Tier on tier Shutters have an independent panel at the top and bottom. By doing so you get greater flexibility in how much light enters your room, how much privacy or how much of the view from your window you want to see. The top tiers can swing out independent from the bottom allowing a choice of complete privacy or light flooding in the top with the bottom section closed or shutters partially open. This makes Tier On Tier Shutters a popular choice of plantation shutter