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title=http://www.greenbuildingadvisor.com/blogs/dept/musings/dense-packed-cellulose-and-wrong-side-vapor-barrier
href="http://www.greenbuildingadvisor.com/blogs/dept/musings/dense-packed-cellulose-and-wrong-side-vapor-barrier">http://www.greenbuildingadvisor.com/blogs/dept/musings/dense-packed-cellulose-and-wrong-side-vapor-barrier</A></DIV></DIV>
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style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>Here
is an interesting blog about thick cavity framed walls filled with dense pack
cellulose and covered on exterior with ice shield vapor barrier. This is
in a cold climate. The video link in the article shows the owner making
the readings that showed low moisture content on interior side of exterior
sheathing. My hunch is that he did such a good job of making the assembly
air tight, which the ice shield is part of that not much air is reaching the
exterior sheathing, therefore less moisture. However, I suspect this
assembly is more vulnerable to less perfect installations. </DIV></DIV>
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style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>Another
issue they discuss is the hydroscopic quality of cellulose to absorb moisture
and distribute evenly. I am curious about the vapor permeable foams that
are air tight (eps, open cell foam). Do they have the ability to
redistribute vapor? Does vapor that condenses in a vapor permeable foam
able to evaporate again to continue upward migration out of the system. I
would expect that the upward buoyancy of vapor makes the bigger threat at top if
there is a vapor barrier. I am an advocate for air tight, vapor permeable
foams with ventilation above to allow continued migration of vapor out of the
system. </DIV></DIV>
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style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>Hoping
for your thoughts. </DIV></DIV>
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style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>Eli
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