When installing step flashing on a composition shingle roof in California, what is the required overlap between successive pieces of step flashing?
Correct Answer
A) 3 inches minimum
CRC Section R903.2.1 requires step flashing pieces to overlap each other by a minimum of 3 inches. This overlap ensures continuous water protection at the intersection of the roof and vertical surfaces, preventing water infiltration that could lead to structural damage.
Why This Is the Correct Answer
CRC Section R903.2.1 requires step flashing pieces to overlap each other by a minimum of 3 inches. This overlap ensures continuous water protection at the intersection of the roof and vertical surfaces, preventing water infiltration that could lead to structural damage.
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