Kauri is indeed a wonderful timber, as it ages it goes very hard. You want to try putting a drill thru 50+ year old Kauri demolition timber, burns the drill & just about impossible to nail.
There are several methods of construction, is it Carvel planked & caulked usually on steam bent ribs, or maybe several glued diagonals? Kauri is not immune to rot
from fresh water
, so you need to look for places where water
may have been trapped eg alongside stringers. Biggest problem for many "modern" timber boats has been rot
decks - the cost of repairs
has at times exceeded the value of the boat