Are the fiberglass walls actually laminated over plywood or foam cores?
As I understood back in 2007, the make-up of PC walls are as follows.
1) Outside is a thick gel-coat fiberglass sheet, maybe 1/4" thick.
2) Core is aluminum studs, alloy framing for large openings, and block foam insulation
3) Inside is prefinished tempered hardboard
The sandwich is vacu-bonded together, an interesting process where the components are glued and assembled, then somehow quickly placed in a huge bag and the air is sucked out. It is a process not very different to linen bags and a vacuum cleaner at home, used for compact storage of huge bulky fluffy items.
The materials for the roof is different.
1) Outside is a thin layer of fiberglass sheathing
2) Supporting it is one or more layers of thin Luan plywood
3) Core is curved aluminum rafters, framed openings, and block foam insulation
4) Inside has a fabric, later a foam-backed vinyl. I don't know the supporting material.
Please correct any inaccuracies.
