North Carolina Building Contractor License Practice Exam

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A 32 inch door should have a rough opening of what measurement?

  1. 30 inches

  2. 32 inches

  3. 34 inches

  4. 36 inches

The correct answer is: 34 inches

For a standard 32-inch door, the rough opening should be wider to accommodate the door frame, which includes the door itself, any shimming or spacers that might be needed for proper installation, and the necessary clearance for the door to swing open without obstruction. The standard practice is to add 2 inches to the door width for the rough opening to ensure that there is enough space for a proper and secure installation. Therefore, for a 32-inch door, the rough opening would typically measure 34 inches. This additional space allows for proper alignment, leveling, and installation of the door frame, ensuring that the door operates smoothly and fits correctly once installed.