How long can a property be void before insurance is voided?

Most standard UK buildings and landlord insurance policies restrict cover after 30, 45, or 60 continuous days of unoccupancy — the specific threshold is in your policy schedule. Beyond the threshold, the policy typically requires notification, may impose additional conditions (drain-down, weekly inspections, heating on a timer), and some perils (escape of water, malicious damage, theft) are either excluded or require specific dedicated unoccupied-property cover. Never assume cover continues — notify the insurer as soon as the property goes void.

Do I really need to drain the pipes in a void property?

It depends on how long the void will last and whether you'll keep heating on. For voids under 30 days with the thermostat at 8°C minimum and well-lagged pipes, leaving the system live is usually fine. For longer voids, or if you won't keep heating on (e.g. no gas account, boiler out of service), drain-down is the safer option. The rule of thumb: no heating on + under-insulated loft = drain-down mandatory. Heating on + well-lagged pipes + regular inspections = leave live. Insurance policies may mandate drain-down beyond specific thresholds — check the schedule.

What thermostat setting is safe for a void property in London?

8°C is the widely-recommended minimum for a void property with live plumbing. The boiler's frost-protect setting (typically 5°C) is borderline — it prevents pipes freezing in average conditions but is insufficient during prolonged cold snaps of -3°C or colder, which London sees most winters. Set the thermostat at 8–10°C with the heating on 24/7 during temperatures below 5°C, or on a twice-daily cycle (3–4 hours morning, 3–4 hours evening) to warm the fabric of the building. Don't rely on frost-protect alone in January or February.

Who pays if a void property floods during winter?

If the insurer accepts the claim: they pay, subject to excess (£250–£1,000 for escape of water) and policy limits. If the insurer rejects because winterisation was inadequate or the property was void beyond the policy's unoccupancy threshold without notification, the landlord pays. If the flood damages a neighbouring property (common in London flats), the neighbour's insurer pays them and then subrogates against the landlord for recovery. Uninsured flood damage plus subrogation claims can exceed £25,000 for a ceiling-collapse event into a lower flat.

Is the frost-setting on my boiler enough protection?

Not on its own. Boiler frost-protection only runs the circulation pump and fires the boiler when water temperature drops below the set point (usually 5°C). If a radiator is broken, a pipe has air locked in, or the circulation pump fails, the protection breaks and pipes can freeze anyway. Frost-protect also doesn't help pipes in the loft or exterior that aren't in the circulation loop — those need separate lagging. Use frost-protect as a backup to a 8°C thermostat setting, not a primary protection.

How often should I check a void property in winter?

Weekly as a minimum, more often during cold snaps. Most insurance policies require at least fortnightly inspections with a written log — check the schedule. Inspections cover: heating is on and thermostat at set point, no water stains or dripping, all windows closed, no post blocking mail slots, no signs of forced entry, gutters clear, no unusual smells. Document each inspection in a log (paper or digital) with date, time, and any issues noted. During cold snaps below -2°C, inspect every 2–3 days.

Can a letting agent handle void winterisation on my behalf?

Yes, and most London letting agents offer void property management as a paid add-on service. Fees run £40–£100 per inspection visit plus the cost of any works. Confirm in writing who is responsible for each element (drain-down, heating settings, stopcock test, insurance notification). The landlord remains the duty-holder for the property — delegating to an agent doesn't transfer the legal responsibility to the agent. Keep copies of the agent's inspection reports for insurance evidence.

What about summer void periods — do I still need to winterise?

Full winterisation isn't needed in summer, but several checks still apply for any void. Turn off the washing machine and dishwasher supply valves, ensure the stopcock is accessible and tested, check for drips and small leaks that could become floods over weeks unattended, keep the property secure, and notify the insurer about unoccupancy beyond the policy threshold. Summer voids carry lower freeze risk but similar claim rejection risks if a long-term leak is discovered after move-in.

Winterising a Void Property in London: A Landlord's Checklist to Prevent Frozen Pipes and Insurance Disputes

Void property checklist for London landlords: drain-down, heating schedules, insurance requirements, and what happens if you don't bother. Zero-call-out-fee scheduled visits.

A void property in January is the most dangerous thing in a London landlord's portfolio. No tenant heating patterns, no hot water being drawn, no one to hear a dripping ceiling. Two days of -3°C with an unlagged loft pipe and the cost ranges from £1,500 for a quick catch to £25,000 for a collapsed ceiling into the flat below — plus an insurance claim that may not pay out if winterisation was skipped. This checklist is built from 14 years of attending post-freeze jobs across London and watching the same preventable failures repeat every winter.

