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Question About Winter Roof Cap Installation

Hi all,

I'm new to the This Old House Community, and really forums and discussion threads in general so please bear with me if I do something wrong.

I've just installed a bathroom exhaust fan in our only bathroom because our new wallpaper has already started peeling after a week. However, it is February and we are in Michigan, so we have a lot of cold left to go before spring. Our house is brick, so rather than install a wall vent (we also have not place for a soffit vent) I bought everything I need to install a roof vent to get the moist air out. I really want to get this vent in so that I can save our new wallpaper.

So my question is, what's the best way to go about this in the winter time. I bought a Broan 636 roof cap

Basically, I think my only problem is choosing what roofing cement to use in the cold. Can I use this stuff called "Dewitt's Wet-Stick Roof Cement" in the cold?

Or will that compromise a good installation of the roof vent?

Thanks so much

MLB Construction
Re: Question About Winter Roof Cap Installation

keep the roofing cement in the house until right before you use it and it will be fine. watch this youtube video for a few tips.


Re: Question About Winter Roof Cap Installation

The above mentioned video is a good illustration on how to install vent flashing. As you can see, with the type of flashing this guy installed, he needed no roof cement at all (just a little tar on the nail heads).

If you plan on just cutting the roof, putting the vent on top of the shingles and tar around it - that will cause leaks. The roof vent must go under the shingles above it and cover the shingles below it. And that's true for all kinds of flashing.

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