We have lifted our original floorboards in our property, we now plan on insulating between the joists and relaying the original boards.
Unfortunately, the floorboards were old and brittle and consequentially many boards have lost small slivers of wood from either the tongue or the groove on the underside of the board.
My idea to salvage as many of the original boards as possible is to lay a thin layer of plywood over the original joists to better support the now weakened original boards. Areas where the tongue or groove of the board are damaged that could potentially split benefit from the additional support of the plywood board.
Can anyone comment on the potential merits or pitfalls of this idea?