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Valleys

Area in which two adjoining sloped roof planes intersect on a roof, creating a “V” shaped depression. Formed by the intersection of two sloping roof...

Vapor Retarder

Any type of material that is used to prevent the passage or bleedthrough of water...

Vent

Any outlet for air or fumes that protrudes through the roof deck such as a pipe or stack. Any device installed on the roof, gable or soffit for the purpose of ventilating the underside of the roof deck is a...

Vent Sleeve

A sleeve that covers over an exposed vent to prevent unwanted animals or...