Mercury Insurance has published guidance urging homeowners to address maintenance issues - roof shingles, plumbing drips, clogged gutters, cracked caulk, HVAC upkeep and overhanging branches - before they escalate into larger problems.
Adam Bakonis, Mercury's director of homeowner product management, framed the message around prevention. "Home maintenance is easy to postpone because many problems don't look serious when they first appear. The problem is that water and weather can continue causing damage in places homeowners may not see," Bakonis said.
For insurance professionals, Mercury's list reads less like general consumer advice and more like a checklist of the exact failure points that generate the most disputed claims in the industry. Every item on it sits directly on the line between what a standard homeowners policy covers and what it explicitly excludes.
Standard homeowners policies generally cover sudden and accidental water damage - a burst pipe, a supply line failure - while excluding damage traced to gradual leaks, seepage or deferred maintenance.
Water damage and freezing account for approximately 22.6% of all homeowners insurance claims by frequency, according to Insurance Information Institute data based on 2023 figures - the second most common claim type after wind and hail. The average private homeowners insurance claim for water damage is $15,400, according to the same III dataset covering the 2019-2023 period.
Water damage is also the claim category carrying the highest denial rate of any type - approximately 10% by industry estimates - precisely because so many disputes turn on whether damage happened suddenly or built up gradually over time, a distinction adjusters and homeowners frequently see very differently.
Mercury's own guidance acknowledges this directly, noting that homeowners insurance "generally isn't intended to pay for deterioration, wear and tear or damage caused by a lack of maintenance."
This is Mercury's second consumer maintenance release this year, following a similar spring-timed publication in March that connected roof, gutter and drainage upkeep to claims frequency. Claims handling teams have noted that a significant share of weather-tagged losses ultimately trace back to maintenance-related failures rather than external storm damage - the same underlying pattern this release addresses from the consumer side.
The gap between a legitimate maintenance denial and a bad-faith claim has generated real litigation.
In one recent Pennsylvania case, a couple sued their insurer after it classified a water supply line failure as vandalism rather than a covered loss, allegedly to trigger a vacancy exclusion. In Florida, an appeals court sided with an insurer that denied a windstorm claim reported nearly two years after the loss, citing a policy clause excluding wear and tear and repeated water leakage alongside a prompt-notice requirement.
These cases illustrate why the maintenance distinction Mercury is asking consumers to take seriously is also one carriers are increasingly scrutinising and, in some disputed cases, allegedly stretching to avoid payment.
For agents, Mercury's maintenance list is a ready-made framework for a coverage conversation that goes beyond claims prevention into genuine E&O risk management.
A client who experiences water damage from a slow leak they had noticed but not addressed is at meaningfully higher risk of a denied claim than one whose pipe burst without warning. A client who understands that distinction before a loss occurs is less likely to blame their agent when a claim does not go the way they expected.
Given how sharply carriers have tightened policy language and documentation requirements around water damage and roof claims in recent years - particularly in catastrophe-exposed states - agents who proactively walk clients through what "sudden and accidental" actually excludes, using concrete examples such as a slow plumbing leak or deferred gutter cleaning, are building the kind of documented client understanding that protects both the client and the agent if a dispute arises later.
The 10% denial rate for water damage claims does not exist because carriers are systematically acting in bad faith. It exists because the coverage boundary is genuinely ambiguous in a significant share of real-world loss scenarios, and because most clients have never had the conversation that would help them understand where that boundary sits before they file a claim and find out the hard way.