For scheduled winterisation visits on a void property, contact us on 07456 975436. Landlords on our priority list receive zero call-out fees on scheduled void visits.

Why Void Properties Freeze First

Empty London rental property being winterised by a landlord to prevent frozen pipes during a void period

The statistics are unequivocal: a void property freezes at higher rates than a tenanted one, often during the same cold snap, in the same building. Four factors drive it.

1. No Tenant Heating Pattern

A lived-in flat has heating cycles that pump warm water through radiators every few hours — morning shower, evening cooking, late-night heating comfort call. Each cycle warms the pipe runs through the building's coldest cavities: behind dot-and-dab plasterboard, through loft voids, across external walls. A void property with heating on a low fixed setting lacks these pulses. Even if the thermostat holds at 8°C, pipes in poorly insulated cavities can drop below zero in a -5°C external reading because they're not being actively warmed by hot water movement.

2. No Hot Water Draw

A tenant taking a shower pulls warm water through the cold feed and out through the hot — every shower effectively flushes the cold-water system with water that has been indoors at above freezing. An unoccupied property has no draw. Water sits static in the pipes. Static water in a pipe near an external wall cools faster than moving water from a tenant's morning shower.

3. Cold Draughts and Uninsulated Lofts

Period London properties have lofts that were insulated twenty years ago to 100mm, below current standards of 270mm. Cold-water tanks and pipe runs sit in these undersinsulated spaces. A lived-in property warms the loft floor from below through escaping house heat; a void property with heating on minimum does not. Loft temperatures in a void London house in January can sit below zero for days even when the external is only -2°C.

4. Dripping Taps Waste Heat

A single dripping tap in a void property pulls cold mains water through the system continuously. Over 48 hours of freezing weather this converts the property into a one-way heat loss through the drain. Small issues that would be noticed and fixed by a tenant in days (a running toilet, a dripping kitchen tap) become significant heat drains in a void.

Insurance Implications of Void and Unoccupied Status

Landlord insurance policies treat occupancy as a material condition. The policy language matters and landlords often discover it only after a claim is rejected.

The Standard Unoccupancy Clause

Most buildings and landlord policies state that if the property is "unoccupied" or "void" for more than a specified continuous period — commonly 30, 45, or 60 days — the policyholder must notify the insurer. The notification typically triggers one or more of:

Additional premium loading (5–25%)
Increased excess on escape-of-water claims (often £1,000+)
Specific requirements: drain-down, heating on minimum schedule, weekly inspections with log
Exclusion of certain perils — most commonly escape of water, malicious damage, and theft
A cap on the unoccupancy period beyond which cover lapses entirely (90–180 days typical)

Failing to notify the insurer is the biggest single cause of rejected claims on void properties. The insurer argues the risk they underwrote (a tenanted property) is materially different from the risk that caused the loss (a void property with no heating or inspections). Courts consistently uphold this position where the policy wording is clear and the policyholder didn't disclose.

"Unoccupied" vs "Void" vs "Vacant"

These terms are used interchangeably in marketing but have specific meanings in policy wording.

Unoccupied: Nobody is living in the property even if it's furnished and being marketed. Most insurers' threshold for this status is 30 days continuous.
Void: Property is between tenancies and actively being marketed, typically furnished or partly furnished. Same unoccupancy clock.
Vacant: Property is empty, unfurnished, and not being actively offered. Higher risk category; most insurers exclude or require specialist cover beyond 30 days.

Read your policy. The distinction affects what cover applies.

⚠️ The notification-failure trap: A tenant moves out on 1 December. The next tenant was supposed to move in on 15 December but pulls out. By the time a new let is agreed it's 20 January — 50 days of continuous unoccupancy. If there's a freeze event on 15 January and the landlord never notified the insurer of the extended void, the claim is routinely rejected. Notify early. It costs nothing.

The 15-Item Winterisation Checklist

Plumber checking stopcock location and testing operation in a void London property during winterisation

This is the full checklist we work through on void winterisation visits. Half-measures fail in cold snaps. Each item takes minutes to complete; skipping any of them is a gamble.

1. Drain Down the Cold Water System (If Heating Will Be Off)

Close the main stopcock. Open all cold taps starting from the highest point (top-floor basin or bath) and work downwards. Flush the toilet repeatedly until the cistern is empty. Open the drain-off valve at the lowest point (usually near the stopcock or outside tap). Once drained, leave taps open to prevent any residual water pooling. For storage tanks in the loft, close the inlet stop valve and drain the tank via its drain-off valve. This takes 30–45 minutes and removes the freeze risk entirely.

