Installing a patio sliding door needs to be followed in proper steps. First, you need to level and square the door frames and then where the shims have been inserted, secure the doors using screws. In the manufacturer’s guidelines, you will get a detailed diagram of the entire process. In reality, most the shims have predrilled holes so that you can insert the screws. Once the frames are fixed, it’s time to install the door panels. Further, you can take help from the guidelines. Before setting the tightening stops, you will need to install the active panels on the door frames. Once both the panels are correctly installed, you can move ahead to tighten the stops and install other hardware.