Can I or can't I?

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  #1  
Old 08-30-02, 08:51 AM
mheadboy
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Can I or can't I?

Is it ok to use fiberglass insulation against concrete walls in my basement? I'm in CO and the basement is very dry.
 
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  #2  
Old 08-30-02, 04:29 PM
rbisys
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Greetings,

By all means if you don't mind condensation and mold.

You can install a 95% effient radiant barrier and eliminate the condensation and mold and have a warmer basement.

How do youy plan to furr out? If you do not plan to have electrical out lets on the out side walls you can use 1x2 and a single radiant barrier.

Thank you for considering my opinion.
 
  #3  
Old 08-30-02, 08:49 PM
mheadboy
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I'm furring out with metal stud, and I do plan to have electrical in the wall. If I place plastic against the concrete will that act as a vapor barrier?
 
  #4  
Old 08-30-02, 09:36 PM
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Join Date: Nov 2001
Location: USA
Posts: 1,873
You can go to http://www.ornl.gov/roofs%2bwalls/facts/index.html and read "Builder Foundation Handbook" it is written by Oak Ridge National Laboratory. You can also go to http://www.eren.doe.gov/consumerinfo/refbriefs/bd4.html it is written for the U. S. Dept. of Energy on vapor barriers. The whole page is good, but you want to pay special attention to "Thermal-Moisture Dynamic." You can also go to my message board where I answered a simlar question some time ago at http://resercon.com/msgboard.mv?parm...msgnum=1000011 It discusses how moisture occurs with insulation installed in basements and how to avoid it. I do not wish to confuse you but there are basically 3 ways heat is transferred, conduction, convection and radiant. With insulation it is heat that carries the moisture. All 3 links discusses diffusion which is a mechanism used in conduction.
 
  #5  
Old 09-02-02, 01:14 PM
rbisys
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Greetings,

Installing pastic on the concrete will not prevent moisture getting to the fiberglass. Why even consider a product that is less than 10% efficient and subject to mold.

You can install a 4 mil radiant barrier against wall letting it drape to the floor and then installing your wall. This way you have 100% coverage, easy to install and no mold problems. PLUS you have a superior vapor barrier.

Thank you for considering my opinion.
 
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