Why Floating LVP Has to Be Glued on Stairs

Your floor floats. Your stairs can't.
Stairs take point loads
Every step lands on the front edge. A floating plank there shifts, squeaks and eventually pops loose.
What to use
We recommend Roberts 7350 Universal, sold at most flooring and big-box stores. Spread it on the nose, the back fill and the riser, press each piece, and weight it while it cures.
The top step
Where the top nose meets the floor, trim the tongue off both pieces so they butt cleanly, then glue generously underneath — no click lock is holding that joint.