More in Floors
Start by marking a reference line parallel to the longest exterior wall in the room. Use the exterior wall because it's usually the longest and straightest run. If the longest exterior wall is less than half the length of an interior wall in the room use the longer interior wall. Measure the same distance away from the wall at several spots. Three feet should be enough. Mark a line with a pencil or chalk line.
Nail the 1x4s down as a batten boards all the way down the line. These boards provide a guide to lay the first board in and a solid surface to nail to.
Lay the first floor board in and secure it with an 18-gauge pin nailer driving the nail right into the shoulder of the tongue (image 1). The nail needs to go in at an angle so it isn't in the way of the next board (image 2). If the flooring abuts a different kind of wooden or tile flooring leave a one-inch gap between the bamboo flooring and the other flooring. Use a transition strip between the two flooring types to cover the gap.
Cut a short piece of flooring (1') to start another row to stagger the seams. Double check that the boards are running straight, lay in the next course, line it up with the seam and push it in and check to make sure the seams are straight.