The thermal insulation of a TrailManor is superior to that of a “stick” construction trailer because the foam insulation is not broken up by framing members. The roof, sidewalls and bed bottoms have almost continuous 1″ foam insulation (equal to 2″ of fiberglass), and the floor has a full 3″ foam core (equal to 6″ of fiberglass). The trailer is so well insulated that the 16,000 BTU furnace will heat the trailer as much as 70 degrees above the outside temperature. This excellent insulation also makes a TrailManor much easier to cool in the open sun.