In wall insulation panels can be used in many commercial situations and not simply between wall studs. In a recent example, a thermal break was needed between an existing concrete wall and a new one when the use of a building changed. Builders used 1” and 2” thick panels of 0.9lb density EPS panels from Universal Foam Products to insulate the space and to create the required thermal break. Take a look at the fascinating construction stages here. https://www.universalconstructionfoam.com/projects/eps-were-used-to-insulate-and-create-a-continuous-thermal-break-between-two-concrete-walls/
