Re: Hulls on older boats Question?
wood free construction goes back to at least 1972ish. maybe earlier even.
at least for the mfg. of my boat anyways.
the boat in my sig. is billed as wood free. while not totally true. it's mostly true. certainly no stringers or wood sole. minimal wood in the transom. just around where the drive is at. funliners were wood stringer free too best i know. they were the predecessor of my boat built back in the 60's..
as for checking for rot. ya gotta drill some holes and see if ya get rotted wood out or fresh wood. low in the transom, soles at the back are usual places for rot. if ya can find any wood visible (which isn't easy). probe it with a ice pick.
or can you still get rotted out floors today?
don't know if ya can get new rotted out soles or not, but ya can get used ones...

they can be replaced with not rotted soles with much effort..