![ashrae 90.1 2009 ashrae 90.1 2009](https://thermaldesign.com/images/site/WallRvaluesChart.jpg)
Once that decision is made, the entire building envelope, including mechanicals and lighting, must follow the same path. The building designer will have to make the decision to pursue either IECC 2015 or ASHRAE 90.1-2013. The choices are the same for the rest of the envelope. I detail the key differences between the systems below. Both options fulfill the metal building insulation requirements it’s just a matter of preference. If you haven’t used Liner Systems (Ls) or Filled Cavity/Long Tab Banded Systems (FC) in the past, you will need to start using them. This is a huge jump, and many metal building contractors will feel the pressure.
Ashrae 90.1 2009 code#
Many states currently at the IECC 2009 code are bypassing IECC 2012 altogether (or have already done so) and adopting IECC 2015. If your state’s current code is based on the older IECC 2009 and ASHRAE 90.1-2007 Standard, you’ll see more significant envelope changes. Also, note that I’m basing the upcoming changes on comparisons of the current IECC 2012 code and the ASHRAE 90.1-2010 Standard. I briefly covered this overview in a prior blog post, but it can’t hurt to go over it again, especially when it comes to complex code information.
![ashrae 90.1 2009 ashrae 90.1 2009](https://www.esmagazine.com/ext/resources/2020/08/23/fig1-900x550-(2).jpg)
Vermont (state-specific code modeled after IECC 2015)Īlso, the new code cycle will be effective in Georgia January 1, 2018. Michigan (adopting IECC 2015/ASHRAE 2013 in April 2017)