North Carolina Home Inspector Practice Exam

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Which type of valley construction is NOT commonly used on roofs today?

Open
Woven
Closed cut
Flat

The correct answer is: Flat

The type of valley construction that is not commonly used on roofs today is flat valley construction. This method involves laying the roofing material flat in the valley, which can lead to water pooling and increased susceptibility to leaks. In contrast, open valleys are typically formed with metal flashing or have a clear space to allow for easy drainage, making them a popular option for current roofing practices. Woven valleys integrate the shingles of both adjacent slopes, providing a seamless look while allowing for decent water flow. Closed cut valleys also deliver a finished appearance, where shingles are cut back and finished off to avoid overlapping the valley, creating a more aesthetic transition and protecting against water infiltration. Due to the advantages in performance and aesthetics offered by the other valley types, flat valley construction has become less common in modern roofing practices, opting instead for methods that provide better drainage and longer-lasting integrity.