The cresting and finial are clipped on to the ridge, not in a channel, thus eliminating leaks.

The special ridge capping is positioned and tapped into place. This ridge cap allows the finial to be fitted without any need for screws. Then the cresting is clipped into place.

This component wasn’t designed for looks alone: it means there are no holes in the ridge cap, and no channel where water can collect. Two major causes of leaking are eradicated by this innovation.