Using the flat roller, he presses the spline against the screen over the groove, seating them both. But he presses them in only partway, just enough to hold the screen.

Remove your screen door. Lift it up and pull it out. Lay it down flat on a solid surface, ideally a garage floor. Step 2. Pull out the old spline and screen.

Discard the old screen and spline and leave your frame flat. Cut and place your new screen. Next, use scissors to carefully cut your new screen material to size.