The builder of our 45 yo house used what appears to be old porch board, or old siding for the subflooring. We have chosen tile and hardwood flooring to install over this. Does the subflooring need to be replaced if we use hardibacker under the tile and the liner under the hardwood flooring?
I don't want to install the new flooring, have to break it all up and redo it, if the subflooring isn't adequate.
Any suggesstions are appreciated!!