Measure from the top of the track at one end of the door down to the threshold on the ground with a tape measure.
Measure for a sliding screen door.
If your sliding screen doors are missing determine width by measuring from inside of side jamb to center of stile on opposite side just short of where the stationary glass begins.
Locate the header at the top of the track on the inside of the patio door.
How to measure for a sliding screen door replacement step 1.
Unlock and slide open the patio door.
Also always use a heavy duty measuring tape with a blade width of minimum 1 inch.
If your old patio screen door is available simply measure the length and width outside edge to edge and give us those measurements.
Furthermore refer to the instructions below for height measuring while making sure to use the right tool for the job.
If your sliding screen doors are missing determine width by measuring from inside of side jamb to the opposite side of the center style just short of where the stationary glass begins.