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Old 02-04-2011, 12:07 PM   #1
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Insulating Interior/Exterior Wall Cavity? Old Home from Attic


I was wondering if it is ok to put insulation down the exterior wall cavity from the attic for the 2nd floor of a home?

I just redid all of the attic insulation and cleaned everything up, and I noticed that in some spots on the sides of the home I can see right down the wall cavity between the exterior of the home, and the plaster wall on the interior. The space between the framing seems to go down to about the floor on the second floor area, or just a bit shorter.

Is it ok to put insulation down these cavities? Or must there be some type of ventilation space? Seems like I should be able to put insulation down these areas since that is what is done when a home is framed and insulated.

Can someone confirm if this is ideal? Also, should I be trying to stuff batts or rolls of the pink stuff down, or would it be ok to get the shredded blow type insulation and manually stuff it down the walls from the attic?

Any tips appreciated.


Last edited by HandyFrank; 02-04-2011 at 12:09 PM.
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Old 02-04-2011, 04:28 PM   #2
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Insulating Interior/Exterior Wall Cavity? Old Home from Attic


Quote:
Is it ok to put insulation down these cavities?
Ayuh,... Absolutely,....
When I did it for my Dad way back when, I stuffed rockwool into 'em, with a stick...
Today,..
I'd thing some sorta Blown-in would be the way to go....
If you've got access, fill 'em up any way ya can, with whatever works for ya...

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Old 02-05-2011, 12:05 AM   #3
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Insulating Interior/Exterior Wall Cavity? Old Home from Attic


Yes, do it! That is the main problem with balloon framed houses, you have "The stack effect"; http://www.wag-aic.org/1999/WAG_99_baker.pdf

Use a medium density insulation of blow in; either f.g. or cellulose without convective loops; http://www.diychatroom.com/f98/how-b...ulation-90438/

http://www.google.com/url?sa=t&sourc...O842EQ&cad=rja

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Old 02-07-2011, 10:49 AM   #4
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Insulating Interior/Exterior Wall Cavity? Old Home from Attic


Thanks for the tips guys, and good PDF and links, explains a lot.

Sounds like I will be getting some blow insulation and fill the walls soon
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