Question

Metal valley flashing should be a minimum of ___ inches wide?

1) 8
2) 12
3) 18
4) 24

Answer 1

The correct width for metal valley flashing in roofing practices is 24 inches. This width provides adequate coverage to ensure proper water runoff and overlapping is crucial to prevent leaks where roof planes meet at a valley.

Step-by-step explanation:

The width of metal valley flashing should be a minimum.

Based on standard roofing practices, the correct width for metal valley flashing is 24 inches wide. Flashing is an important component in roofing that helps to prevent water from penetrating the building and causing damage. The 24-inch width provides adequate coverage to ensure that water runoff is directed away from the roof joints and down into the gutters. A sufficient overlap in the flashing is crucial to prevent leaks, particularly in areas where heavy rain is common or where two roof planes meet at a valley.