Water damage is increasing, what buildings need to know

Water has passed fire as the top building risk

Water damage now eclipses fire and theft, and the numbers keep climbing. In 2013 it was about 44 percent of insurance claims costs in Canada. By 2018 it was over 60 percent, a near 40 percent jump in five years (Insurance Bureau of Canada). About three-quarters of real estate water losses come from the ordinary discharge of plumbing, HVAC and appliances, not the weather.

The case of 432 Park Avenue

Statistics tell you the scale. One building tells you the stakes. 432 Park Avenue, once the world's tallest residential tower and a symbol of luxury living, has not been immune. In late November 2018 a failed flange on the 60th floor compromised the high-pressure water piping, and days later a line failure on the 74th floor sent water into elevator shafts and disrupted service for weeks. One resident faced more than $500,000 in damage several floors below the source, and a buyer walked away from a major purchase citing a catastrophic flood. If the most exclusive tower in New York is exposed, so is everyone else.

Why water damage is rising

The 432 Park incidents are symptoms, not outliers. The drivers, drawn from industry analysis including Aon's water risk work, cluster into a few themes:

• Aging infrastructure and heavier use. Older internal and external piping under more load fails more often.
• Construction quality and deferred maintenance. Poor workmanship, cheap fittings and skipped maintenance turn small issues into large ones.
• Design and equipment placement. Concealed piping, green roofs and vertical construction add risk when they are not planned and maintained for water.
• System pressure. This one is unique to tall buildings, and it deserves its own section.

Pressure is the high-rise multiplier

City water pressure only reaches about the seventh floor on its own. Taller buildings install booster pumps, which raise pressure throughout the system. Those pressurized lines, often four to six inches across, can unleash catastrophic flow if they break. A minor rupture can run into millions within minutes. The same height that defines a high-rise is what makes its water failures so severe.

The costs, and the insurance fallout

Water damage is expensive to remediate because modern walls are built in layers for sound and fire, and steel studs collect water at the base and corrode. The financial strain then reshapes insurance. Strata liability coverage has risen by as much as 50 percent in some markets, deductibles specific to water are climbing, and insurers increasingly demand risk assessments, claims data and a documented water damage plan, sometimes as early as construction. The clearest way to push back is proactive risk management, which we cover in depth in how to reduce water damage losses with proactive risk management.

Getting ahead of it

The buildings that win treat water as a managed variable. Water sensors in critical areas like elevator shafts and along main lines catch a leak early, automated shutoffs stop a surge before it spreads, and a response plan turns an incident into a contained event. The full playbook is in effective leak mitigation strategies, and a year of real catches is in a year of leak catches. The upfront investment is easily justified by the losses it averts.

Frequently asked questions

Is water damage really more common than fire? Yes. It is now the leading cause of building loss by both frequency and claim dollars, and the trend is still rising.

Why are high-rises hit harder? Booster pumps raise system pressure to serve upper floors, so a break releases far more water, and that water cascades down through the building.

What is the highest-impact prevention step? Pairing early detection with automatic shutoff in high-risk areas, backed by a response plan and a monitoring center that acts when no one is on site.