Guides

Water damage prevention: a homeowner's checklist

A schedule of one-time fixes, seasonal checks and trips-away steps that cut your odds of a water claim, with the policy conditions each one protects.

4HomeownersInsurance · Published October 10, 2026

The most useful prevention steps are the ones that stop a small failure from running unattended: know where your main water shutoff is, replace rubber hoses before they burst, keep gutters and grading moving water away from the house, keep heat on in winter, and shut the water off when you leave for a long trip. Water damage is also the area where homeowners policies draw lines around maintenance, so a good habit protects both the house and the claim.

According to the Insurance Information Institute (Triple-I), using ISO data, water damage and freezing made up 22.6% of homeowners insurance losses in 2023, and from 2019 through 2023 averaged 1.50 claims per 100 house-years at $15,400 per claim. Those figures exclude Alaska, Texas and Puerto Rico (Triple-I, Facts + Statistics: Homeowners and renters insurance).

Why prevention matters for your policy

The standard HO-3 (form HO 00 03 05 11) pays for sudden and accidental water damage but excludes wear and tear, deterioration, rust, corrosion and faulty maintenance. It also contains conditions that turn on what you did before the loss. The freezing provision, for example, applies only if you used reasonable care to maintain heat in the building, or to shut off the water supply and drain the systems and appliances (ISO HO 00 03 05 11, Maine Bureau of Insurance copy). The "neglect" exclusion removes coverage for failing to use all reasonable means to save and preserve property at and after a loss. Prevention does not guarantee a claim will be paid, but a documented routine makes it harder for an insurer to call a loss gradual or neglected. See sudden vs gradual water damage: where insurers draw the line for how that argument works.

One-time fixes

Do these once and review them every few years.

Find, label and test the main water shutoff. Everyone in the house should know where it is. Triple-I lists knowing the location of the main shutoff valve as a basic step. A valve that has not been turned in a decade may be stuck, so exercise it and replace it if it will not close.
Replace rubber supply hoses. Triple-I advises inspecting hoses to water heaters, dishwashers, washing machines and refrigerator ice makers every year and replacing them all every five to seven years (Triple-I, How to protect your home from water damage). Braided stainless-steel replacements are a common upgrade; check the manufacturer's date on any you buy.
Add leak sensors and, if you can, an automatic shutoff. Sensors under sinks, behind toilets, by the water heater and washing machine, and in the basement give early warning. Automatic shutoff valves close the main line when a leak is detected. Some insurers give a discount, so read water leak sensors and shutoff valves: discounts and value and ask yours.
Fix grading and downspouts. The EPA recommends making sure the ground slopes away from the building foundation and cleaning and repairing roof gutters regularly (EPA, A Brief Guide to Mold, Moisture and Your Home). Triple-I adds that downspouts should direct water away from the house.
If you have a sump pump, add a battery backup. A sump pump is not covered for backup or overflow under the standard HO-3, and the equipment fails in storms when the power does. See sump pump failure and basement flooding.
Install a backwater valve if your area has sewer backup problems. Triple-I recommends a backwater valve, which lets sewage out but keeps it from coming back in.
Insulate exposed pipes. IBHS advises insulating pipes in attics, crawl spaces and exterior walls, and wrapping or taping pipes in unheated or minimally heated areas (IBHS, Winter Weather Ready, Nov. 14, 2024).
Buy the endorsements that match your gaps. Prevention cannot replace water backup coverage or service line coverage. Compare what your policy lacks in water backup and sewer backup coverage and service line coverage for water, sewer and power lines.

Seasonal checklist

When	Task	What it prevents
Spring	Check the roof for missing, cracked or lifted shingles, and check flashing around vents, chimneys and skylights	Roof leaks; see is a roof leak covered by homeowners insurance?
Spring	Test the sump pump by pouring water into the pit	Basement flooding
Spring and fall	Clear gutters and downspouts; look for sagging or pulled-away sections	Water running behind fascia and down walls
Summer	Check the air conditioner condensate drain and drip pan; clean the drain line	Ceiling and attic damage
Fall	Disconnect hoses; shut off and drain outdoor faucets if they are not frost-free	Burst spigot lines
Fall	Seal gaps where pipes enter walls; check attic insulation	Frozen pipes and ice dams; see ice dams and roof damage
Winter	Keep the thermostat at 55°F or higher, even when you are away	Frozen pipes
Winter	Clear snow away from foundation walls and vents; use a roof rake from the ground only if you must	Meltwater entering the house

