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A commercial building is undergoing a renovation, and the existing floor insulation is inadequate. What is the minimum R-value of floor insulation required for the occupied space according to the 2021 IBC?

ICC B2 exam practice question · Floor Construction

A commercial building is undergoing a renovation, and the existing floor insulation is inadequate. What is the minimum R-value of floor insulation required for the occupied space according to the 2021 IBC?

  • AR-19
  • R-25
  • CR-30
  • DR-35

Exam tip

Always check the specific R-value requirements for floor insulation in occupied spaces.

Why B is correct

According to Section 806.1.1 of the 2021 IBC, the minimum R-value of floor insulation for occupied spaces is R-25. Options A, C, and D are not the minimum required R-value.

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