It reduces the risk of measuring errors.
How to measure sliding screen door height.
Measure at top of leg at sill to bottom of led at header.
For the height measure from the top of the bottom track into the top u channel see the diagrams below.
Write down the measurement.
To measure a screen door hold the measuring tape inside the door frame about 6 inches from the top and pull it across to the opposite side.
This is a vertical cross sectional view of a typical patio door main frame head and sill with patio sliding screen door also installed add 1 4 to this measurement to determine screen height.
Move halfway down the opening and measure again.
Check your height measurements in 3 places both ends and the center and use the smallest of the 3 measurements.
If your old sliding patio screen door is available simply measure the length and width and give us those measurements.
For the height measure from the top of the bottom track into the top u channel see the diagrams below.
Measure from the top of the track at one end of the door down to the threshold on the ground with a tape measure.
Then move the measuring tape down 6 inches above the bottom of the door frame and measure from side to side again.
Write down the measurement.