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Foam vs. Cellulose Insulation?

Posted by Angela on November 23rd, 2002 05:17 PM

14 of 23 people found this post helpful

I want to insulate exterior walls on an older home. The cellulose guy tells me the following:
1. R-factor is about the same as the foam
2. pressure blown in to create a "tight" pack (little air in wall cavity, smothers electrical fire)
3. future wiring can be easily done with metal fish line
4. treated with fire retardant, Borax for insects and poses no health risks
5. claims foam releases toxic gases is burned

The foam guy tells me the following (foam product is not icynene, he calls it a "tri-polymer" (very descriptive), but is very similar to it):
1. R-factor might be same as cellulose on calm day but better on windy day
2. bonds to the walls and "moves" with it to keep a tight seal
3. future wiring can be easily done with metal fish line
4. is fire retardant and poses no health risks
5. claims cellulose dust can come into house around supply/return duct openings
6. cellulose cannot be blown in tight enough not to leave voids in the walls

I need unbiased opinions and experience on the two products (I am tired of salesmen). I am about to have a baby so health issues are foremost, R-factor and price are secondary and tertiary. Any comments would be appreciated. Thanks!

P.S. Is it the cost of the foam product itself that doubles its price versus the cellulose?

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