How should you finish tile edges at exterior corners to prevent chipping?

• A. Use edge trim (metal or plastic), bullnose for rounded corners, or caulk in gaps where appropriate.
• B. Round off edges with sandpaper until smooth.
• C. Leave tile edges exposed with no trim.
• D. Use leftover grout to fill the edge.

Answer: (A)

Finishing exterior tile edges with a proper trim or profile protects the edge from impact and creates a clean, durable transition against moisture. The best approach is to install edge trim (metal or plastic) along the exposed edge, use bullnose pieces for rounded corners, or caulk gaps where appropriate to seal movement and water ingress. Edge trims and bullnose profiles are built to resist chips and provide a smooth, finished edge, while caulked gaps accommodate expansion and keep the joint watertight.

Rounding edges with sandpaper isn’t suitable because it can damage the glaze, create an uneven edge, and still leave the edge vulnerable to chipping. Leaving edges exposed without any trim invites chips and wear over time. Filling the edge with leftover grout isn’t durable or flexible enough to serve as a protective edge and can crack or crumble.