Heat Loss

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  #1  
Old 12-08-07, 11:51 AM
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Heat Loss

Any way to estmate how much air/heat loss I was having in this spot? Its a tiny spot where the frame of a kneewall access door rests on the sloping roof leading to a storage area between my dormers. I saw this after our 1st snowfall and sealed it pretty well now but since the snow is gone now i gotta wait till we get more and i can see the results. But this "hole" has existed sucking air (i could feel the draft on my hand once i knew where to look) probably since the house was built in the 1950s. Looks like i am losing some heat at the dormer walls too. Thoughts?
http://i230.photobucket.com/albums/e...m/P1010059.jpg
http://i230.photobucket.com/albums/e...m/P1010070.jpg

This is a pic of my back large eyebrow-like roof.
http://i230.photobucket.com/albums/e...m/P1010045.jpg
http://i230.photobucket.com/albums/e...m/P1010049.jpg

It spans across the back of a room over the garage to the kitchen and an upstairs bathroom. So half of the wall of each story is covered by this roof:all the stud and floor joist bays and rim joist are in here. The only sheathing covering it are the planks maybe 1X6's? with gaps run btw each one of them. I already cut into here thru the garage ceiling weeks ago and plan to sheath/airseal it better and blow in the floor joists and stud bays but do these pics show i was right in thinking im getting lots of air/heat loss here?
 
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  #2  
Old 12-09-07, 04:01 PM
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Bumping this to the top to see if anyone has a thought. thanks
 
  #3  
Old 12-09-07, 04:28 PM
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http://www.eere.energy.gov/buildings...pdfs/26447.pdf

The fourth page on this site discusses your problem and provides some solutions.
 
  #4  
Old 12-09-07, 07:31 PM
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Thanks for the reply. I did read that pdf a good while ago and have already put in place all the recommendations that applied to my situation. The leak at the front of the house is hard to describe but it was an interior wall intersecting the front of the kneewall ( now completely sealed) like a "T" right where the slope begins. On either side theres rafter space with insulation but the open wall is resting on rafter and leaking air right at that junction. Like i said its all sealed now after i saw this but i was just interested in how big of a leak it was due to the large snow melt.
I was more interested in the 2nd set of photos to see if the snowmelt there is normal or evidence of heatloss. The back has an eyebrow roof not a kneewall situation. IR would be great but it can be expensive in this area. thanks.
 
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