Set room temperature to a minimum of 68-degrees Fahrenheit and acclimate the flooring to the room in which it will be installed for a minimum of 24 hours before installation.
Measure the width of each opposing wall and divide by two to find the center. Mark this as the center point on the wall. Pull a chalk line between center points on facing walls and snap a chalk line on the floor. This creates crossed chalk lines at the center of the room or hallway. Use a carpenter’s square to confirm the lines are perpendicular or 90-degrees to each other. If the lines are not perpendicular adjust one and re-snap the line.
Remove the dry fit tiles and spread a dollop of adhesive on the floor using the 1/16" notched trowel. Spread adhesive only where the next tile will be placed so that it does not dry before the next tiles is ready to be laid. Continue outward until only tiles abutting the walls remain.
For partial tiles, measure from tiles already in place to the wall. Transfer those marks onto a tile and cut it to fit using a carpenter's square and utility knife to make a clean cut (image 1). Spread adhesive and place the cut edge against the wall (image 2).
Before the adhesive dries, roll over the tiles with a heavy roller rentable at most home centers or tool rental businesses.