Latest Discussions : HVAC

JonathanGennick

05:24AM | 12/28/04
Member Since: 11/02/02
69 lifetime posts
I have a serious ice-dam problem on one side of my house. In looking around the attic, I see that the area above the soffits was completely filled in with some extra, blown-in insulation that was added some years ago by a previous owner. So far as I can tell, when the house was built, the area above the soffits was not insulated.

Is it possible that this blown-in fill in my soffit area is contributing to ice formation on my roof? If so, what's the best process to remove that blown-in insulation?

Jonathan Gennick
" target="blank">http://gennick.com


theeagle

07:07PM | 12/28/04
Member Since: 11/27/04
172 lifetime posts
without the air flowing past keeping the roof botom cool, ice dams can form as that area is being kept warmer. to remove extra insulation is always a pain as you can get your head filled with nail marks crawling in there with a hooked stick to pull back the insulation. or if you have a soffit that can be easily opened to put in rafter vents/shutes and put a batt of insulation on top of the stud wall.


JonathanGennick

03:31AM | 12/30/04
Member Since: 11/02/02
69 lifetime posts
Fortunately, I can crawl in easy enough. My roof has a steep pitch. I still have to crawl to get to the very the edges, but it's not so bad.

It's always bothered me that roofers let nails poke through the roof. It's not tidy to have nails sticking through like that. Oh well.

My neighbor tells me that since my soffits aren't vented that the insulation over them shouldn't matter. Is he right about that? If there aren't any soffit vents, there can't be any air-flow, right?

I have no ridge vents either. The vents are in the gables at either end of the attic.

Jonathan Gennick
" target="blank">http://gennick.com


dgalenski

03:45AM | 01/06/05
Member Since: 01/02/03
31 lifetime posts
Yes- it would help to have soffit vents. I don't know how much pulling ou the insulation will help if you don't have soffit vents. Gable vents are OK-but no match for vented soffits and ridge.

JonathanGennick

03:07AM | 01/13/05
Member Since: 11/02/02
69 lifetime posts
I want to follow up a bit on my own post. For years there's been a bathroom fan venting into the area of the attic underlying the ice-dams that form on my roof. (note: a previous homeowner installed that fan, not me) Finally, it occurred to me to take the fan out and seal up the hole in the cieling. Since doing that, I've not had ice form on that part of the roof. What's more, snow has cascaded ff that part of the roof just as it does from other parts.

Now, we haven't had much snow since I've removed the fan. I'd like to see the results from a few 4+ inch snowstorms to be absolutely certain that I've fixed the problem, but the results so far are surprisingly encouraging.

I'm going to install a new fan, but you can bet your bippy I'll vent it outside.

Jonathan Gennick
" target="blank">http://gennick.com




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