North Carolina Residential General Contractor Practice Exam 2025 - Free Contractor Exam Practice Questions and Study Guide

When determining the required extension of a hearth on the sides for a fireplace that exceeds 6 square feet, building codes generally dictate specific measurements to ensure proper safety and functionality. In North Carolina, if the hearth's area is greater than 6 square feet, it is mandated to extend a minimum of 12 inches on each side.

This requirement is in place to mitigate the risk of fire hazards and to provide sufficient space for any embers or ash that may fall outside the fireplace. The additional width serves as a safety buffer to protect surrounding materials and reduce the likelihood of accidental fires spreading to the nearby areas of the home.

The other options, while they may seem plausible, do not meet the specified criteria set forth by building codes for hearth extensions when the area exceeds 6 square feet, which underscores the importance of understanding and adhering to local building regulations when constructing or renovating residential structures.