Hi, We would like to put the carpet tiles over small tiles that have a wide grouting between them that dips a little inbetween. So it is not an even surface. Would this cause issues with installation as well as the final product?

Our Ribbed Carpet Tiles can be installed over tile with wide grout lines. As long as the grout lines and the seam of the carpet do not occur in the same area, you will be fine. An underlay can be used over your tile flooring making your installation of your carpet tiles worry free.