How many valleys are there at all roof areas?

How many valleys are there at all roof areas?

• A. 5 Valleys
• B. 7 Valleys
• C. 6 Valleys
• D. 8 Valleys

Answer: (B)

Valleys are the V-shaped troughs formed where two roof planes meet and slope downward. To count them accurately, scan the entire roof and follow each place two different planes come together, tracing from the eave up to the ridge. Make sure you don’t double-count a valley that continues across a long run or across a jog where the valley changes direction.

In the diagram, there are seven distinct valleys across all roof areas. This accounts for interior valley lines as well as any valleys created where roof sections join. If you counted five, six, or eight, you’d either be missing a valley or counting a ridge segment by mistake. Seven is the complete, correct total for all roof areas.