insulation against exterior brick

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  #1  
Old 04-26-11, 05:35 PM
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insulation against exterior brick

Hi all.
I am tearing out my kitchen to the studs and want to insulate the walls. The house was built about 1920 and there is currently no insulation. Walls are plaster & lathe on 2x4 and then exterior brick.I was planning on using Roxul but need to know if it is okay to put the batts directly against the exterior brick. Is this common practice or do I have to worry about moisture wicking through the brick or mortar and wetting the insulation ? Is there some other form of insulation that would work better in this situation ?
Thanks for any advice
 
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  #2  
Old 04-26-11, 05:54 PM
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Hi Martin,
generally you want an air space on the inside of the brick to allow it to dry properly. I'll attach a link that goes over some of the issues.
BSD-106: Understanding Vapor Barriers — Building Science Information

Bud
 
  #3  
Old 04-29-11, 07:53 PM
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Thanks Bud. Interesting reading but holy cow. Whouda thunk there would be so may variations! I should have the interior torn out buy late tomorrow and hopefully will have enough room to leave an airspace. If not ,I guess I'll just have to leave it uninsulated and keep microwaving my coffee cup before I pour one.
 
  #4  
Old 04-30-11, 05:12 AM
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You probably have furring strips behind the plaster. Consider putting rigid foam board over your furring strips and then your drywall.
 
  #5  
Old 04-30-11, 06:11 AM
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Thanks drooplug thats a great idea
 
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