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?
Best Answer
Two "minor" points... if the plywood is going to genuinely offer support, it probably needs to be at least 1/2". Have you thought about whether that's going to create other problems with clearance, such as at transitions/intersections/door bottoms? Also, assuming that the flooring runs perpendicular to the existing framing (joists etc), if we're really talking about small slivers, such as you describe I'm not at all sure that you need to do anything. Is there no existing subfloor, the flooring is just attached to the joists?
Can you post pics of the typical damage?