How to finish the edge of a slate roof

Seeing different approaches online but not sure what’s correct. How do roofers finish off the sides of a slate roof properly?

Asked by Sharon on 26th Aug 2025
Expert Trade Answers
"To finish the edge of a slate roof properly, the slates should be cut neatly and allowed to overhang slightly so rainwater runs off cleanly. Traditionally, roofers would bed the edge in mortar, but nowadays most people go for a dry verge system because it lasts longer, doesn’t crack, and needs less maintenance. At the bottom edge, the slates should sit into the gutter with a small overhang, and at the top they’re finished off with ridge tiles, either mortar-bedded or a modern dry ridge system. The key thing is making sure the edges are watertight, tidy, and secure so the roof not only looks right but also lasts."
Answered on 26th Aug 2025 - Member since Aug 2025 - report
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