A 1986 17' Bigfoot
is molded fiberglass with an upper and lower half. When the owner speaks of delamination, he isn't talking about filon sheet fiberglass in a stickbuilt trailer that can split into many layers. The Bigfoot
walls, ceiling and floor are made of a sandwich of thin exterior fiberglass, stryfoam insulation and inner wall plywood that in glued together. If the glue fails in the wall, the exterior fiberglass is not strong enough to support the weight
of the roof and the wall will sag. By adding new glue and clamping with pressure, the original strength is restored and no more sag.