2. Insulate Loft Pipes and Tanks

All pipes in the loft void must be lagged with minimum 19mm-thick foam insulation (Class O rated); 25mm or 32mm is better for pipes against the roof underside. Storage tanks need a purpose-made insulation jacket or fully wrapped in 100mm loft-standard insulation. Do not insulate directly under the cold tank — the floor of the tank should remain open to the loft floor's heat.

3. Set Heating to Frost Setting with Timing

Set the programmer to heat twice daily — 3–4 hours morning (6 am to 10 am), 3–4 hours evening (5 pm to 9 pm). This creates circulation pulses through the pipe runs. Set the thermostat to 8–10°C as a floor. During cold snaps of -3°C or colder, set to continuous heat at 10°C minimum.

4. Set Thermostat Backup to 8°C Minimum

If the boiler or programmer fails, the thermostat at 8°C is the last-line defence. Check the thermostat is calibrated — hold a separate thermometer against the wall near the thermostat and verify it reads accurately. Battery-powered wireless thermostats should have fresh batteries; a flat battery in December is a guaranteed freeze.

5. Lag All External and Exposed Pipes

Any pipe outside the insulated building envelope — garage runs, outside tap supply, external condensate pipes from condensing boilers, pipes in cold porches — needs foam lagging. Condensate pipes are the biggest failure point in London winters: lag them in 25mm foam and upsize the pipe internal diameter to 32mm if possible (Part J upgrade). A frozen condensate pipe locks the boiler out, the boiler stops firing, and the property starts losing heat immediately.

6. Check Stopcock Location and Test Operation

Find the stopcock. In older London properties it may be under the kitchen sink, in a hall cupboard, or in a cellar/basement. Label it clearly for the next tenant. Test operation — a stopcock that hasn't been turned in five years may seize, which is a disaster during a burst. Turn off, run the kitchen cold tap until it stops, turn back on, confirm flow returns. If the stopcock is seized or leaks, replace it before the property goes void.

7. Drain and Disconnect Outside Taps

Close the internal isolation valve feeding each outside tap. Open the tap itself and let it drain completely. Detach any hose and coil it indoors. External taps without an internal isolation valve should be replaced with frost-proof taps — they're £25–£60 for the tap plus fitting.

8. Inspect and Clear Gutters

Blocked gutters overflow, drench external walls, and create conditions where internal pipe runs against external walls are more exposed to cold-damp. They also contribute to ice dams on roof edges that can force water up under tiles. Clear leaves, check downpipes are running freely.

9. Test the Heating System Including Radiator Bleed

Run the heating on a full cycle. Walk every radiator with a hand — the tops should be as hot as the bottoms. Cold tops mean air locked in the radiator; bleed it with a radiator key. Cold bottoms mean sludge and need a power flush (not urgent for winterisation but flag for later). A radiator with airlock effectively breaks the circulation loop at that point; the pipe from the radiator to the next one becomes stagnant and vulnerable.

10. Check Water Heater and Unvented Cylinder

For unvented systems, set to "holiday mode" per the manufacturer manual. This typically drops the stored water temperature to around 40°C — still warm enough to limit legionella risk but avoiding the wasteful full-temperature 60°C. Confirm the expansion vessel pressure is correct (pre-charge typically 3.5 bar on unvented) and the T&P relief valve discharge pipe is not obstructed.

11. Drain Washing Machine and Dishwasher Hoses

Turn off the isolation valves at the rear of each appliance. Disconnect the fill hoses and drain any residual water into a bucket. Reattach loosely. Water trapped in fill hoses against external walls is a classic freeze failure — the hose bursts, fills the property at mains pressure the next time someone turns the isolation valve on.

12. Remove Water-Based Features

Water features, decorative fountains, fish tanks (rehomed), any plant that requires regular watering. These won't be tended during void and become either freeze risks or dead biomass that smells when the next tenant arrives.

13. Check Loft Hatch Insulation

An uninsulated loft hatch is a cold bridge that drops loft temperatures by 2–3°C. Attach 50mm rigid insulation board to the upper side of the hatch and fit draught-proof strip around the frame. Cost: £20. Saves a loft-pipe freeze.

14. Notify a Neighbour or Local Contact

Give a trusted neighbour the landlord's or letting agent's contact number. "If you hear water running, see any damage, or notice anything odd, call this number." Neighbours often spot issues before an inspection schedule catches them. Provide stopcock location information in case of immediate emergency.

