Roller garage doors have limited design options due to the hinged panels (laths) having to roll around the drum when opening and closing. Minor scratches can develop over time because small debris may get caught between the laths during the door's movement over the drum. Additionally, these doors are not as insulated as sectional garage doors.
Depending on the manufacturer, some roller doors require lithium batteries for the bottom safety edge, which stops the door when an obstruction is detected. These batteries need replacing every couple of years, and a warning light will activate on the control box when the batteries are running low. In the event the lithium batteries completely drain, preventing you from opening and closing the door for safety reasons, the door can be accessed via the hold-to-run function (holding the up or down button on the remote or control box). The procedure to replace the batteries is straightforward.