisture infiltration or erosion. The focus on maintaining this minimum slope is essential for managing water runoff and protecting the structural integrity of the building. Inspections often require adherence to these guidelines to prevent future issues associated with drainage. A slope less than 2% may not effectively carry water away from the structure, increasing the risk of water-related damage, mold, or pest infestations.