Thanks cdbe, I'll do that. There are some metal strips there to secure against some kind of noggin.
Just to be sure the 4x2 has the long side horizontal?
I need to add a board to cover this hole in the 1st floor floor. The rest of the floor is 18mm tongue and groove, and there are joist on the edge of the hole. I need to fit a board to cover the hole and need to install battens? (not sure the name) to the walls to screw the new board to.
I'd...