The fiberglass sides are bonded to thin plywood and insulation and then inner wall sheet creating a strong, solid laminate. The end caps are just a thin molded fiberglass shell. There is more behind them but they are not bonded to the inner structure like the sides.
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Nick
1995 Coachmen Santara 360MB 36' w/slide.
Ford F53/460 chassis, 2020 Chev Equinox "toad"
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