INSULATING CONCRETE WALLS OF GARAGE

QUESTION FROM RANDY OF SANFORD, MAINE:

I am renovating my garage and framing and insulating it.  The walls are concrete block .

An architect told me to install a poly vapor barrier to the inside of the block walls, then frame the wood walls leaving a one inch space from the block.  He told me to blow in cellulose into the wall cavities but I would prefer to use fiberglass batts.

 Should I use unfaced with no vapor barrier on the inside or a kraft faced with the kraft towards the heated inside?

Thanks
ANSWER FROM THE INSULATION DOCTOR:
Thank you for your question.  I personally would disagree with your architect on installing poly between the stud wall and the block.  My experience has been that when this method is used, for whatever reason, moisture gets thru the block and is trapped by the poly and you end up with mold.  If you have installed the poly, I would recommend that you remove it or cut out as much of  it as possible.
 
Then install kraft-backed fiberglas blanket in the stud spaces with the kraft paper facing toward the heated area.
 
Hope this helps.

Bruce Jones
The Insulation Doctor

 


Disclaimer:   The material on this website is to be used for informational purposes only and is not meant to substitute for any particular application due to geographic location and other unknown variances.  Links to other websites are included for the user's convenience only and do not constitute an endorsement of the material on those sites. 
 
 

 

 
Make a Free Website with Yola.