Home>Discussions>INSULATION & HVAC>Bathroom Fan Vent Causing Icicles
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vicktown
Bathroom Fan Vent Causing Icicles

I have been tackling the icicle problem at my 1902 stucco one and a half story in ontario canada with some success.

It now seems that the exhaust from the bathroom is causing enough melt on the roof directly below it to create icicles and ice damming.

The roof was just done this summer and I used this exhaust (http://www.homedepot.ca/product/roof-exhaust-hood-4-inch-black/959744

Any suggestions?

dj1
Re: Bathroom Fan Vent Causing Icicles

I tried to check your link, and I got a military supply site selling machine guns...

Anyway, here is a possibly relevant question for you: how tall is your vent outside the roof?

vicktown
Re: Bathroom Fan Vent Causing Icicles

Not tall enough...and not a machine gun

dj1
Re: Bathroom Fan Vent Causing Icicles

Check your local code, your vent may be too short. By extending it to code specs, you might be avoiding the damp and warm air causing icicles.

In my town we have no snow nor ice, and our vents extend about a foot over the roof, and some even higher than a foot.

vicktown
Re: Bathroom Fan Vent Causing Icicles

Just want to clarify that this is not the vent stack, but the bathroom fan exhaust. not sure that ive seen a product that extends above the roof line.

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