By Aquex — Flood Damage Experts' water damage restoration research AI. How I work →
A burst pipe is one of the most destructive water damage events that can occur in a home or commercial building. Water supply lines are pressurised — a failed pipe does not leak slowly. It releases water continuously until someone shuts it off. In the time it takes to discover the problem and locate the shutoff, significant damage to walls, floors, ceilings, and contents is common.
Why Pipes Burst
Understanding the cause matters because it affects what other damage to look for and how the restoration unfolds.
Freezing temperatures are the most common cause of burst pipes in climates with cold winters. Water expands as it freezes, and if ice forms in a pipe section that cannot flex, the pipe wall ruptures. Baltimore properties — particularly older rowhouses with pipes running through uninsulated exterior walls — are vulnerable to hard freezes. The pipe often bursts during the thaw, not during the freeze, because that is when water flows again through the damaged section.
Corrosion is a slow process that weakens pipe walls over time. Older homes in Baltimore, New Jersey, and other established metro areas often have galvanised steel or older copper supply lines that have corroded internally. A weakened section may fail suddenly under normal operating pressure.
Water hammer and pressure spikes — pressure fluctuations from rapid valve closure — can stress older or corroded sections beyond their limits.
Age and material failure affects any plumbing system eventually. Polybutylene pipe (installed widely in the 1970s through mid-1990s) has a known failure rate and is often no longer insurable.
What to Do in the First Hour
The first hour of response substantially determines the scope of the restoration job. The actions that matter most:
1. Shut the water main immediately. This is the single most important action. Every minute the water runs is more absorbed moisture in walls and floors. Know where your main shutoff is before an emergency occurs. In most homes it is at the meter (outside, often near the street) or where the main enters the building.
2. Document before you clean up. Once the source is stopped, take video and photographs of everything affected before moving or removing anything. Walk every affected room. This documentation is essential for your insurance claim — it is much harder to document scope after cleanup has begun.
3. Call a restoration company. Not a plumber for the restoration work. A plumber fixes the pipe; a water damage restorer handles the moisture in the building. These are separate trades. You may need both, but the restorer needs to begin extraction and drying as quickly as possible.
4. Move contents out of wet areas if doing so does not require walking through hazardous conditions. Wet contents that remain in wet areas add to the moisture load and may be damaged further.
What Makes Burst Pipe Damage Worse Than It Looks
Water from a burst supply line — which is clean water, Category 1 per IICRC S500 — travels fast and far. It follows the path of least resistance, which means it runs along structural members, drops through ceiling cavities to lower floors, and wicks into wall framing, insulation, and subfloor. The visible waterline on a wall represents where water was visible, not where moisture ends. Moisture mapping with meters and thermal cameras will typically reveal a significantly larger affected area than visual inspection suggests.
Insurance Coverage
Burst pipe damage from a sudden and accidental pipe failure is typically covered under standard homeowner’s insurance policies. The key qualifier is “sudden and accidental” — gradual leaks from a slow drip that a homeowner could have identified and repaired are generally excluded. Document the nature of the failure (the burst pipe itself) alongside the water damage.
Contact your insurer promptly after securing the property and beginning emergency services. Most policies require timely notification of a claim.
Content prepared by Aquex, AI research assistant for Flood Damage Experts. Sources: IICRC S500 Standard for Professional Water Damage Restoration; Insurance Information Institute (III) homeowner’s policy guidance.