Replies

1. 
   D Dorsett|Oct 22, 2016 06:15pm|#1

   Nope! Doesn't make code min for zone 3 per IRC 2015:

   http://codes.iccsafe.org/app/book/content/2015-I-Codes/2015%20IRC%20HTML/Chapter%2011.html

   It would make it if it were 2x6 though. Code min is 2x6/R20 or 2x4 / R13 + R5 continuous insulation.

2. 
   Mike Beckham|Oct 22, 2016 06:25pm|#2

   Thanks, Dana!

3. 
   John Clark|Oct 22, 2016 08:29pm|#3

   Just an fyi it depends on your state. My state (Georgia) follows 2012.

4. 
   D Dorsett|Oct 22, 2016 09:02pm|#4

   Unless otherwise specified in the question, I always default to the most recent version, which is currently IRC 2015.

   If you're looking for IRC rev (if any) that applies to your state see:

   https://www.energycodes.gov/sites/default/files/images/residentialStatus_0.png

   https://www.iccsafe.org/wp-content/uploads/State-Local-Code-Charts.pdf

5. 
   John Clark|Oct 30, 2016 10:13am|#5

   Wish I knew why Georgia won't move to 2012 IECC. I guess the GAHB is balking at the min r-value for walls which requires them to drop their customary wall mock up (16" oci 2x4 /OSB/Housewrap) for the more expensive 16"/24" oci 2x6 or 2x4 w/exterior insulation.

   Frustrating!