California Residential Inspector Practice Exam

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Prepare for the California Residential Inspector Exam. Utilize interactive quizzes and detailed explanations to master the required knowledge. Enhance your test-taking skills and boost your confidence for achieving high scores!

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What is the minimum overlap for water-resistive barriers applied over wall sheathing at the joints?

4 inches
6 inches
8 inches
10 inches

The correct answer is: 6 inches

The minimum overlap for water-resistive barriers applied over wall sheathing at the joints is specified to be 6 inches. This requirement is based on maintaining the integrity of the water-resistive barrier, ensuring that it effectively prevents water intrusion, which is critical for protecting the building envelope. Proper overlapping of the water-resistive barrier is essential to create a continuous layer that redirects water away from the sheathing and the interior structure. A 6-inch overlap helps to ensure that any water that might penetrate the barrier due to laps or cut edges is directed downwards and away from the wall assembly, effectively reducing the risk of moisture accumulation that could lead to damage or mold growth. Choosing an overlap that is too small may compromise the function of the barrier, while excessive overlap can lead to unnecessary material use and labor costs, making 6 inches the most balanced and efficient choice for this application.