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Old 02-02-2009, 11:06 PM   #1
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insulating converted garage/room


I am taking the paneling off a room that was an attached garage converted to a room. The walls are 2X4, but then they have 3/4 inch cork like material between the studs and the outer wall. It's not exactly cork. The material is mostly between the outer wall and the studs. So in many places I could place another 3/4" of insulation. Initially I was going to go with the R13 faced batts for 2X4 walls, but I could fit in a little more insulation, but the R19 faced batts are for 2X6 walls so the insulation would be compressed.

Any suggestions what I should put up? Just stay with the R13?

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Old 02-02-2009, 11:14 PM   #2
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insulating converted garage/room


R19 compressed into a 2x4 wall will give you R13

Stick with R-13 or R-15 - made for a 2x4 wall
Compressing insulation reduces its RValue

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Old 02-03-2009, 08:00 AM   #3
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insulating converted garage/room


That's kind of what I was thinking, just hated to not make best use of the areas that are basically 2X5.
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Old 02-03-2009, 02:22 PM   #4
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insulating converted garage/room


I'd go with R15 then
It will give you a better R value then the compressed R19
If you want buy some rigid foam board & fill the extra inch
Some people also "peel" fiberglass insulation thinner & use that to fill in
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