YOU CAN TAKE OUT THE BOARD AND DRILL A HOLE IN THE CONCRETE WITH A CONCRETE BIT AND PUT IN A LAG STUD OR BOLT AND BOLT IT RIGHR TO THE FLOOR. OR USE A THINNER BOARD ORMAKE A SMALL STEP AROUND THE TOILET TO STEP UP ON. I HAVE SEEN ALL THOSE SUGGESTIONS IN THE PAST. THEY HAVE ALL KINDS OF DIFFERENT BOWL RINGS THESE DAYS AT MOST HARDWARE STORES TO ACOMIDATE ALL INSTALLATIONS.CHECK IT OUT