Make sure that the opening size is 1/2 inch larger to install the metal frame smoothly.
Clean the installation area and apply silicone to the bottom where the door threshold will be placed.
Remove the glass panels and place them in a safe location.
Position the frame level and screw one side of the frame. Mount the door on the fixed side, using two people—one person securing the top hinge and another person securing the bottom hinge while the door is at a 90-degree angle. Close the door and check if the space between the frame and the top of the door is equal. If not, make adjustments. With another person holding the frame, mount the other door and close it to check if any adjustments are needed before fully screwing the frame. If everything is correct, remove the doors again and screw the frame in place.