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Old 02-05-2011, 10:10 PM   #1
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cellulose blow-in, i'm concerned about moisture


i have an old house (c.1910) with no insulation.
i'm under contract to have cellulose blown in this monday. there was a big incentive through CET so i went with it.

i'm concerned about all the ice dam issues that are widespread here in the northeast this year.

i know of at least three or four houses with major leaks going on because of ice dams. i just discovered a significant leak in my bathroom, which has a shed roof over it. this area will not be insulated, but i'm concerned there are likely other areas that are leaking into my wall cavities.

if cellulose is blown into a wet wall, or the wall becomes wet after the fact, isn't the insulation essentially rendered garbage?

would i be well advised to postpone this job, or cancel the contract (i'd lose my deposit, probably)?

my only other option, though, is basically gut the exterior and spray foam. my interior is mostly renovated horse hair plaster/lathe and i don't want to touch it.

should i just proceed with the job?

thanks for any advice.

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Old 02-06-2011, 01:21 AM   #2
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cellulose blow-in, i'm concerned about moisture


If doing the attic, edge blow the perimeter; http://www.homeenergy.org/archive/he...95/950309.html

Air seal the problem areas first; http://www.homeenergy.org/archive/he...98/980508.html

Cellulose wet blow-in needs to dry to 25% moisture before covering; http://bct.nrc.umass.edu/index.php/p...-smart-choice/

I would go ahead if no ice dams are above the walls to be insulated. Air seal the attic before insulating it; http://www.google.com/url?sa=t&sourc...O842EQ&cad=rja

It will stop the “stack effect”; http://www.wag-aic.org/1999/WAG_99_baker.pdf

More info; http://www.mnshi.umn.edu/kb/scale/in...densepack.html

Procedure; http://www.ecicellulose.com/How-It-W...Your-Home.html

Gary

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