Poly-Iso Insulating Foam R-value is Changing...

AC_Hacker · 09-01-14, 11:46 AM

Various foam R-values get discussed a lot on this forum, so I thought it would be of interest to know that new testing procedures are being applied.

R-value is being reduced from R-6/inch to R-5.7/inch

SEE_ANNOUNCEMENT

There could be other changes to other materials, too.

-AC

Mikesolar · 09-01-14, 06:37 PM

The same holds true for 2lb urethane foam and isonine foam. Long term tests show a settling of R values for most foams.

09-01-14, 11:46 AM	#1
AC_Hacker Supreme EcoRenovator Join Date: Mar 2009 Location: Portland, OR Posts: 4,004 Thanks: 303 Thanked 723 Times in 534 Posts	Poly-Iso Insulating Foam R-value is Changing... Various foam R-values get discussed a lot on this forum, so I thought it would be of interest to know that new testing procedures are being applied. R-value is being reduced from R-6/inch to R-5.7/inch SEE_ANNOUNCEMENT There could be other changes to other materials, too. -AC __________________ I'm not an HVAC technician. In fact, I'm barely even a hacker...

09-01-14, 06:37 PM	#2
Mikesolar Master EcoRenovator Join Date: Aug 2012 Location: Toronto Posts: 958 Thanks: 40 Thanked 158 Times in 150 Posts	The same holds true for 2lb urethane foam and isonine foam. Long term tests show a settling of R values for most foams.