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Old 01-09-2012, 10:58 PM   #1
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Cellulose over Icynene??


I just added a 28x28 2-car garage to my 2-year old 1800 sf house. I am going to blow cellulose into the attic, and I am kicking around blowing some cellulose on top of my Icynene (R-30) in the attic of the house as well while I have the blower on site. (I can get the blower for free if I buy a few extra bags of cellulose.) I am in southern Illinois and they IECC guidelines recommend R-38 for my area.

1) Is this okay (i.e. safe, not going to cause a chemical reaction, etc.)?

2) Is this advisable? Is it worth the extra time and expense, as minimal as they may be, to add extra R-value with the blown-in cellulose? Will I compromise the open cell foam if I cover it with cellulose?

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Old 01-10-2012, 09:45 AM   #2
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Cellulose over Icynene??


That should be fine.

Blow it to and R-50 and make sure they use a borate only cellulose.

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Old 01-20-2012, 02:30 PM   #3
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Cellulose over Icynene??


Thanks!

Does anyone have specific experience covering open-cell foam with cellulose?
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Old 01-20-2012, 11:22 PM   #4
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Cellulose over Icynene??


Yes.

What type of information were you looking for?

There is not reactivity issue and even less potential for it if you use the borate only stuff.
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