You walked into the basement and the carpet squelched. Or you heard water running behind a wall. Or you came home to a ceiling stain that was not there this morning. However it started, the situation is the same. Water is somewhere it should not be, and you are trying to work out what to do first.
Water damage is a race against absorption. The longer water stays in contact with building materials, the further it travels and the more of your home it converts from wet to damaged. What you do in the first hour matters more than what you do on day three. Here is a plain guide to the first hour, the first six, and the first 24.
Before anything else, check for hazards
Do not grab a towel yet. Look at three things.
Electricity. If water is near outlets, an electrical panel, a furnace, or anything plugged in, do not walk into it. Standing water and live current are a lethal combination. If you can reach your main breaker from a dry spot, shut off power to that area. If you cannot reach it without stepping into water, leave the house and call your utility or the fire department.
The water itself. Clean water from a supply line is one thing. Water from a toilet, a sewer line, or a flooded street is another. If it smells, if it is cloudy, or if it came up through a floor drain, treat it as contaminated and stay out. That is sewage cleanup territory, and it needs protective equipment and disinfection you do not have in your garage.
The structure. Ceilings hold water. A drywall ceiling that is sagging, bulging, or dripping from several points is carrying a load it was never built for, and it can let go all at once. Get everyone out of that room. Do not stand under it to take a picture.
If any of those three are in play, the right move is not cleaning. It is leaving. A gas smell, a failing ceiling, or an electrical hazard you cannot isolate means you call 911 from outside.
The first hour
What to do
- Stop the source. Shut the fixture valve if there is one. If not, shut the main water valve, usually where the service line enters the basement or crawlspace, or near the meter.
- Kill power to the wet area at the breaker, if you can do it from dry ground.
- Move what you can lift. Get rugs, electronics, documents, and anything with fabric or paper out of the water. Furniture legs sitting in water wick moisture up into the piece.
- Photograph everything before you touch it. Wide shots of each room, then close shots of the source, the standing water, and any damaged contents. Do it even if you are unsure about filing. It is the record you cannot recreate later.
- Call a restoration contractor. Not tomorrow morning. Emergency response is a 24 hour service for a reason, and the drying clock starts the moment the water lands.
What not to do
- Do not use a household vacuum on standing water. It is not rated for it and you can be shocked.
- Do not turn on ceiling lights or fans in a room with a wet ceiling. The fixture box may be full of water.
- Do not throw damaged items out before they are documented.
- Do not assume that because a surface looks dry, the assembly behind it is. Surfaces lie.
What is happening in the building while you decide
Water moves by gravity first and capillary action second. It runs down through floor assemblies and along the tops of joists, then it climbs. Drywall, framing, insulation, subfloor, and carpet pad all pull moisture sideways and upward into material that never got splashed. That is why a leak in one corner shows up as a damp baseboard three rooms away.
At the same time, moisture leaves wet materials as vapor. Humidity in the space climbs and dry materials start absorbing from the air. That is secondary damage, and it is how a contained plumbing failure turns into swollen cabinet bases, cupped hardwood, and delaminating trim.
Then there is biological growth. Mold spores are already in every building. What they need is moisture, an organic food source, and time. Paper faced drywall and wood are food. Nobody can tell you the exact hour growth starts, because it depends on temperature, humidity, and material. What is reliable is the direction. Every hour wet material stays wet moves you closer to a mold remediation job instead of a drying job.
The first six hours
By now the source is off and a professional is on site or on the way. While you wait:
- Get the bulk water out if it is clean water and the room is safe. A wet/dry shop vacuum, a mop, and towels all help. Extraction removes far more water per hour than evaporation.
- Lift and prop. Put foil or wood blocks under furniture legs, take up loose rugs, and open cabinet doors under a wet sink so air reaches the cavity.
- Manage the air carefully. If it is dry and mild outside, opening windows helps. If it is humid or freezing, keep them shut and run air conditioning or heat instead. Humid outdoor air blown across wet materials slows drying.
- Do not run fans on contaminated water. Air movement over a sewage backup or floodwater spreads contamination through the house. Leave that room closed.
- Call your insurer and open a claim. Report the date, the cause, and the rooms affected. Ask what your policy requires you to do to prevent further damage, because most policies place that duty on you. Our page on insurance claims covers the paperwork.
The first 24 hours
This is where the job shifts from water removal to controlled drying. Standard practice looks like this.
Assessment and moisture mapping. A technician uses moisture meters, often with thermal imaging, to trace how far the water actually traveled, then records readings at set points. Those readings are the baseline that shows the structure is drying and, later, dry.
Water category. The industry sorts water into three categories. Category 1 is clean water from a sanitary source. Category 2 carries significant contamination, washing machine discharge for example. Category 3 is grossly contaminated, including sewage and most flood water. Category decides what can be dried and saved versus what must be removed, and it changes over time. Clean water sitting warm long enough degrades into a higher one.
Extraction and selective removal. Remaining water is extracted, and materials that cannot be dried in place come out. That may mean carpet pad, saturated insulation, or a controlled cut of drywall above the water line so the cavity can be reached.
Structural drying. Air movers create airflow across wet surfaces to speed evaporation, and dehumidifiers pull that moisture out of the air so it does not resettle elsewhere. The two together are the system. Fans alone just move humidity around. Equipment usually stays in place for several days with daily readings, and how long varies with the material, the water volume, and site conditions.
Antimicrobial treatment where appropriate. On contaminated losses, affected surfaces are cleaned and treated. That is part of the work, not a substitute for drying or removal.
The mistakes that cost the most
- Waiting until morning. Overnight is where clean, dryable losses turn into demolition.
- Closing the wall back up too early. Seal it damp and you find out months later, by smell.
- Using separate companies for cleanup and repair. The handoff is where scope and accountability get lost.
If you need someone now
Restorehaus Restoration serves Westchester and Putnam Counties in New York, Lower Fairfield County in Connecticut, and the five boroughs of New York City. We answer around the clock and target 60 minutes on site. Our technicians are IICRC certified, and the company is licensed and insured.
We are also a licensed general contractor, so the same team that handles the water damage restoration carries the job through the rebuild. In most cases we bill your insurance directly, and the inspection is free with no obligation.
Call (914) 610-4024 any hour, or reach us through our contact page. If you are not sure whether what you are looking at is serious, call and describe it. It costs nothing, and it beats guessing.