River hollow weather on Chester roofs
Chester is hill country cut by brooks, and most houses sit either in the sheltered hollow of the village or on wooded slopes above it. Shelter from wind is the upside. The downside is shade and debris: oaks and maples hang over many roofs, so leaves pack the valleys and gutters, moss grows on the north slopes, and branches come down in ice storms. Winter snow lingers on shaded roofs longer than it does in the open, which feeds ice at the eaves and the freeze and thaw cycling that works old flashing loose. The river adds damp air that keeps shaded shingles from drying out.



