THANKYOU, THAT'S WHAT WE FIGURED WE WOULD HAVE TO DO. :) THEN DO WE JUST LEAVE THAT AREA, WHICH IS ABOUT 10FEET WIDE BY 10 FEET LONG, AND 4 FEET HIGH, EMPTY?? OR SHOULD WE FILL IT IN?? I'M JUST WORRIED ABOUT MOLD OR RADON IN THE BASEMENT. WE HAVE 3 SMALL CHILDREN TO WORRY ABOUT. THANKS FOR...