A plurality of decorative pieces, such as chips, stones, or tiles, are temporarily attached to a rigid film by a releasable adhesive. First and second tile sections are fixed to a floor or subfloor surface to create a gap between the first and second tile sections. A tool is provided having a plurality of teeth which are configured so that they can be inserted in the gap between the first and second tile sections. The tool may also include two shoulder or wing portions which engage and overlap portions of the first and second tile sections and which thereby prevent the plurality of teeth from penetrating farther than a certain distance into the gap. The gap may be formed by gluing the first tile section and the second tile section to the floor or subfloor surface with a first glue. The method may further include gluing the plurality of decorative pieces, with a second glue, inside the gap, and then peeling off the rigid film from the plurality of decorative pieces.