Check out the new HidFast gun. This gun is the first answer to the question of how to install PVC decking without using a bottom side install system. This gun allows you to work from topside. This gun is basically a floor nailer. You hit the bumper with a mallet and the gun drives a spike through the board at an angle and leaves a nub for the next board to get driven into. Watch the video of how fast you can install decking. AZEK stands behind this gun and endorses it for use with their decking. HidFast says you can use it on many other types of decking.
