Homeowners insurance and bathroom water damage in Ohio
A leaking shower raises two questions at once: what it will take to fix, and whether a homeowners policy will pay for any of it. This page sets out what the standard homeowners form says about water from plumbing, slow leaks, rot, mold and sewer backup, the time limits some companies' policies add, how often water claims happen nationally, and what the Ohio Department of Insurance tells homeowners, quoted from the form and the regulators. What any one policy covers is in its own wording.
Last updated September 2026 · Quoted from the standard form as state regulators publish it, the Ohio Department of Insurance and the Insurance Information Institute, each read September 25, 2026 · No prices on this page; the Estimate Builder carries those · Part of the knowledge base
The form most homeowners policies follow
The Ohio Department of Insurance's homeowners guide calls the HO-3 "the most common homeowners policy today" and says it lists the perils it does not cover rather than the ones it does. The standard HO-3 form is written by ISO, a national advisory organization whose forms insurance companies may file and use; the Ohio guide adds that each company prepares its own contract, though most are similar. What follows is what that standard form says about water, as state regulators publish it. A particular policy says what it says, with its own endorsements, and this page cannot say what any one policy covers.
| Subject | What the form says | Where in the form |
|---|---|---|
| Water from plumbing or an appliance | Loss from an "accidental discharge or overflow of water or steam" from within a plumbing, heating or air conditioning system or a household appliance is covered, including tearing out and replacing part of the building when needed to repair the system | The exception to the wear and tear exclusion, Coverage A and B |
| The pipe or appliance itself | Loss to the system or appliance from which the water or steam escaped is not covered | The same exception |
| Wear, deterioration and rot | "Wear and tear, marring, deterioration" and "Smog, rust or other corrosion, or dry rot" are not covered | Coverage A and B, what is not insured |
| Mold, fungus or wet rot | Not covered, except when hidden within walls, ceilings or floors and caused by an accidental discharge from plumbing, heating, air conditioning or an appliance | Coverage A and B, what is not insured |
| Sewer and drain backup | Water that "backs up through sewers or drains", or overflows from a sump or sump pump, is excluded | Section I exclusions, Water |
| Neglect | Loss from failing "to use all reasonable means to save and preserve property at and after the time of a loss" is excluded | Section I exclusions, Neglect |
So the form's line runs between water that escapes by accident from a system, which it covers along with the tear-out needed to fix the system, and wear, deterioration and dry rot, which it does not. Hidden mold is carved back in when an accidental plumbing or appliance leak caused it. The word "sudden" does not appear in the form's plumbing clause; the phrase "sudden and accidental" that is often used to describe it comes from plain-language summaries and from some companies' own policies.
The clock on a slow leak
Some company policies go further and exclude a leak that went on over a stated period, and the period is not the same everywhere. The national ISO base form itself sets no period, but a state's amendatory endorsement to the ISO form can add one: in Texas, the Texas Department of Insurance lists companies using ISO forms under the weeks, months or years wording. State regulators have published several versions from companies' policies, and they differ both in the clock and in whether a hidden leak is excused.
| Wording on the period of the leak | Where it was published | Hidden leaks |
|---|---|---|
| "Over a period of 14 or more days" | Company policies quoted by the Texas Department of Insurance, 2018 | Not stated in the quoted wording |
| "Over a period of weeks, months, or years" | Policies on ISO forms in Texas and one named company, as quoted by the Texas Department of Insurance, 2018; a company form published by the Oklahoma Insurance Department | The Oklahoma form excuses a leak unknown to every insured and hidden in walls, ceilings or floors |
| "Over a period of time and results in deterioration" | Company policies quoted by the Texas Department of Insurance, 2018 | Not stated in the quoted wording |
| "Over a period of 14 days or more" | A company endorsement published by the Nevada Division of Insurance | "Whether hidden or not" |
| No time period | The standard ISO homeowners form, editions of 1991, 2000 and 2011 as published by the Nevada Division of Insurance and the Maine Bureau of Insurance | No seepage clause; it excludes wear and tear, deterioration, dry rot and most mold and wet rot, and covers the resulting damage from an accidental discharge from plumbing without saying how long it ran |
No Ohio source was found that publishes a homeowners policy form or says which of these versions Ohio companies use, so this page does not say which is common in Ohio. The words to look for in a policy are in its list of perils insured against, its water exclusion, any wording on mold or fungi, any seepage or leakage clause and its period, and any endorsement added for water backup.
Sewer backup is its own endorsement
The Ohio Department of Insurance lists water damage from a sewer backup or a basement leak among the typical exclusions of a homeowners policy, and its severe weather toolkit says coverage for sewer drain backup "is not included or is limited in a typical policy and must be added." Flood is not in a standard policy at all and is bought separately, through the federal flood insurance program, whose policies private insurance companies may sell. Who is responsible for the pipe from the house to the public sewer, and the cities' backup prevention programs, are on the page on sewer laterals and basement backup rules by town; flood claims in Central Ohio are on the page on flood insurance claims by ZIP code.
