Cast iron to pvc roof vent
Asked Nov 14, 2010, 09:26 AM
I'm having a new roof installed and the roof vent is cast iron with some kind of lip on the end which won't allow a standard roof flashing ring to go over it. Can I cut the cast iron w/sawzall below the roof line about 3 feet and transition to pvc through the roof to allow a proper flahing kit to avoid further leaks.How high above roof must the pipe extend and can I use a 4 band clamp for the connection. I live in Massachusetts. Thanks for your help.