Bath Fan Roof Hood Creating Ice Dam - Kitchen & Bath Remodeling - DIY Chatroom Home Improvement Forum

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Old 01-08-2014, 08:02 PM   #1
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bath fan roof hood creating ice dam

I remodeled my bath a couple years ago and thought I was being wise by installing a vent fan. I went through the roof with it using a common hood that directs the moist air right on the roof creating a big ice dam! It's very cold here in northern Minnesota!! Is there something different I can use on the roof that is higher to help this problem?


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Old 01-08-2014, 08:09 PM   #2
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It will always do that, due to the warm moist air, is reacting to the cold pile of snow around the vent. You need a Roof Rake, to get the snow off of your roof, to stop it. Also making sure that your bath fan has a self closing damper on it, to not let house air out through the vent, when it is not running.


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Old 01-08-2014, 08:51 PM   #3
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Thanks for the info. There's been times when there was no snow on the roof and this still happens!! Isn't there a different type of hood,pipe, something that will let this exhaust up higher and not right on to the roof?
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