attic temp

attic temp

PostBy: arcticcatmatt On: Tue Jan 27, 2009 3:57 pm

Not sure if this is the correct area of the forum to talk about this but its my best guess.

I have a single floor 1150 sqft ranch with uninsulated basement and attached garage. I was up in my attic yesterday to work on the install of a new bathroom vent. This is the first time in my attic (new homeowner). To my surprise, the entire thing has maybe 14 inches of shredded insulation on the floor. I didn't know where to walk so I didn't.

It was probably 45 degrees up there! It was 74 degrees downstairs, and 65 in my basement. Seems like this stuff is doing its job well.
arcticcatmatt
 
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Re: attic temp

PostBy: sterling40man On: Tue Jan 27, 2009 4:37 pm

arcticcatmatt wrote:To my surprise, the entire thing has maybe 14 inches of shredded insulation on the floor.


matt, 14" of insulation is great. The general rule is that your attic should be within a few degrees of the outside temp, provided that you have enough air getting through it (gable vents, vented eaves, ridge vents). You don't want your attic warm. It will start to get condensation and it will leak.


arcticcatmatt wrote:It was probably 45 degrees up there! It was 74 degrees downstairs, and 65 in my basement. Seems like this stuff is doing its job well.


45* seems to warm. Mine is cooler at maybe 30* or lower, but I've never checked it with a thermometer. Heat rises, so you will always lose some to the attic.

arcticcatmatt wrote:I didn't know where to walk so I didn't.


Walk on the trusses. Just think of a truss as a tringle. You may not see the bottom, but you know it's there.

Hope this helped.

Bob
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Re: attic temp

PostBy: Devil505 On: Tue Jan 27, 2009 7:55 pm

A good rule of thumb is to watch the snow on your roof. If it melts quickly you need more insulation. (You can even see where the insulation is needed by where the bare spots are)
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Re: attic temp

PostBy: arcticcatmatt On: Tue Jan 27, 2009 11:43 pm

My roof is a 3 year old metal roof. As soon as the sun comes out, poof, it slides off.

I was guessing at 40 degrees up there.. All I know is that is was cold haha.

Thanks for the tips! After working on my bathroom vent more tonight, I have decided that it would be 100x easier to be able to access it from the top! Damn thing. Its going to be a treat getting over to it.
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Stove/Furnace Make: Alaska Kodiak Stoker II

Re: attic temp

PostBy: WNY On: Wed Jan 28, 2009 8:25 am

Ours stays pretty cold, not much snow melts off the roof.

I have the same problem in 3/4 of my attic, they blew in 2x the height of the rafters, so I have about 12-14" approx, so I can't find the rafters easily either. Funny, I tripped over something, It was a Huge TV Antenna they buried with insulation, I put string on it and hung it back up in the rafters. Our local cable lost our CBS channel for like a month, and we had to use the TV antenna to get it! Works pretty good!! :)
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Re: attic temp

PostBy: arcticcatmatt On: Thu Jan 29, 2009 12:43 am

Well I found my way across all of it tonight to install the new wire. It seems that my house has a layer of fiberglass insulation and then maybe 15 inches of the blown insulation on top of that, very light and dusty crap.

I moved it with my hands to find the beams where I could walk. Next time I go up there, I am wearing a face mask! I inhaled more of the dust than I should have haha.
arcticcatmatt
 
Stove/Furnace Make: Alaska Kodiak Stoker II

Re: attic temp

PostBy: sterling40man On: Thu Jan 29, 2009 1:30 am

Glad that it worked out for you matt. Does the blown-in insulation look like the pic below? If it is, it's nasty stuff. You definately want to wear a mask.

Bob
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Re: attic temp

PostBy: arcticcatmatt On: Thu Jan 29, 2009 10:17 am

^ Yep sure does, except mine is flat across. I will take a picture of it tonight.

I thought "ahh its just celluse and dust. Won't kill me or hurt me" blah.. now my throat hurts.

I will be wearing a mask for when I go to cover the studs back up that I walked on!
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