Tier-on-tier shutters Tier-on-tier Shutters Home / Tier-on-tier shutters What are they? Tier on tier shutters consist of two sets of panels, one on top of the other, that operate independently from one another. Best For : Tier on tier shutters generally work best in bathrooms, bedrooms and dining rooms. Cons : Not suitable for all types of windows as it may look too busy. Pros : Tier on tier shutters give ultimate privacy and control of light.