The PO fitted panels
of 1" polystyrene foam all over the interior
of Boracay. Unfortunately that's where he stopped.
I was a bit worried about the fire hazard from polystyrene but it's no worse than polyurethane
and it essentially has the the same chemical composition as fibreglass resin.
The stuff works well and is cheap
. Can be glued in place with contact cement.
I cut back mine along the stringers, chine bars and frames so I could see what's going on.
I've fitted out the interior of Boracay by bolting pine battens to the stringers and screwing plywood
on top. 7mm headliner
and paneling, 12mm if there's any load.
It's a slow, labour intensive way to fit out a boat, but I can't think of a better way.