| Author | Message | ||
     Joe Jenkins Senior Member Username: Joe Post Number: 90 Registered: 07-2006 |
The "W" valley (inverted "V" groove) breaks the hydrostatic pressure as water drains from the steeper slope onto the less steep slope and forces the water to run down the valley rather than onto the less steep slope. That's why it's used when you have two asymmetrical roof slopes, or a large slope draining onto a small one. | ||
| jason winfrey Junior Member Username: 1roofpro Post Number: 14 Registered: 09-2006 |
the w valley isnt really restoration correct,but it is what i would use in your situation. the benefits far outweigh the looks & only a roofer will probably notice the differance | ||
| Mark Dullea New member Username: Sammy Post Number: 1 Registered: 04-2007 |
I am working on a project with a two pitches. The top of the roof is 20:12 and it transitions to a 10:12 roof. We are using 20oz. copper in the open valleys and want to know the pros and cons of using a 'V' vs. 'W' shape valley flashing. Everything I have read leads me toward using the 'W' shape profile. |
