Mid-century modern homes were designed for beauty and innovation—not energy efficiency. With expansive walls of glass, minimal insulation, flat roofs, and early radiant heating systems, many 1945–1970 homes can feel drafty in winter and overheated in summer. The good news? With thoughtful upgrades—insulation, modern glazing, high-efficiency heat pumps, and solar—today’s buyers can preserve the architectural integrity of these iconic homes while dramatically improving comfort, efficiency, and long-term value. Understanding what’s original, what’s been upgraded, and what still needs attention is key to buying a mid-century home wisely.
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