New London and Groton flooded basement cleanup

Landfalls along this shore include storms in 1903, 1938 and 1944, Carol in 1954, Donna in 1960 and Gloria in 1985 ^[1]. The 1938 storm remains one of the most destructive in New England's history ^[2]. Basements near the water flood first when surge arrives.

Seawater is contaminated. Soaked porous materials go, surfaces are cleaned and rinsed of salt, and heating and electrical equipment exposed to seawater is inspected or replaced.

Away from the shore, basements in Groton, Waterford and East Lyme take on groundwater in spring and flood when sump pumps fail in storm outages.

When a tropical storm or strong nor'easter is forecast, move valuables, documents and electronics out of the basement and crawl space storage. Clear gutters and drains, test the sump pump and its backup and know how to shut off the water and electricity. Photograph each room before you leave. Follow official evacuation orders, never walk or drive through floodwater and return only when officials say it is safe. Check for gas smells and electrical hazards before going downstairs.

Raising the furnace, water heater and washer on platforms where possible limits the damage when water does arrive.

After removal, cleaning and rinsing, dehumidifiers and air movers dry the slab, foundation walls and framing until they read normal. Salt residue left in wood keeps it damp, so rinsing first matters.

Describe how deep the water is, whether it was seawater, groundwater or a drain backup, whether the basement is finished and whether heating equipment got wet.

Away from the immediate shore, most houses have full basements, many finished. High groundwater near the coast and rivers means basements seep during long rains and spring thaw. A sump pump keeps up until the power fails or it wears out; then water spreads across the floor and into carpet and drywall. Cleanup follows the usual steps: extraction, removing pad and lower drywall where needed, cleaning, then drying the slab and framing. A battery backup pump and a high-water alarm are worth adding afterward.

Extend downspouts and clean gutters to reduce the water reaching the foundation in the first place.

At the head of the Thames, Norwich has older multi-family houses on hillside streets with shared basements, stone foundations and old floor drains. When those basements flood, every household's storage and the building's boiler are affected, and owners should tell every tenant right away.

Pumping and tear-out usually take a day, cleaning and rinsing another, and drying four to seven days, longer in cold early-spring basements.

When the basement is dry and clean, rebuild with materials that survive water: tile or vinyl plank, rigid or closed-cell foam insulation and wall panels that stop short of the slab. Raise the washer, dryer, furnace and water heater on platforms where possible, and use flood vents in enclosed areas below the living space so water can flow in and out instead of pushing on the walls. Keep storage in sealed bins on shelves and important papers upstairs.

Review your flood insurance each year before hurricane season, and keep a dated video of what is stored on the lower floors. ^[3]

A damp smell weeks later means something was missed: a box behind the furnace, wet insulation in the rim joist or salt left in the framing drawing moisture. Ask for readings before rebuilding.

After major coastal storms, many houses on a low street need help at once and contractors get busy. While you wait, keep everyone out of the water, photograph the basement thoroughly, move belongings above the water line if it is safe and keep the house closed on humid days. Your insurer will want photos taken before cleanup began, and flood insurance claims usually need a detailed list of what was damaged.

Neighbors sharing information about which contractor is coming when can help everyone plan.

Some outlying homes have wells and septic systems. If floodwater reached the wellhead or basement well equipment, have it checked and the water tested before drinking. A saturated leach field may need time to recover.

Standard homeowners policies generally exclude outside flooding, which flood insurance covers. Flood policies often limit coverage for basement contents and finishes, so review what yours includes before storm season. Sewer backup and sump overflow are usually separate again and often need a water backup endorsement. Report losses promptly and keep photos and a list of everything discarded, with rough ages.

If water reached the electrical panel, outlets or wiring, have an electrician inspect them before power to the basement is restored. Seawater is especially corrosive, so damaged components are usually replaced rather than dried and reused.

After surge water or groundwater, the usual scope is removing carpet and pad, cutting drywall above the highest wet reading, pulling wet insulation and discarding soaked furniture and storage. Concrete and framing are cleaned, rinsed of salt if the water came from the Sound, disinfected where needed and dried. Rebuilding with materials that tolerate water, such as tile, vinyl plank, rigid foam insulation and wall panels that stop short of the slab, makes the next event much less painful.

If your home sits in a mapped flood zone, ask the town building department about any rules before rebuilding after major damage.

Gas and oil equipment that sat in water must stay off until a technician has checked it. Seawater is especially hard on controls, so replacement is common. Oil tanks that shifted or leaked need the fuel supplier and fire department.

Photograph everything before discarding. Cardboard, paper and upholstered items soaked by outside water usually go. Plastic bins and hard items can be washed, rinsed and disinfected.