Originally Posted By: Jon Keene
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I am in the process of changing my bathroom exhaust which was vented through the soffits. It was promoting ice daming in the area of the vent exit so I am going to vent it directly though the roof. My question is what if the best way to terminate the pipe through the roof. Let me start by saying I live in Maine where it is COLD and SNOWY in the winter. I have narrowed it to 2 methods to vent through the roof, but don’t know which is best and am looking for advice.
The first method is with a standard roof vent that is basically a covered 90 degree angled piece of metal with a screen and flapper on it. My concern with using this method is that it may cause ice daming at the point of exit with hot moist air blowing on a snow covered roof or having the exhaust get buried completely in snow and or having the damper freeze shut. Are any / all of these valid concerns?
The 2nd method is to run a straight piece of pipe up through the roof and extend is a foot or 2 above the roof and screen and cap it. My concerns here include moist air condensing on the pipe and running back down into the venting and/or freezing occuring in the pipe.
Anyone have any experience/thoughts on the best avenue to approach solving this problem. My goal is to only have to climb up on the roof once ![icon_biggrin.gif](upload://iKNGSw3qcRIEmXySa8gItY6Gczg.gif) and do it right the first time.
Any comments are appreciated