North Carolina Building Contractor License Practice Exam

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What is the minimum overlap required for adjacent segments of the drip edge?

1 inch
2 inches
3 inches
4 inches

The correct answer is: 2 inches

The correct answer regarding the minimum overlap required for adjacent segments of the drip edge is 2 inches. This requirement is crucial in roofing installations because the drip edge helps direct water away from the fascia and can significantly affect the overall performance of the roofing system. Having a 2-inch overlap ensures that any water running off the roof and into the drip edge does not seep underneath the shingles or other roofing materials, which can lead to leaks and water damage. The overlap provides a redundancy that protects the areas where the segments meet, ensuring that the joints do not become a point of failure. This is an important detail for maintaining the integrity and lifespan of the roof, as water is one of the primary enemies of roofing materials. In contrast, smaller overlaps could potentially allow water to penetrate between the segments, which is not ideal for preventing leaks. Therefore, adhering to the 2-inch minimum overlap is a best practice recommended in many building codes and roofing guidelines.