Hello, It is not a new idea to laminate thin paper with thicker ply card stock. Some publishers now include cardboard for this purpose and some anticiipate that laminating will be done when printing on very thin paper. I have been using 1/4" medium density fiberboard (MDF) as a substructure to support large horizontal laminated surfaces such as ground areas and courtyards. I find it superior to paper girders or zig-zag stiffeners. It is smooth, stable and very easily cut. More importantly, it stands vertically on its own when cut into thin strips. I have seen models where only tabs are used to fasten elevated ground areas to buildings. A simple grid of thin MDG beneath provides not only support but allows the ground area to meet all walls at exactly to same elevation. If you have a table saw with a thin blade, making thin strips is a snap and will simplify your architectural modelling. J.L.