Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Define a single layer with the properties of the bottom two layers combined and enter it as a Material. Reference this as the Slab Material Name in the Site:GroundDomain:Slab, where you would also select no insulation. Put the remaining materials, polystyrene and up, in a Construction object for the floor assembly. In your BuildingSurface:Detailed object for the floor of the zone, select the floor assembly object for the Construction Name and select your OCSM object as the Outside Boundary Condition Object. I believe that should do what you want.
