There are many tutorials on the internet about how to install a sliding door. The most important part of the installation is making sure that the door is level and that it slides smoothly. You may also need to install a new track if your old one is rusty or damaged.

Step 1: Measure the opening in which you will be installing the sliding door. Double-check your measurements and then cut the track to size. If you are installing a two-panel door, make sure to cut both tracks to the same size.Step 2: Apply a thin layer of construction adhesive to the back of the track. Do not put glue on the floor!Step 3: Place the track in position and attach it to the wall with screws or nails. Make sure it is level before attaching it. Step 4: Install door hardware according to manufacturer's instructions. Most hardware will come with detailed installation instructions. Step 5: Slide panels into place and test door for smooth.