Is river floodwater different from rainwater inside a house?
Yes. River floodwater has picked up soil, silt and whatever else was on the ground, and it stays in a building longer than clean water from a supply line. That is why it is treated as the most contaminated category, and why the removal work is planned differently.
Clean water from a pipe that has burst can be pumped out and dried in place in many cases. River water is different. Once it has soaked into carpet pad, drywall paper and the bottom of a wall, the material cannot be made clean enough to keep, so the removal is wider. The crew explains which materials come out and why before the work starts.
A rain leak that comes through a roof or a window is usually a smaller, cleaner loss. River water that comes in from outside brings its own problems: it leaves a silt line, it can carry contaminants into the cavities, and it can keep a building wet long after the river has dropped. The first step is always to find out which of these you are dealing with.
What does a flood stage reading mean for my building?
A flood stage reading describes the river at one point, not the water in your building. The crew measures the actual water in each room, the materials it reached and the height of the silt line, and those measurements decide the work.
A gauge at a river crossing records the level of the river on that day. A building's floor can sit above or below that level, and its doorways, ditches and drains change how river water gets in. Two houses on the same street can take very different amounts of water from the same crest, which is why the crew does not estimate the work from the gauge alone.
The silt line on a wall is one of the most useful records. It shows how high the water stood, and the crew checks it against the moisture readings in the drywall and the framing below it. Owners often photograph the silt line before anything is cleaned, and that photograph is worth keeping.
How long does it take to dry a building after river water?
Drying usually takes longer than the removal, and it depends on how deep the water went and how much material it soaked. Readings are taken on each visit, and the drying is done when the readings in the floor, the wall and the framing return to normal.
Once the removal is finished, air movers and dehumidifiers run through the building. Framing and subfloor can take a long time to dry, especially in wet weather, when the air holds moisture and the equipment has less to work with. The crew does not guess at the time. It records the readings, sets the equipment, and comes back to read them again.
The owner can help by keeping doors and cabinets open, and by not closing a wet room with the heat or air conditioning set to a level that holds moisture in the air. The crew explains what helps on the first visit, and the readings show whether the drying is working.
What should I keep before the crew cleans up?
Keep photographs of the silt line, each room and each wet item, a list of what was damaged, and any receipts for emergency work. Do not throw away items the crew has not yet looked at, because some of them can be cleaned and saved.
Take photographs of every room from the same spot before and after the water is removed, and include a ruler or a coin for scale on close shots of the silt line. Write down the time you found the water and the time it started to drop, if you can tell. Keep a list of the items you lost, with rough ages and where you bought them if you know.
Insurers ask for this record, and so do contractors who are asked to repair the building. A complete record makes the work easier to explain, and it protects the owner from decisions that were made without the evidence. The crew keeps its own record of each visit and gives you a copy.
Can the river water in my home make people ill?
River floodwater can carry bacteria and other contaminants, so people should avoid direct contact with it and wash thoroughly after handling anything it touched. Children, older adults and people with weakened immune systems need extra care around flooded materials.
Gloves, boots and a face covering are the minimum for anyone who must enter a room with river water still in it. Do not use the water for cooking, washing dishes or cleaning food surfaces, and do not drink it. Clothing that touched the water should be washed separately from other laundry.
If anyone develops a fever, a cough that will not clear, or a rash or skin wound that is slow to heal after contact with flood materials, a doctor should see them. Tell the doctor that the exposure was to floodwater. The crew can explain the work it does to reduce exposure, but it cannot diagnose anyone.