Burst Pipe or Water Leak? What to Do in the First 24 Hours

A burst supply line can release hundreds of gallons of water into a home in under an hour. Whether it happens while you are asleep, at work, or away for the weekend, what you do in the first 24 hours determines how much of your property is salvageable and how much your restoration ultimately costs.

Here is the step-by-step response, in the order it matters.

Step 1: Shut Off the Water Immediately

Find your main shutoff valve and close it. In most Long Island homes it is located in the basement or utility area, usually where the water line enters the house from the street side. Turn it clockwise until it stops.

If the leak is isolated to one fixture — a toilet, sink, or washing machine — there may be a local shutoff valve behind or beneath it that you can close instead.

Do this today, before you ever need it: locate your main shutoff and make sure it turns. Valves that have not been operated in years often seize. Finding that out during an emergency costs you time you do not have.

Step 2: Cut Power to Affected Areas

Water and electricity are a serious hazard. If water has reached outlets, appliances, or the electrical panel area, shut off power to those circuits at the breaker — but only if you can reach the panel without standing in water. If you cannot reach it safely, leave the house and call an electrician or your utility.

Never walk through standing water in a basement where the panel or major appliances are submerged.

Step 3: Document Everything Before You Touch It

This step protects your insurance claim, and most people skip it in the rush to start cleaning.

• Photograph and video every affected room from multiple angles
• Capture the water source itself — the failed pipe, fitting, or appliance
• Document damaged furniture, flooring, electronics, and personal belongings individually
• Get shots of standing water depth against walls and baseboards
• Do not discard damaged items until your adjuster has seen them or you have thorough documentation

Step 4: Call a Restoration Company — Do Not Wait for the Adjuster

This is the most important decision point. Many homeowners assume they need to wait for their insurance adjuster before anything can be done. That assumption causes enormous additional damage.

Your policy almost certainly requires you to take reasonable steps to prevent further damage. Beginning professional extraction and drying immediately is exactly that — and a reputable restoration company will document everything for your claim as they work.

Step 5: Notify Your Insurance Company

Report the loss and get a claim number. Be factual about what happened and when you discovered it. Keep a written record of everyone you speak with and what was said.

Sudden, accidental water damage from a burst pipe is typically covered under standard homeowners policies. Gradual leaks that went unaddressed over time often are not — which is another reason fast action matters.

The 24 to 48 Hour Mold Window

Mold can begin growing on wet drywall, wood, insulation, and carpet padding within 24 to 48 hours. Once that threshold is crossed, a straightforward water damage job becomes a mold remediation project, adding cost, time, containment requirements, and clearance testing.

This is why professional drying matters more than most homeowners realize. Surfaces can feel dry to the touch while framing, subfloor, and wall cavities remain saturated. Industrial air movers, dehumidifiers, and moisture meters are what confirm a structure is actually dry to standard.

What Not to Do

• Do not use a household vacuum to remove standing water — it is an electrocution risk and will not extract meaningfully.
• Do not assume it is dry because it looks dry. Hidden moisture behind walls is what causes mold weeks later.
• Do not throw everything out immediately. Document first, and let your adjuster or restoration company advise on what is salvageable.
• Do not delay because it seems minor. Water travels along framing and under flooring far beyond the visible area.

Common Causes We See on Long Island

• Frozen and burst supply lines in winter, especially in crawl spaces and exterior walls
• Failed washing machine and dishwasher supply hoses
• Water heater tank failures
• Clogged drain and sewer lines backing up into the home
• Aging copper and galvanized piping in older housing stock

Available 24/7 Across Long Island

Performance Restoration Inc. responds to water damage emergencies around the clock throughout Suffolk County and Nassau County. We handle extraction, structural drying, mold prevention, and full reconstruction — and we work directly with your insurance company and provide complete claim documentation.

Serving Oakdale, Sayville, Bayport, Blue Point, Patchogue, East Patchogue, Bellport, Brookhaven, Yaphank, and all surrounding communities.