Winnebago developed and patended the Thermo-Panel sidewall construction technique in the late sixties. The panel is an aluminum frame with block insulation between the frame members and fiberglas or aluminum sheets bonded to the frame and insulation. Makes a strong light weight sidewall. The roof uses small aluminum trusses.
2002 Monaco Windsor 40', 350HP ISC, Banks, Van X-Braces, TRW Steering, Source CCV, Bilsteins
2000 Jeep Grand Cherokee, 2" Lift Package