Write down the length and width of the tile.  You can find a construction calculator easily online. Ask how long shipment will take so that you can schedule a day to install it. In 2014, estimates for slate flooring for a 100 square foot (30.5 m) area were between $250 and $400.  Without labor, other materials and equipment rentals can result in a cost of $400 to $850 per 100 square foot room.  You may want to order five percent more tile in case of breakage. 6-cm) spacers so that you can keep your slate tile evenly spaced and grouted. If you want very fine grout line, you can place your tiles side by side. You will need a trowel with quarter-inch (0.6-cm) notches. Reorder tile before you start your project, so that you can ensure you have enough tile to complete the flooring. Some tiles are thicker than others and surrounding tiles will need to be built up with adhesive to ensure a flat surface.

Summary:
Research and find the slate tile you want to use. Measure the length and width of each room you want to tile. Use a construction calculator to find out how much tile you will need. Order the tile. Purchase a large bag of quarter-inch (0. Buy your grouting equipment and mortar. Remove all the tiles and check for surface damage before you get started. Sort your tile according to color variation and thickness.