We had a leak with or at the refrigerator vent on the side of the TT. Water ran down the wall, under the refrig, and under the flooring. My first solution was to find and repair the water leak. Next was to pull up and discard the old flooring {tile and carpet} and put in a new laminate floor, PERGO Max Hardwood, over the original material. That solved the issue, no more leak, no more spongy floor. That was 10 years ago and that TT is still in good condition today.