Strawbale Code

11/20/2017 NOTE: The Michigan Residential Code (MRC) adopted – word for word –  the International Residential Code (IRC) for Strawbale Construction.  Currently it can be found here. You can also google “IRC strawbale code” and find it at other links.


10/30/2013  Derek Roff ( writes in SB-r-us listserve:

The new version of the code is more than a year away from “going live”, even for the locations that are early adopters of the IRC changes. But I suspect that in areas that don’t have a strawbale code, or where there is resistance to SB due to code officials being unfamiliar with SB’s requirements, perhaps this new SB Appendix could be helpful sooner. If anyone on this list uses the new appendix in discussions with code officials, please let us know about your results and experiences.

The 2015 version of the International Residential Code, IRC, will include a straw bale building appendix. Final approval was on October 3d, 2013, and this will come into effect when the 2015 code is published/ comes into effect.

The 14 page appendix can be downloaded as a pdf file here:

It will be worth it to print these pages out and study them line by line.

You will have to check with your local inspection department to see if the IRC is in force in your location. If not, and if they don’t have their own SB codes, you can push for them to just adopt this one. 🙂

Thanks to all who worked hard to achieve this, and thanks to Andrew Morison<> for posting the news and the pdf file.

A later iteration of the appendix will include illustrations, according to the announcement.


Chris Green.