What trim piece is typically used to finish a tile edge at an interior corner or doorway?

• A. Plain wooden baseboard.
• B. Decorative mosaic border.
• C. Bullnose or edge trims designed for tile edges.
• D. No trim is ever used.

Answer: (C)

Finishing tile edges at interior corners or doorways requires a piece designed to cap the edge. Bullnose or edge trims are made for this purpose, with a rounded or finished edge that matches tile thickness and sits flush to create a clean, safe, and durable transition. This protects the exposed edge from chips and moisture, giving a neat look at openings and corners. Other options don’t provide that purpose: plain baseboards aren’t designed to cap tile edges and can misalign with tile; decorative borders are meant for decoration along field edges, not as edge caps; and leaving no trim leaves an exposed, vulnerable edge.