You have to pre prep the floor with a thin glaze of adhesive prepper before you lay these down.  Also order 2 or 3 extra boxes, because they just ship in the original box and after being thrown in the mail a lot of the tiles had broken corners. I was disappointed that they did not mail the boxes within a box to preserve the tiles getting damaged. the color and pattern is nice but over all not to keen on quality. I am using these in my "she" shed.