Canadian Built BCC - Cored or Insulated Solid GRP Hull

I have been told by the owner of a Canadian built BCC (the Channel
Cutter Company) the hull from keel to deck is a solid GRP layup with
3/4" polyurethane insulation glassed to the hull from the waterline
to the deck flange. Plywood inserts (backing plates)were substituted
for the foam where the chainplates, etc. are attached to the hull.
Can anyone verify this construction schedule?