There is nothing more aggravating than maintaining the gauge width throughout the seaming process. I have witnessed seams move half an inch within a few hours due to temperature change. When the turf and the nails are hot, placing one temporary nail is not enough to prevent the turf from moving. I recommend seaming early in the morning when the temperatures are low and use the JW Triangle Turf Nail Method.
When temperatures rise while installing seams, there may be a chance that you will need to constantly adjust the seam line to the correct gauge width due to thermal movement. Your seam is not finished moving until the adhesive is cured, so yes, that means you have to check it continually until it is.
METHOD: When the seam line is at the correct gauge width, place 3 turf nails in a triangle pattern approximately 3 inches apart from each other every two feet down the seam line. Do this approximately 18 inches away from the seam. Most installers use one turf nail on each side, but this may not be enough to prevent the seam line from moving during thermal expansion and contraction.
ALWAYS CHECK AND DOUBLE CHECK THE GAUGE WIDTH DURING THE ENTIRE CURING PROCESS!!