Remove the grout around all sides of each tile along the perimeter. Use a hand-held manual grout saw, or an electric rotary tool equipped with a carbide grout removal bit to remove the grout down to the subfloor or cement backer board.
Score 1/4-inch deep diagonal lines from corner to corner across the face of one tile with a carbide scoring tool. This creates an X-shape across the tile, weakening it.
Place a point punch in the center of the tile where the diagonal lines intersect. Strike the point punch with a hammer to break the tile.
Break up the remainder of the tile by placing a cold chisel along the scored line and striking it with a hammer. Remove the pieces of broken tile from the area.
Position the chisel against the edge of the adjacent tile where the bottom of the tile adheres to the floor or backer board. Strike the chisel with a hammer to break the tile free from the mortar. Repeat this step to remove each tile from the perimeter.
Remove the remnants of mortar from the subfloor or cement backer board with a bricklayer’s chisel. Hold the chisel at a 20- to 30-degree angle to the floor or wall. Strike the chisel with the hammer to remove as much of the old mortar as possible.