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Académie
Roofing
NRCA ProCertification - Metal Panel Installer
Flashing, Trim, and Accessories
Vérification des connaissances
Flashing, Trim, and Accessories
Vérification des connaissances
Vérification des connaissances
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Where should fasteners be placed when securing W-valley flashing on a metal roof?
A
Alternating between the valley bottom and the outer edges
B
Under the panel ends where they overlap the valley flashing
C
Through the valley bottom at 12 inches on center
D
At the outer edges only - never through the valley bottom
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