I just pulled up the old floors in my condo and found two holes along the wall near a corner. They go under the wall and come out about 1 1/2 inches past the baseboards and are about 3 1/2 inches wide. There is about 8 inches between the holes. The holes go through the concrete floor and into the wall below so there is no way to fill them.

I am floating a 5 " egineered floor. What problems would it cause me if I do nothing with the holes? Does anybody have any ideas for what I can do to cover them? Thanks. tony