I've got a pathetically short little vent on the roof of my house that the upstairs bathroom fan is attached to. The house also has a very shallow pitch, so it collects a lot of snow rather than shedding it. It only takes
3 or 4 inches of snow cover to completely submerge the vent - this means its melting snow - which caused an ice dam and water to back up last year (our first year in the house).so this year, i'm playing safe - have a ladder and roof rake at the ready on the deck so that if it snows any significant amount, I can clear an area around the vent so it doesn't cause another ice dam.
problem - my wife doesn't listen. on a few occaisions now we'd had notable snowfall - and yet she still used the fan in the morning. yes - I now have a buildup of ice downstream from the vent (which is about 4 feet from the eave of the house). there is a bare spot of about 12" round from her using it again this morning!! I'm now worried if we go much further with it, we'll for sure have another ice dam...
- other than expensive and clumsy electric wire solutions, what can I use to perform a 1-time thawing of this ice buildup - just so it doesn't allow an ice dam to form? I was thinking about a chemical ice melter. I've seen them recommend it for roofs before....
- there is such a thing as a much taller bathroom vent, right? what is a typical charge for a roofer to come in and replace the crappy small one with one of substantially more height? (I'd need one about 14" tall if possible) I'm looking for a ballpark so the roofer doesn't try and rip me off.
- since the situation is much "after the fact", installing de-icing cables will be a pain, if not impossible. any other solutions to opening up the area right in front of the vent....in case wifey forgets /yet again/ ?
thanks for all the insight...
b