On Jul 25, 10:47*am, CS wrote:
My pine floor is 22mm T&G attached to steel beams with Wurth Zebra
Pias screws. *Pilot hole in board and self tap into 6mm steel with
ease - up to 10mm with care!! *There is a foam/foil insulation layer
under the pine. Getting boards T&G would probably be expensive - I
would be tempted just to put in some biscuit joints at say 300mm
intervals.

http://www.luxe-motor-kei.co.uk/inte...e/image37.html

Brilliant - thatnks for that. Its good to have some idea that this
should work.
Do you think it's necessary to screw the floor down, though? I don't
really want to have marks in the floor... when I was a land lubber I
put down clip together laminate flooring that was just laid over the
floor, and was designed to move as it expanded(/warped?!) Is this wise
with proper floorboards on a boat?

thanks

Jim