Almost everything written about water damage assumes the water came from inside the house. Storm and flood water is a different problem with different rules, and applying burst-pipe logic to it is how people lose both their belongings and their claim.
Flood water is contaminated from the first minute
Water from a failed supply line starts out clean and degrades over a day or two. Water that came in from outside never had that grace period.
By the time it reaches a basement it has crossed roads, lawns and parking lots. It has picked up fuel and motor oil, lawn chemicals, animal waste, and — in older municipalities with combined sewer systems, which includes a great deal of northern New Jersey — whatever was in the sewer when the system was overwhelmed. It is grossly contaminated on arrival, which the industry calls Category 3.
That single fact changes the entire response. With Category 3 water there is no drying porous material in place and hoping for the best. Anything absorbent that the water touched comes out: carpet and pad, wet insulation, particle board, upholstered furniture, mattresses. Drywall is cut above the high water line rather than dried.
This is not a judgement call about how bad it looks. Contaminated water does not become clean because it dried. The material is removed because of what was in the water, not because of how wet it still is.
What actually counts as a "flood"
This matters more than almost anything else, because it decides which policy pays — and the definition is narrower than people assume.
Under the National Flood Insurance Program, a flood is a temporary condition where water covers two or more acres of normally dry land, or affects two or more properties. So a pipe that bursts in your yard is not a flood. Storm drains overwhelmed across a neighbourhood, with water spreading onto multiple properties, is.
| Source of water | Which policy |
|---|---|
| Burst pipe, appliance failure, roof opened by wind during a storm | Homeowners — sudden and accidental |
| Rising water from outside: river, storm surge, overwhelmed drainage | Flood policy only. Excluded from homeowners. |
| Sewer or drain backup | Neither, by default. Requires a specific endorsement. |
Three categories, and most households carry two of them at most.
What a flood policy actually covers in a basement
This is where New Jersey homeowners are most often blindsided, because basement coverage under NFIP is far more limited than the headline number suggests.
Generally covered in a basement
- Furnace and water heater
- Electrical panel and wiring
- Central air equipment
- Washer and dryer
- Stand-alone freezer and the food in it
- Foundation walls, attached staircases
Generally not covered
- Furniture, rugs, electronics
- Finished walls and flooring
- Stored belongings and valuables
- Unplugged appliances
- Home-business inventory or equipment, at any value
Read that second column again if you have a finished basement. The drywall, the flooring, the furniture and the things in storage down there are, under a standard NFIP policy, largely outside what gets paid.
Three more limits worth knowing before you need them:
- Coverage caps. Residential NFIP tops out at $250,000 on the building and $100,000 on contents. Above that you are looking at private excess flood coverage.
- Contents valuation. NFIP contents are generally settled at actual cash value — depreciated — rather than replacement cost. Worth confirming on your own declarations page.
- The 30-day waiting period. A new flood policy, and any increase in coverage on an existing one, generally takes effect 30 days later. Exceptions are limited. You cannot buy this with a storm in the forecast.
Wind or water? The split that decides the claim
In a named storm, two different policies may be in play at once, and insurers have every incentive to attribute damage to the one that isn't theirs.
If wind opened the building — tore shingles, broke a window, lifted part of a roof — and rain then entered through that opening, that is typically a homeowners claim. If water rose from the ground and came in at the bottom, that is a flood claim. The same storm can produce both in the same house.
What settles the argument is the high water line. Photograph it before anything is cleaned: wide enough to see the whole wall, then close enough to read the height against a door frame or an outlet. That line is the physical record of how high the water rose, and once cleanup starts it is gone permanently.
Before you go back in
- Power. If water reached outlets, appliances or the panel, the circuit stays off until it has been checked. If the panel itself was submerged, do not touch it — that is a utility call.
- Gas. A submerged furnace or water heater is not restarted. Gas control valves that have been under water get replaced, not dried out and relit.
- Structure. Fast-moving water undermines footings and can move foundation walls. Visible new cracking, a door frame suddenly out of square, or a floor that has shifted means the building gets looked at before anyone works inside it.
- Well and septic. On an unsewered property, flood water contaminates both. The well needs testing and the system needs inspection before use.
Silt is not dirt
The layer of mud left after flood water recedes is sediment carrying everything the water was carrying. It should be removed while still damp — once it dries it turns to dust and becomes airborne, which spreads the contamination into parts of the house the water never reached.
Shovel and remove rather than sweep, and keep the area wet enough not to raise dust while you do it.
What can be saved
More than people expect, but not the obvious things.
Hard, non-porous items generally clean up: glass, metal, solid wood furniture, ceramics, tools, most dishes. Textiles sometimes survive professional cleaning, depending on the item and the exposure. Documents and photographs are often recoverable by freezing them promptly, which stops deterioration and buys time for proper treatment.
What does not come back: mattresses, upholstered furniture, carpet pad, wet insulation, particle board and most pressed-wood furniture, and any food, cosmetics or medication the water reached — including sealed containers, because the seals are not reliable against contaminated water.
Photograph everything before it is removed, and inventory it. An adjuster cannot pay for what there is no record of.
If you need help
This guide is published by Restorian Property Damage Restoration, an IICRC-certified restoration firm in Englewood Cliffs, New Jersey. We handle flood and storm damage, water extraction and structural drying, sewage backup, mould remediation, fire and smoke damage and reconstruction, 24 hours a day.
We cover all 21 New Jersey counties, New York (Rockland, Orange and Westchester plus all five boroughs) and Connecticut (Fairfield, New Haven and Litchfield). Town-by-town coverage is listed on our service areas page.