Structural Insulated Panels- are an ideal product use for the Cai (tm) House construction.
These products are comprised of two different type of insulated cores sandwiched typically by 7/16" OSB (Oriented Strand Board). One core is EPS and the other is Urethane. These structural systems can be utilized on the sidewalls, floors and roofs and can provide fastenning surfaces for both interior finish and siding.
EPS manufacturer- www.rtight.com
EPS and Urehane- www.winterpanel.com