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I'm trying to decide between flash and fill (BIB) and all open cell foam for exterior walls.

by LiveModern Webmaster last modified Jan 29, 2013 01:01 AM
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by last modified Jan 28, 2013

Hi, I live in MD in climate zone 4 below Baltimore, but almost 5. We are building a house with 2x6 walls 16" OC all brick exterior. I have an estimate for 1 inch closed cell then blown in fiberglass fill and a quote for all open cell foam. The all open cell is 30% more, should I be worried about condensation in walls and go with the all open cell foam or will I be safe in this climate zone with the flash and fill. My neighbor did the flash and fill however only on 1 wall not all without any issues. I need to decide soon and am confused on which way to go. 




 

 

Hi, I live in MD in climate zone 4 below Baltimore, but almost 5. We are building a house with 2x6 walls 16" OC all brick exterior. I have an estimate for 1 inch closed cell then blown in fiberglass fill and a quote for all open cell foam. The all open cell is 30% more, should I be worried about condensation in walls and go with the all open cell foam or will I be safe in this climate zone with the flash and fill. My neighbor did the flash and fill however only on 1 wall not all without any issues. I need to decide soon and am confused on which way to go. 

Sunil,

If you wish to proceed with the Flash and fill technique you will need to install 2" of closed cell foam to achieve the proper vapor barrier.

This additional 1 inch...


 

 

 
 
 

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