Our floor is the sub floor as well. You can treat as sub floor and lay new floor over. Pull up flooring, install new sub floor and relay old flooring tighter to reduce gaps but be prepared to patch with additional flooring. Leave as is and patch cracks with wood filler, but this will need to be redone as it gets pushed back out of the junctions.
hotwawa t1_ixxe6vy wrote
Reply to Floorboards restoration large gaps by jayeshsondhi
Our floor is the sub floor as well. You can treat as sub floor and lay new floor over. Pull up flooring, install new sub floor and relay old flooring tighter to reduce gaps but be prepared to patch with additional flooring. Leave as is and patch cracks with wood filler, but this will need to be redone as it gets pushed back out of the junctions.