Morristown sits in the Whippany River watershed, and portions of the borough lie within FEMA Special Flood Hazard Areas. The Whippany flooded severely during Tropical Storm Floyd in 1999, and significant flood events have recurred at roughly decade intervals. Morris County averages 47 inches of annual precipitation, above the national average, keeping flood risk persistent.
Ice dams form on the steeply pitched roofs common in historic Morristown each winter, driving water under roofing materials into attic spaces. Older plaster walls and wide-plank hardwood floors common here extend drying timelines to seven to ten days or longer. Wet materials left too long cause irreversible warping and mold onset.
New Jersey homeowners policies cover sudden internal water losses but exclude groundwater and seepage. Properties near the Whippany should carry separate NFIP flood coverage. Ask your contractor for IICRC S500 certification and daily moisture logs.