15. Notify Buildings Insurance of Void Status

The first and last item on every list. Call or email the insurer, confirm the property is void from a specific date, ask what conditions apply. Document the response in writing — either via email confirmation or a record of the call reference and agent name. This is the single most important piece of paper in the winterisation file.

💡 Timing matters: Complete this checklist in the first 48 hours of a property going void. Every day delayed in a December or January void is a day of accumulating risk. Schedule the visit as soon as the tenant's move-out is confirmed.

Portfolio-Scale Winterisation for Property Managers

Managing winterisation across a portfolio of 15, 50, or 200 properties requires systems, not just checklists.

Scheduling Software

A shared calendar or dedicated property management software (Arthur, Re-Leased, Fixflo) lets you track void start dates, scheduled winterisation visits, and inspection logs per property. Colour-coding by risk level (days since heating test, days since last inspection, insurance threshold countdown) keeps the higher-risk properties visible.

Standardised Checklist Sign-Off

Every void winterisation visit completes the same PDF or app-based checklist. The inspector signs off each item with a photo where relevant (thermostat showing 8°C, drain-off valve open, insulation visible). The completed checklist feeds directly into the insurance file for that property.

Weekly Portfolio Sweep

For property managers with multiple voids, batch weekly inspection visits by geography. A Tuesday morning of 8 void-property checks across north London saves massively on engineer time versus 8 separate bookings spread through the week. The checks themselves take 10–15 minutes per property once the engineer knows the layouts.

Insurance Coordination

Keep a master list of insurers and their specific void requirements. Some insurers want fortnightly inspections; others require weekly; a few require daily during cold snaps. The property manager — not the landlord — usually handles this notification in agent-managed portfolios.

Our property manager service bundles winterisation visits with portfolio PPM contracts to spread the cost across the year.

When the Property Goes Void in Winter Unexpectedly

London landlord closing the stopcock during emergency winterisation of an unexpectedly vacated rental property

The tenant gives notice on 10 December. They move out on 20 December. The next tenant is still finding feet — realistic move-in date 5 January. You now have 16 days of void over the coldest week of the year.

Priority Actions Within 24 Hours

Set the thermostat to 10°C, heating on twice-daily schedule
Test the stopcock (don't wait until you need it)
Drain outside taps, drain washing machine fill hose
Clear the letterbox of any accumulated post (deters opportunists)
Email the insurer: "Property is void from [date], expected tenancy [date]. Confirm cover and conditions."
Arrange weekly inspection — yourself, agent, or paid visit
If property is unheated or boiler is broken: drain the cold water system same day

Priority Actions Within 48 Hours

Full 15-item winterisation check
Insulation sanity check — pipe lagging, loft insulation, loft hatch
Neighbour contact card in hand
Stopcock location documented in the property file

If You're Abroad for Christmas

A common scenario. Engage a local contact — letting agent, family, trusted neighbour, or paid service — with the stopcock location and emergency plumber number before you leave. A voicemail from a neighbour at midnight on 27 December saying "water coming through the ceiling" is useful only if there's a contact able to attend within the hour. Our emergency plumber service responds 24/7 — see emergency plumber London for details.

London landlord inspecting a void rental property weekly during winter to prevent frozen pipes

Inspection Schedule During Void Periods

Frequency depends on three factors: policy requirements, temperature, and property risk profile.

Condition	Inspection Frequency	What to Check
Above 5°C, short void (under 14 days)	Weekly	Heating running, no leaks, post cleared, secure
Above 5°C, extended void (over 30 days)	Weekly	Full walkthrough, thermostat reading, radiator tops
0–5°C forecast	Every 4–5 days	Heating, all pipes warm, boiler firing, external lagging
Below 0°C (cold snap)	Every 2–3 days	Full checklist, condensate pipe, external taps, loft
Below -3°C (severe)	Daily	Everything — a single missed inspection is an expensive gamble
Void without heating	Twice-weekly minimum	Drain-down verified, no re-filling, no intrusion

What to Document

A proper inspection log includes: date and time, inspector name, external temperature, internal temperature at thermostat, boiler status, any smell or leak observed, photos of thermostat and any concerns. Dated photos are gold for an insurance claim — they prove compliance with the frequency requirement even if the policy demands "regular inspections" without specifying a schedule.

Cost of Professional Winterisation in London

DIY winterisation is fine for experienced landlords. For first-timers or portfolio managers covering multiple properties, a professional visit ensures nothing is missed.

