Is it Lexan or Polycarbonate Panel? Is like saying “Is it Kleenex or Facial Tissue?” Lexan is “the well known brand”, Polycarbonate is the generic term. The Architect’s personal residence is a great place to try it. We live in an 1970’s California Contemporary originally designed by Irving Palmquist, AIA of Home Planners Inc. Unfortunately, this California Contemporary home was built in NORTHERN Illinois. Distinctive feature of this style of house is NO overhangs/eave