The term ¡°waterlogged¡± implies that water is saturating something in the roof panel. IIRC the roof panels are made of styrofoam sandwiched between 3 mm sheets of plywood with a thin fiberglass skrim on the outside. A small amount of water might get trapped in the plywood, but that would quickly be apparent because it¡¯s so thin. Other than that I don¡¯t see how any significant amount of water could accumulate in the roof panels.
