03 Jul '11, 12pm

Green Building Q&A: Can insulation "work against you" in a Cooling Climate?

I noticed an unusual comment in the comment section of this page: http://www.designbymany.com/challenge/passive-house-for-new-orleans The comment is about 1/3 down the page (posted May 16, 2011 by Katrin Klingenberg) In a cooling climate, the delta T is much smaller than in a heating climate, and due to the internal heat gains insulation actually starts to work against you at a certain point. I think anything up to R30ish is doable/defendable for all components, including roof and suspended floor. Beyond that it will only add to your cooling problem. I understand how insulation can "work against you" in a building without air conditioning.... Or when the conditions outside are "better" than conditions inside. The problem is that most Southerners DO Air Condition their buildings in order to be comfortable.... and for many of the hours during the Cooling Season the condition...

Full article: http://www.greenbuildingadvisor.com/community/forum/energ...

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