This Cartersville customer called me with a reoccurring leak around his chimney. When I inspected the roof, I immediately noticed the problem and I cringed! The previous contractor had built the chimney directly in the middle of a valley, AND there was no chimney cricket behind the chimney. A chimney cricket is a built up ridge line that is built up the middle of the back-side of a chimney. It exists to create valleys to channel the water that is running down the roof towards the chimney to flow around the chimney instead of splashing against it.