How can we help you? When do I need a stair lift? 1 out of 2 found this helpful Each person is different, but when you feel that getting up or down a flight of stairs is a struggle or unsafe, it may be time to consider investing in a stair lift. Was this helpful? Yes (1) No (0) Category: General Related Questions How much weight can a stair lift hold? How does the stair lift attach to the stairs? What happens if my stair lift breaks down? What happens in the case of a power outage?