How often water claims happen
The Insurance Information Institute, an organization funded by insurers, publishes claim frequency from ISO's data. Averaged over 2019 to 2023, water damage and freezing came to 1.50 claims for every 100 insured homes a year, second only to wind and hail, and about 27 percent of all property damage claims by count, a share worked out here from its table. The category includes frozen pipes and, where covered, mold, not only bathroom leaks, and the figures leave out Alaska, Texas and Puerto Rico. The Ohio Department of Insurance publishes no count of water claims or claims by cause; its 2025 annual report says claim denial and claim delay were the top reasons for consumer complaints, and that the coverage types most complained about were health insurance and homeowners insurance.
| Cause of loss | Claims per 100 insured homes a year |
|---|---|
| Wind and hail | 2.80 |
| Water damage and freezing | 1.50 |
| All other causes, including vandalism | 0.88 |
| Fire and lightning | 0.23 |
| Theft | 0.12 |
| All property damage | 5.53 |
What the Ohio Department of Insurance tells homeowners
The department's March 2026 release for Fix a Leak Week tells homeowners to review "the limits, provisions, exclusions, and endorsements that may apply to the terms of water loss coverage" with an agent, and gives a meter test for a hidden leak: read the water meter before and after two hours when no water is used, and if it changes at all, there may be a leak. After a loss, its guide says to notify the agent or company immediately, make temporary repairs to prevent more damage and keep the receipts, and keep the damaged property until the company says in writing that it may be discarded. A complaint goes to the department's Consumer Services Division, which investigates written complaints but, in its own words, cannot settle factual disputes such as the value of damaged property. The same guide lists poor home maintenance among typical exclusions, tells homeowners to review the policy first, and warns that two to three claims within five years may lead a company to cancel or not renew a policy.
Scope, plainly. This page quotes the standard form and the regulators; it is not advice on any policy. The company's own leak-free guarantee is a separate promise about its own work and is not insurance. What mold needs and when it grows is on the page on bathroom humidity and mold by month.
The short version. The standard ISO homeowners form covers water that escapes by accident from plumbing or an appliance, and the tear-out needed to repair the system, but not the leaking pipe itself, wear, deterioration, dry rot, most mold or sewer backup. Some company policies also exclude a leak that went on for a stated period, and regulators have published versions of 14 days, of weeks, months or years, and with no fixed period, some excusing hidden leaks and some not. Water damage and freezing run about 1.5 claims per 100 insured homes a year nationally. What one policy covers is in its own wording.
Sources
Every figure, date and quotation on this page comes from one of these documents, read on the date given. Where two of them disagree, the page says so.
- Ohio Department of Insurance, Homeowners Insurance Guide, the Severe Weather Toolkit and the Fix a Leak Week 2026 release, March 16, 2026, and Flood Insurance Information; read September 25, 2026.
- Ohio Department of Insurance, Annual Report 2025, Consumer Services; read September 25, 2026.
- Insurance Services Office, Homeowners 3 Special Form HO 00 03 05 11, as published by the Maine Bureau of Insurance, and editions HO 00 03 04 91 and HO 00 03 10 00 as published by the Nevada Division of Insurance; read September 25, 2026.
- Texas Department of Insurance, Texas Homeowners Policies, April 12, 2018; Oklahoma Insurance Department, company homeowners form HS 00 03 OK 10 14; Nevada Division of Insurance, company seepage exclusion endorsement FMHO 3391 11 12; read September 25, 2026.
- Insurance Information Institute, an insurer-funded organization, Facts and Statistics: Homeowners and Renters Insurance, table Average Homeowners Losses, 2019 to 2023, from ISO data; read September 25, 2026.
Common questions
Does homeowners insurance in Ohio cover a leaking shower?
It depends on the policy's own wording. The standard ISO homeowners form covers loss from an accidental discharge or overflow of water from within a plumbing system or a household appliance, including tearing out part of the building to repair the system, but not the leaking pipe or fixture itself, and not wear and tear, deterioration or dry rot. The form does not say whether water getting past worn grout, caulk or a shower pan counts as a discharge from the plumbing system; that is for the company to decide under the policy's wording. Some company policies also exclude a leak that went on over a stated period.
Is a 14-day leak exclusion standard in homeowners insurance?
Not in the national ISO base form, which sets no period, though a state endorsement to it or a company's own form can add one. Some company policies do: state regulators have published versions excluding seepage over 14 or more days, over weeks, months or years, and over a period of time that results in deterioration, and they differ on whether a hidden leak is excused. No Ohio source says which version Ohio companies use.
Is mold or a rotted floor under a bathroom covered by homeowners insurance?
Under the standard ISO homeowners form, deterioration and dry rot are not covered, and mold, fungus or wet rot is not covered except when it is hidden within walls, ceilings or floors and was caused by an accidental discharge from plumbing, heating, air conditioning or an appliance. A given policy may differ, so its own wording decides.
Does a standard homeowners policy in Ohio include sewer backup coverage?
Generally not. The Ohio Department of Insurance lists water damage from a sewer backup or basement leak among typical homeowners exclusions, and says coverage for sewer drain backup is not included or is limited in a typical policy and must be added; its guide says added coverage comes by endorsement.
How common are water damage claims on homeowners insurance?
The Insurance Information Institute, an insurer-funded organization, reports from ISO data that water damage and freezing averaged 1.50 claims per 100 insured homes a year from 2019 to 2023, second only to wind and hail, about 27 percent of property damage claims by count. The category includes frozen pipes and mold, and the figures leave out Alaska, Texas and Puerto Rico.
What does the Ohio Department of Insurance say to do after water damage?
Its homeowners guide says to notify the agent or company immediately, make temporary repairs to protect the property from more damage and keep the receipts, keep the damaged property until the company says in writing it may be discarded, and cooperate with the adjuster. Complaints go to its Consumer Services Division, which cannot settle factual disputes such as the value of damaged property.
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