How is a stair lift attached to the staircase? The stair lift is attached directly to the stairs. 100% Get Free Quotes Today! Question: How is a stair lift attached to the staircase? Top Answer (100% of 2 votes): The stair lift is attached directly to the stairs.. Get Free Quotes Today! Find Local Pros Free Stair Lift Installation Cost Estimates Related Questions How Much Would It Cost to Install a Stairlift? Is it possible to install a stair lift outdoors?Top answer: In most cases Is it possible to install a stair lift on a spiral staircase?Top answer: In most cases What is the standard weight capacity of a residential stair lift?Top answer: Holds up to 250 lbs. How long does it typically take to install a stair lift? (straight stairs; two-man crew)Top answer: 2-4 hours