Frozen pipes and winter property protection
A burst pipe is the most expensive routine claim in residential lettings, and almost all of them are preventable. The three ingredients are cold, a poorly insulated run of pipework, and heating that h
5 min read · Updated 22 August 2026
Overview
A burst pipe is the most expensive routine claim in residential lettings, and almost all of them are preventable. The three ingredients are cold, a poorly insulated run of pipework, and heating that has been turned off, usually because the property is empty or the tenant is economising.
Why it matters
Most policies exclude escape of water in an unoccupied property where heating and drain down conditions were not met.
Legal requirements
- Landlords must keep water and heating installations in repair.
- Insurance conditions on unoccupied periods form part of your contract and must be met.
- A property left without heat that causes damage to a neighbouring flat can create liability.
- Tenants have a duty to take reasonable care, including reporting faults promptly.
Common mistakes
- Switching the heating off entirely during a void.
- Not knowing where the stopcock is or whether it turns.
- Leaving loft pipework and tanks uninsulated while insulating the loft floor.
- Missing the unoccupancy limit in the policy, often thirty or forty five days.
Practical guidance
- Set voids to a background temperature rather than off, or drain the system down.
- Insulate loft pipework, tanks and any external runs.
- Show tenants the stopcock at check in and mark it clearly.
- Diarise the policy unoccupancy limit whenever a property falls empty.
Void season checklist
Before a winter void, service the boiler, set a frost protection temperature, insulate exposed pipework, clear gutters so overflow does not saturate walls, and arrange weekly inspections if your policy requires them. Record each inspection with a dated photograph. If the void will exceed the policy limit, either drain down properly or notify your insurer and accept the amended terms.
What to tell tenants
A short winter note works: keep the heating on low when away, leave the loft hatch ajar during a hard freeze, report any loss of heating the same day, and here is where the stopcock is. Tenants generally act on clear practical advice, and one avoided burst pays for a decade of sending the note.
Frequently asked questions
What temperature should an empty property be kept at?
Around twelve to fifteen degrees is the usual guidance, and check your policy wording.
Who pays if a tenant turns the heating off and pipes burst?
Your insurance is likely to respond, but the tenant may be liable for damage caused by a clear failure to take reasonable care.
Should I drain the system for long voids?
Yes for anything beyond the policy unoccupancy limit, and have it done properly rather than partially.
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This guide is general information for UK landlords and letting agents, not legal advice. Rules differ across England, Wales, Scotland and Northern Ireland — check your local requirements or take advice before acting.