Is creating vapour resistant barrier on both inside and outside of a cellulose fill wall advisable?
Reading the Fine Building Mag artical 'Designed for Success' (link below) I noticed the 16" double stud wall assembly had a layer of spray foam on the exterior sheeting (couple of inches) with the remaining wall filled with dense pack cellilos and closed with a 6mm poly vapor barrier . With the closed cell spray foam and the poly rap I am assuming moister in the wall is not a concern - why? Is this wall type safe in all climate zones including extream cold - we get 8000 hdd with many days sub -40. Why isn't the due point a consern? Science based feedback would be helpful.
Posted Sat, 01/18/2014 - 17:21
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