You ll need to know the ro measurement when you purchase or order your new door.
How to measure a sliding glass door handle.
Stud to stud refers to the 2 by 4 framing all around your slider door.
Measure from stud to stud using a tape measure.
Measure from the frame on each not from the glass.
Do not measure up into the channel.
Also measure the distance from the outer face of the moving door to the outer face of the fixed door.
Measure the width of the jamb without the trim.
On the height of sliders measure from the raised track on the bottom to the bottom of the channel on the top.
Next establish the depth of the door opening.
Measuring stud to stud is known as the rough opening or ro measurement.
Your door actually attaches to this framing.
The smallest of the three measurements is the correct measurement for the door height.