Soldered copper flashing for a rooftop watershed.
Synopsis: A chimney cricket is a mini-roof that helps shed water away from the vulnerable intersection of a sloping roof runs and the back of a chimney. In this article, the author shows how to make a soldered copper cap for a cricket.
The best place for a chimney to exit a roof is at the ridge. Water will run away from the chimney, not toward it, and flashing becomes a fairly simple matter. Builders in New England did this back in the days before sheet metal was readily available.
When you move a chimney downslope, however, runoff will strike it, often forcing water up under the flashing and down into the house along the bricks. Leaves and other debris can build up behind the chimney and decompose into a moisture-laden compost that rots roof boards and corrodes the flashing. The way to avoid this mess is to build a…