The frame is pressure fit at all four corners.
It is important that all corners be square.
The frame assembly is complete.
Now for the insect screen mesh.
The correct spline diameter is selected.
The mesh is rolled into place.
The spline is pressed into place.
The mesh is neatly trimmed and the handles installed.
Final adjustments are made to the rollers at the bottom.
And, at the top.
Voila! A new sliding screen door.