How far water spreads from what you can see
Water follows gravity, but it also wicks. Drywall draws water upward from the floor by capillary action, often several inches above the visible waterline, and insulation, carpet pad and wood absorb water they are not directly submerged in. Water also runs along pipes, joists and the back side of cabinets, so the stain on a ceiling can be far from the leak.
Signs the wet area is larger than it looks:
- Baseboards that are cool, damp or separating from the wall.
- Paint that bubbles or wallpaper that peels above the visible waterline.
- Flooring that cups, crowns or feels springy.
- A musty odor in a room that looks dry.
- A wall that feels cooler than its neighbors, which a thermal camera shows more clearly.
Only a moisture meter reading compared against dry material tells you where the wet boundary is. For the process of mapping and drying, see water damage restoration.
Water categories in plain terms
Restoration standards describe three broad categories of water by source and contamination level. A technician assigns the category after inspecting the property; the descriptions below are for orientation only and a website cannot assign one.
| Category | Typical sources | Why it matters |
|---|---|---|
| 1: clean at the source | Supply line, tub overflow with clean water, rain through a roof in some cases. | Starts clean but can degrade as it sits or contacts soiled materials. |
| 2: significantly contaminated | Washing machine or dishwasher discharge, toilet overflow without feces. | May carry contaminants; porous materials are more likely to be removed. |
| 3: grossly contaminated | Sewage, rising floodwater, water from outside the building. | Requires protective equipment and removal of absorbed porous materials. |
Time and temperature can move water to a higher category. This is another reason to start early, and to avoid walking through water that might be contaminated.
If you are not sure what you are looking at, describe it and ask.
Documentation for an insurance claim
This is general information, not insurance advice. Policies and claims practices differ. Common documentation includes:
- Photographs and video of the source and every affected room before items are moved.
- The time you discovered the problem and the steps you took, including when the water was shut off.
- A list of damaged belongings with approximate age and value, kept separate from the structure.
- Moisture readings and drying logs from the restoration provider.
- Receipts for emergency expenses.
- The failed part, when removed by a plumber, if the insurer might want to see it.
Call your insurer promptly and ask what they need before discarding anything. Whether damage is covered depends on the policy and the cause; flood damage, for instance, is generally covered only under separate flood insurance. A restoration company can describe what it found but does not decide coverage.
Protecting pipes before a freeze
Pipes freeze where they are exposed to cold air and not warmed by the house: attics, exterior walls, garages, crawlspaces and outdoor connections. Practical steps before a forecasted hard freeze:
- Disconnect and drain garden hoses; cover outdoor faucets and know where irrigation shutoffs are.
- Open cabinet doors on exterior walls so room air reaches the pipes.
- Let a faucet fed by an exposed line drip slightly during the coldest hours, as recommended by many utilities.
- Keep the heat on, including in unoccupied rooms, and set a thermostat that will not drop far if you travel.
- Learn where the main shutoff is and make sure it turns.
- Insulate exposed lines in unheated spaces with materials rated for it.
NWS Fort Worth is the source for forecasts and warnings. For what to do after a failure, read burst pipe cleanup and use the checklist.
Source notes
- NWS Fort Worth, forecasts, warnings and DFW climate normals
- IICRC S500 Standard for Professional Water Damage Restoration, source of the three-category framework; summarized here in general terms, not reproduced; not yet reviewed in full