What the weather does to a Norwalk roof
The southern half of Norwalk feels Long Island Sound directly. Salt in the air wears the surface off shingles sooner than it would inland, and galvanized flashing, nails and vents in Rowayton and East Norwalk rust ahead of schedule. Wind-driven rain from a nor'easter comes in low and pushes under tabs and sidewall flashing. Low ground near the harbor carries storm surge risk, which is a water problem below the roof rather than on it. Toward the Merritt the lots are wooded, so northern Norwalk sees shade, moss and leaf-filled gutters, plus enough snow for ice to form at the eaves over cold attics.

