This article will explain how to measure your door height. This is important to see if you need any extension pieces.
To measure your door height use a tape measure. Open your sliding doors and Place the tip of the tape measure at the very bottom of the sliding door channel (the part your door slides on not the door itself). Then measure from the bottom to the very top channel. If the height of your door is greater than 211cm then you will need extension pieces. If your height is less than 199cm our doors will not fit.
For more information on extension pieces click here.