Which trim piece provides a finished edge on the outside of a tiled wall?

• A. Bullnose trim; use appropriate corner trims for outside corners.
• B. Square edge trim.
• C. Round tile edge trim.
• D. Chair rail.

Answer: (A)

Finishing the outside edge of a tiled wall requires a trim that creates a smooth, rounded termination and protects the tile edge from chipping. Bullnose trim is designed for this purpose: its rounded front edge provides a clean, finished look that matches the tile thickness, giving a safe and attractive edge along the exterior of the wall. For outside corners, you pair this with a matching corner trim to maintain the rounded profile and a neat corner transition.

The square edge trim would leave a sharp, angular edge instead of a softened stop. The round tile edge trim is used when the tile itself has a rounded edge or for specific detail work, not for finishing a flat outer edge in most standard wall applications. A chair rail is decorative and intended for a horizontal, higher-on-the-wall feature, not for finishing the exterior edge of a tiled surface.