Answer :
Final answer:
Roll roofing is most commonly used in valley flashing detail. Valley flashing is used to protect the valleys where two roof lines intersect that form a 'V' shape from water leakage.
Explanation:
Roll roofing is most commonly used in valley flashing details. Valley flashing is an essential part of roof construction, particularly for houses with complex roof designs that have multiple valleys. When two roof lines intersect to form a 'V' shape, the valley formed needs to be protected from water leakage. This is where roll roofing comes in. It is laid down in the valley, then covered with shingles. Being weather-resistant and durable, it provides an added layer of protection to these vulnerable areas of the roof.
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