Is it OK to use R-30 on ext walls?

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  #1  
Old 08-24-08, 05:31 AM
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Is it OK to use R-30 on ext walls?

In my bathroom has R-13 on the exterior walls that was doubled up. The studs are deep enough to allow back-to-back depth of 2 R-13 sheets.

If I have the room, can I use R-30 on an exterior 2x4 wall? Would it be better?
 
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  #2  
Old 08-25-08, 04:22 PM
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If your walls are 2x4 then the only insulation you can install is R-13. If you install anything thicker you will only compress the insulation and defeat it's purpose.
Are you planning on insulating from the inside or outside?
Thanks for listening.
 
  #3  
Old 08-25-08, 07:10 PM
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from the inside but my exterior walls. i used the r-13 and is it OK that the insulation covers the electrical wire that is stapled in the wall between 2 studs ??. And I insulated all around my IC recessed lights. is this ok?
 
  #4  
Old 08-27-08, 09:11 PM
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Covering the wires is fine and around the lights as long as you leave a bit of room around the lights. No insulation touching or covering the lights.
Thanks for listening.
 
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