Which construction method uses panels with foam insulation sandwiched between plywood sheets that are assembled on-site and require no framing members?

• A. Modular Home
• B. Precast concrete
• C. Panelized Home
• D. Open Web Joist

Answer: (C)

Panelized construction uses wall panels that combine foam insulation sandwiched between outer sheets (like plywood or OSB). These panels are manufactured off-site and then erected on-site, snapping together to form walls without needing separate framing members added at the job site. The result is continuous insulation and a rapid assembly process, with the panel itself providing the structural envelope. This stands in contrast to modular homes, which come as larger factory-built modules that still include framing within each module; precast concrete relies on concrete panels rather than foam-core plywood assemblies; and open web joists describe a floor/roof framing method rather than an insulated wall panel system.