Does my standard buildings insurance cover flood damage?

In many markets, standard buildings policies exclude flood damage or restrict it to sudden, accidental escape of water — not rising groundwater or overflowing rivers. In the UK, the Flood Re scheme allows insurers to offer affordable flood cover in high-risk areas. In the US, the National Flood Insurance Program (NFIP) provides federally backed flood cover that must be purchased separately. Always check the water damage section of your policy exclusions for the specific wording.

What is the difference between storm damage and flood damage in insurance?

Insurers generally define storm damage as physical damage caused by the force of wind, hail, lightning, or heavy rain directly striking the property — for example, a roof damaged by high winds. Flood damage refers to water entering the property from an external source such as a river overflow, surface water runoff, or groundwater rising. The distinction matters because most policies cover the first and exclude the second without an add-on or separate policy.

How do I find out if my property is in a flood-risk area?

In the UK, the Environment Agency flood risk checker shows your property's long-term flood risk. In the US, the FEMA Flood Map Service Center provides official flood zone maps. In Australia, the FloodSafe website links to state-level mapping resources. Knowing your risk is the first step to finding appropriate cover.

Can I add flood cover to an existing home policy mid-term?

Many insurers allow cover upgrades mid-term, but a flood cover extension typically includes a waiting period — commonly 14 to 30 days — before it takes effect. You cannot add flood cover after a flood warning has already been issued for your area. Review your options well ahead of seasonal risk periods rather than waiting until a weather event is imminent.

Consumer alert All regions Published 2026-10-17 7 min read

Flood and storm cover: what home insurance typically includes and excludes

Storm damage is usually covered by standard home policies; flood damage often is not. This article explains the distinction, why it matters in regions facing increasing weather events, and what to check before the next storm season.

Why storm and flood cover are different

The terms "storm" and "flood" appear in almost every home insurance policy, yet most policyholders assume they mean the same thing. They do not, and the distinction can be the difference between a fully paid claim and no payment at all.

Standard home and buildings policies generally cover sudden, physical damage caused by the force of a storm — wind, hail, lightning, and direct rain impact. They do not automatically cover water entering the property from outside as a result of flooding.

Typically included

Roof tiles dislodged by wind
Windows broken by hail
Gutters and fascias torn off
Lightning strike damage
Fallen trees onto the structure

Often excluded without add-on

Rising groundwater entering basement
River overflow through ground floor
Surface water runoff through doors
Sewer or drain overflow (often separate)
Coastal storm surge

Check the water damage and flood sections of your policy's exclusions carefully. Look for the specific definition of "flood" in your policy schedule — it determines which events are covered.

How flood cover works in different markets

Because flood risk is geographically concentrated, private insurers in high-risk areas often price cover out of reach or decline to offer it. Most major markets have created schemes to address this:

UK — Flood Re: A reinsurance pool that lets insurers offer affordable flood cover to homes built before 2009 in high-risk postcodes. Homes built after 2009 are excluded from the scheme (they were required to be built with flood resilience). Check whether your insurer participates via the Flood Re website.
US — NFIP: The National Flood Insurance Program is a federal scheme sold through private agents. It covers up to $250,000 for building damage and $100,000 for contents. Private flood insurance is also available and may offer higher limits.
Australia: Flood cover was historically inconsistent, but the APRA and the Insurance Council of Australia introduced a standard flood definition in 2012 to reduce disputes. Most comprehensive home policies now include flood; check whether yours does and what the definition covers.

What to check at your next renewal

Check whether flood cover is included or excluded — it may be listed as an optional extension you have not activated.
Confirm the definition of "flood" in your policy — specifically whether surface water, groundwater, and sewer overflow are included.
Check your flood risk using your national flood mapping tool — risk can change after new development or land-use changes nearby.
Review your policy limit against the cost of replacing all affected contents — flood events cause total losses more often than fire or theft.
Ask your insurer about a flood-specific excess — these are often higher than the standard excess and are set separately.

For a broader review of what your home policy covers and excludes, see our guide to policy exclusions and the article on rebuild costs and under-insurance.

Flood and storm FAQ

Frequently asked questions

: In many markets, standard buildings policies exclude flood damage or restrict it to sudden, accidental escape of water — not rising groundwater or overflowing rivers. In the UK, the Flood Re scheme allows insurers to offer affordable flood cover in high-risk areas. In the US, the National Flood Insurance Program (NFIP) provides federally backed flood cover that must be purchased separately. Always check the water damage section of your policy exclusions for the specific wording.
: Insurers generally define storm damage as physical damage caused by the force of wind, hail, lightning, or heavy rain directly striking the property — for example, a roof damaged by high winds. Flood damage refers to water entering the property from an external source such as a river overflow, surface water runoff, or groundwater rising. The distinction matters because most policies cover the first and exclude the second without an add-on or separate policy.
: In the UK, the Environment Agency flood risk checker shows your property's long-term flood risk. In the US, the FEMA Flood Map Service Center provides official flood zone maps. In Australia, the FloodSafe website links to state-level mapping resources. Knowing your risk is the first step to finding appropriate cover.
: Many insurers allow cover upgrades mid-term, but a flood cover extension typically includes a waiting period — commonly 14 to 30 days — before it takes effect. You cannot add flood cover after a flood warning has already been issued for your area. Review your options well ahead of seasonal risk periods rather than waiting until a weather event is imminent.