You spent time and money building your patio, so now learn how to access it with ease. Installing a patio door is not much more difficult than installing a standard entry door.
A sliding or swinging patio door installs using many of the same steps as for a standard entry door. However, because it is so large, requirements are more precise. The frame must be straight and square all along its length; it is particularly important that the sill be straight and level. Some patio doors are sold with the frame knocked down, so you will need to assemble it. It may be easier to purchase a door with the frame already assembled.
The steps that follow show a sliding patio door. If you are replacing a patio door that operates smoothly, you may not need to alter the rough opening. However, if the old door was difficult to operate, check the rough opening carefully.
After the rough opening is prepared, you'll need about 4 hours to install the door. Make sure you're comfortable measuring, sawing, fastening, and leveling.