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Ryland · 01-08-13, 06:10 PM

I can't find anything for 8" cavities, but compressing R15 insulation by 1/2" it's Rvalue drops by R2 for each and every 1/2 that you compress it.

01-08-13, 06:10 PM	#14
Ryland Master EcoRenovator Join Date: Mar 2009 Location: Western Wisconsin. Posts: 913 Thanks: 127 Thanked 82 Times in 71 Posts	I can't find anything for 8" cavities, but compressing R15 insulation by 1/2" it's Rvalue drops by R2 for each and every 1/2 that you compress it.