How are the liners rolled out on the jobsite?

The liner roll will be marked (typically on the roll itself and on the exterior wrapper) with the length, width and directional arrows. Of course, step one is to unroll in the direction indicated by the first number and arrow. The second number shown is the unfolding direction. In theory, a liner can then be placed on any of the four “corners” outside of the excavation, and unrolled in the appropriate direction. Which corner to start on is influenced by wind direction, obstructions present, available room to unroll the liner, etc.