Replies

1. 
   TrimButcher | Dec 22, 2003 06:16am | #1

   I've attached a diagram of what I think you're describing.  Feel free to send me large amounts of cash so that I can finally go to art school.

   The "crawl space" is coloured green; you want to fill it with insulation. Why can't you vent through the underside of the overhanging joists (the red line in my diagram)? 

   What's your weather (whereabouts you located)?

   No venting = very bad idea

   Regards,

   Tim Ruttan

   
2. 
   HeavyDuty | Dec 22, 2003 09:00am | #2

   If Tim's drawing is what you have, venting through the overhang shouldn't be a problem. The other thing is where is and what kind of existing roof insulation do you have? It would help if you could provide a diagram.

   Is the second floor an attic conversion?

   Is there any condensation problem so far? As Tim said your climate has a lot to do with the whole situation.

   Cold roof vs warm roof have been thrown around and argued time and time again on BT. If you do a search you may be lucky enough to come up with something. Again I don't trust that prospero thing too much.

   
   

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   Edited 12/22/2003 1:01:41 AM ET by TOMCHARK

1. 
   Cletrac | Dec 22, 2003 02:41pm | #3

   I live In Granville MA. The attic space over the kitchen was converted to a bedroom many years ago. There is a finished ceiling in the room. I am trying to find ways to add insulation where I can and stop air leaks. The attached file I hope will explain how the floor is constructed.

   Thank you

   Dave

1. 
   Cletrac | Dec 22, 2003 02:51pm | #4

   For some reason I can not attach a file. The drawing attached to the message from Tom is not quite correct. The floor joists that create the second floor over the kitchen extend beyond the outside walls of the first floor by 8" The roof is built on that platform to create an overhang rather than just the rafter tails running past the outside walls to create the overhang.

   Thanks

   (I will try to attach the sketch again)

   Dave

1. 
   SamT | Dec 22, 2003 04:31pm | #7

   Here's a smaller version of Daves' pic.

   "You will do me the justice to remember that I have always strenuously supported the right of every man to his opinion, however different that opinion may be to mine. He who denies to another this right, makes a slave of himself to his present opinion, because he precludes himself the right of changing it."   Thomas Paine

3. 
   MisterT | Dec 22, 2003 03:17pm | #5

   Dave,

   Do this:

   (see Jpeg)

   You may need to cut a swath in your floor sheathing if it goes all the way to to end of the joists.

   Mr T

   Do not try this at home!

   I am an Experienced Professional!

   
   

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   Edited 12/22/2003 7:20:34 AM ET by Mr T

1. 
   MisterT | Dec 22, 2003 03:21pm | #6

   OOPS!Mr T

   Do not try this at home!

   I am an Experienced Professional!