03-20-15, 11:06 AM | #11 |
Journeyman EcoRenovator
Join Date: Jul 2014
Location: Austin, TX
Posts: 314
Thanks: 39
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I'm mostly looking at iso because it had a slightly higher r value than the xps. The xps I've seen is tongue and groove but the iso isn't. Regardless I'll tape my joints.
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03-20-15, 01:44 PM | #12 |
Lurking Renovator
Join Date: Jun 2013
Location: Portland, OR
Posts: 21
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XPS is actually blown with HFCs that don't harm the ozone, but the issue is their global warming impact is about 1000x that of CO2. I looked at using XPS for my basement floor and the global warming impact of the blowing agent alone was similar to driving a car for a year. I instituted a personal ban on using XPS unless it's used/reclaimed.
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