Custom Home- Is A Chimney In A Roof Valley A Bad Idea?
Absolutely! A roof valley is created anytime two roof planes come together. A roof valley is basically a chanel for water. That means, lots of water will be traveling down this roof and run smack dab into the chimney. Of course, a good Builder will place a cricket on the back side of the chimney to divert water around it but the situation is certainly not ideal. A cricket is a wedge shaped roof that is created by framing a false roof over the upper valley so water is diverted around an obstruction in the roof.
Bottom line, a chimney in a roof valley is a bad idea and is creating a situation that will be an ongoing problem for the life of the home. The building team, (Owner, Builder and Architecet) should have created a different solution to this issue by redesigning the roof or relocating the chimney.
A fireplace chimney located in a roof valley is definitely a bad idea.
Have an awesome day!
Mike
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