Hour zero: safety
Do not enter standing water in a basement with energized electrical outlets, a submerged panel, or submerged appliances. If you can shut the main breaker off without standing in water, do it. If you cannot, call the utility or an electrician. Gas appliances that have been submerged — water heaters, furnaces — should be evaluated before being operated again.
If the water is or might be sewage, treat it as a health hazard. Do not wade in, do not run a shop vac through it, and do not put children or pets anywhere near it. That category calls for professional response with proper protective equipment.
Hour one: identify what the water is
The restoration industry sorts water into three categories, and the category drives everything that follows.
- Clean water from a supply line, water heater, or overflow with no contaminants. Most contents are salvageable if dried fast.
- Grey water from appliances, or clean water that has sat long enough to grow biological load. Some porous items must go.
- Black water from sewage backup or from storm runoff that crossed streets and yards. Porous materials it touched are generally unsalvageable, and professional handling is warranted.
Storm water in Rockville is black water. It picks up whatever was on the streets and lawns it crossed on the way to your window well, and it should be treated accordingly regardless of how clear it looks.
Hours one to six: document, then extract
Photograph and video everything before you move a single item — the water level, the affected rooms, damaged contents, the apparent entry point. Then start an inventory of damaged property. Insurers ask for this and you cannot recreate it later. Only after documenting should you begin removing water.
Pump or extract with equipment sized for the volume. Then get soaked contents out immediately: carpet pad, cardboard boxes, upholstered furniture, mattresses, and particleboard furniture hold enormous quantities of water and begin growing quickly. Solid wood furniture and non-porous items can usually be dried and kept if you move fast.
Hours six to twenty-four: open the wet assemblies
This is the step homeowners most often skip and most often regret. Drywall wicks water upward well above the visible line, and the insulation behind it holds far more than the drywall does. A flood cut — removing a band of drywall above the water line, typically 12 to 24 inches, plus the insulation behind it — lets the cavity dry. Baseboard comes off, and carpet and pad come up.
Closing a wet cavity behind intact drywall is the single most reliable way to guarantee a mold job six weeks later. If you take one thing from this article, take that.
Days one to five: dry it properly
Drying is a measurement problem, not a time problem. Professional response uses air movers to break the boundary layer at wet surfaces, commercial dehumidifiers to pull the moisture out of the air, and moisture meters to document material readings daily until they reach dry standard. That usually takes three to five days, sometimes longer for dense materials like framing and subfloor.
Household box fans move air but do not remove water from it. And opening the windows to help, in a Maryland summer, actively adds moisture to the space. If you are drying without dehumidification during humidity season, you are mostly redistributing water.
Then: fix why it happened
Once the structure is dry, deal with the cause. Depending on what happened that means clearing and testing window well drains, extending downspouts six to ten feet, regrading the first six feet of soil, servicing or replacing the sump pump and adding a battery backup, installing a check valve or backwater valve if a sewer backup was involved, or adding an interior perimeter drain in a persistent case. Our prevention guide works through the whole list in priority order.
Insurance notes for Maryland homeowners
Report the claim promptly, keep every receipt including for equipment rental, and do not dispose of damaged property until you have documented it and, ideally, until the adjuster has seen it or released you to proceed. Coverage generally follows the source: sudden internal failures such as a burst pipe are commonly covered, surface and stream flooding typically requires separate flood insurance, and sewer or drain backup is usually an optional endorsement. Mitigation — taking reasonable steps to prevent further damage — is expected of you under most policies, so acting quickly is both the right call practically and the right call for the claim.