Monthly checks

Look under sinks, behind toilets and around the water heater and washing machine. Check for dampness, rust, mineral crust and soft cabinet floors. Small drips are what turn into months-long leaks.
Look at ceilings and walls. New stains, bubbled paint or musty smells are the first sign of a hidden leak.
Check humidity. The EPA recommends keeping indoor relative humidity below 60 percent, ideally between 30 and 50 percent, and says a humidity meter costs about $10 to $50. Run bathroom fans while showering and kitchen exhaust fans while cooking.
Run the meter test. EPA WaterSense says to read your water meter, avoid using water for two hours, and read it again: "If the meter changes at all, you probably have a leak." It also suggests the toilet dye test, where color in the bowl after 10 minutes means a leaking flapper (EPA WaterSense, Fix a Leak Week, updated March 2026). A silent supply-line leak in a wall or slab often shows up first on the meter.

Appliances and the water heater

Appliances cause a large share of interior water claims, and most are preventable. Never leave home while the washer or dishwasher is running, and shut off the washing machine's water when you are away, as Triple-I advises. Check the water heater's connections, tank and discharge pipe for corrosion and drips, and know its age; a unit that has outlived its warranty is a reasonable candidate for replacement before it fails. A drain pan with a line to a floor drain limits damage from a slow leak. washing machine, water heater and dishwasher leaks explains how these claims are paid and why the failed hose is never part of the payment.

Before you leave home

For a trip of a few days, turn off the washing machine supply valves and leave the heat on. For a longer absence, IBHS suggests that if you will be away more than a week and subfreezing temperatures are occurring or forecast, you close the main valve slowly and let a couple of faucets drain on the lowest floor. A seasonal or second home needs a fuller plan; see snowbirds and seasonal homes: vacancy, freeze and theft for vacancy and freeze conditions and ask your agent about unoccupancy limits. Get a trusted neighbor or property manager to check the house during cold snaps, and give them the shutoff location.

Keep records that help a claim

Adjusters look closely at two things on a water claim: the cause, and the condition of the house before the loss. Take dated photos of the plumbing, water heater, appliances and roof once a year. Save receipts for hose replacements, roof repairs and plumbing work. A current home inventory shortens the contents part of any claim. Keep the manuals and the age of major appliances. If a leak happens, those records show a house that was maintained, and home maintenance that keeps you insurable explains how maintenance affects insurability.

What to do when prevention fails

Shut off the water first. Then photograph, call your insurer and begin drying within 24 to 48 hours, the window the EPA cites for preventing mold growth. reasonable repairs: what you can fix before the adjuster comes and the home insurance claim checklist walk through the order of operations.

Key takeaways

Know where the main shutoff is, test it, and consider a leak sensor system with automatic shutoff; some insurers discount for it.
Replace supply hoses every five to seven years, and never run the washer or dishwasher while away.
Clear gutters, extend downspouts and keep the ground sloping away from the foundation.
Keep the heat at 55°F or higher in winter and shut the water off and drain the lowest faucets for long absences.
Keep dated photos and receipts of maintenance; they support a claim and answer an insurer's questions about condition.

Terms used in this guide

Wear and tear The slow breakdown of materials from age, weather and ordinary use, which homeowners policies exclude because insurance pays for sudden loss, not upkeep. Neglect Failure to use all reasonable means to save and protect property at and after the time of a loss, which the policy excludes to the extent the damage grows. Water backup coverage An optional add-on that pays for damage when water or sewage comes up through drains or sewers, or when a sump pump fails or overflows. Mitigation credit A premium discount for building features shown to reduce storm or wildfire damage, such as a reinforced roof, impact windows or defensible space. Gradual damage Harm that builds up over weeks, months or years, such as a slow leak, rot or corrosion, which most homeowners policies exclude. Protective device discount A premium credit for installing safety equipment such as monitored burglar or fire alarms, sprinklers, smoke detectors, deadbolts or water-leak shutoffs.

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