form of moisture barrier. This can be in the form of polyurethane sheeting. Most hardware stores will be able to direct you to the right product for the job. This is especially true when working in a basement or any other room that is below-grade. Step 3. Measure your room and divide by the width of a flooring plank. This will determine the number of the planks needed to cover the floor. If your measurements leave you with space of more than 2.5inches on you long wall (63mm) you should start with a partial board (cut the board to size) in the first row to ensure the stability of the floor. Step 4 . Leave a 3/8inch (10mm) expansion gap between the flooring and each wall, or other obstacles such as a door frame or cabinetry, using spacers (scrap wood or waste product works well). Working left to right in the room: "brick" or stagger your planks to reduce the visual appearance of the seams. The tiles along the edge should be the same width along all the walls. This is where your "pre-placement" of your planks is going to pay-off. Place the first plank in the left - hand corner of the room (leaving your spacing to the wall) with both tongue sides facing the wall . Complete the first row by angling the planks together one at a time. Try to install the tiles so that they form a single line when you click them together. See Figures