01
Give the cricket real slope
A decorative bump with flat pockets is not enough. The cricket planes should drain positively into the adjacent roof or valleys without reversing water beneath the slate.
02
Layer flashings in drainage order
The cricket covering, back pan, side flashings and counterflashings must overlap so each higher layer discharges onto the lower one. Concealed corners deserve particular attention.
03
Leave room for snow and debris
Large chimneys can trap drifting snow and leaves. Provide sufficient width and accessible drainage paths rather than relying on sealant at a congested back corner.