How can we help you? How does the stair lift attach to the stairs? 1 out of 3 found this helpful Our stair lifts install directly to the treads of your stair case, not the wall. There is no need to reconstruct or reinforce walls in order to install. Was this helpful? Yes (1) No (1) Category: General Related Questions Can I take the arms off of the stair lift to make the seat wider? Are stair lifts expensive? Is a stair lift difficult to operate? How is the stair lift powered?