Property Type	Initial Winterisation Cost	Weekly Inspection Cost	Notes
Studio or 1-bed flat	£80–£140	£35–£60	Combi boiler, few pipes, 45-min visit
2-bed flat	£100–£180	£40–£65	Usually combi boiler
3-bed terrace house	£150–£280	£45–£75	Loft pipes, possibly system boiler
4+ bed house	£250–£500	£55–£100	Multiple bathrooms, possibly outbuildings
Large house or unvented system	£500+	£70–£120	Unvented cylinder, multi-zone heating
HMO (5–6 bed)	£300–£600	£55–£90	Multiple en-suite bathrooms, shared kitchen
Commercial ground-floor shop	£250–£450	£55–£90	Rear storage, single WC, kitchenette

Landlords on our priority list receive scheduled winterisation visits with zero call-out fee — see landlord service for details. Portfolio rates apply for property managers handling 5+ voids simultaneously.

Common Mistakes and Real-World Flood Stories

Every January we attend 20–30 void-property floods across London. The patterns are depressingly consistent.

Mistake 1 — "I Thought Frost Protection Was Enough"

Kensington flat, 2024. Combi boiler set to frost-protect (5°C). External temperature dropped to -7°C for three consecutive nights. Boiler fired as designed, but the condensate pipe to the external drain froze. Boiler locked out on error. Property cooled. Loft pipe burst. Ceiling collapsed into the flat below. Repair to the landlord's property: £14,000. Subrogation claim from the neighbour's insurer: £18,500. Outcome: landlord was underinsured on liability and paid the balance personally. Total out of pocket: £7,200.

Mistake 2 — Stopcock Never Tested

Wandsworth terrace, 2023. Void for 45 days. Burst pipe in bathroom wall on a Saturday night. Emergency plumber attended within 90 minutes. Stopcock seized — hadn't been turned in seven years. Engineer had to cut the mains supply at the meter in the front garden using the water board's bypass. Additional 40 minutes of flooding. Extra damage from seized stopcock: £4,500.

Mistake 3 — Letting Agent Said "We Handle It"

Camden flat, 2024. Landlord abroad for Christmas, instructed agent to "keep an eye on it". Agent visited once on 20 December, ticked a form, didn't enter the property. Pipe burst 29 December. No inspection had caught the obvious drips that preceded the failure. Flood ran for 4 days. Ceiling, flooring, all redecoration needed. Total repair bill: £22,000. Insurance paid after a 6-month dispute; agent's professional indemnity covered the excess after legal action.

Mistake 4 — "It's Only Void for Two Weeks"

Battersea flat, 2022. Tenant moved out 15 December. New tenant due 1 January. Landlord didn't bother with winterisation — "only two weeks". Severe cold snap 22–26 December. Pipe burst 24 December. Emergency plumber attended Christmas Day — £450 out-of-hours call-out alone. Total damage £6,800 plus the premium repair cost. Insurance paid but excess was £500 plus £250 premium loading for claim history.

Mistake 5 — Heating Turned Off "To Save Money"

Hackney house, 2023. Owner-occupier went to visit family for a month. Turned the heating off entirely to save on gas. Pipes froze within a week. Ground floor fully flooded by the time a neighbour noticed. Repair bill: £19,500. Insurance refused on the grounds of "not taking reasonable steps" — heating being turned off entirely in December without drain-down. Appealed to Financial Ombudsman; partial settlement of £8,000 awarded.

⚠️ The common thread: every one of these cases would have been avoided by the 15-item checklist costing £80–£250 upfront. Winterisation is the cheapest insurance you can buy.

Drain-Down and Return to Service (When the New Tenant Arrives)

Reversing winterisation is not optional — a drained property cannot simply have the water turned back on with the new tenant waiting at the door.

Return-to-Service Checklist

Close all taps and drain-off valves. Every tap opened during drain-down needs closing. Miss one on the top floor and the first tenant experience is a ceiling leak.
Close all toilet drain-offs and restore cistern function.
Slowly open the main stopcock. Partial turn first — listen for rushing water, check for visible leaks. Full open only once the system is at pressure without issue.
Open taps one by one starting from the lowest. Run until water flows clear and air has purged. Work upwards through the property.
Bleed radiators and check pressure. Restoring a drained system introduces air throughout. Bleed every radiator, top up system pressure if needed.
Test the hot water system. On combi: run hot tap, confirm temperature rises. On unvented: reset holiday mode, allow 30–45 minutes to reheat, test.
Flush all outlets for 5 minutes. This addresses legionella risk from static water — particularly important for any HMO or licensed premises.
Check for leaks 24 hours after full pressurisation. Small joint failures caused by thermal stress during winterisation can take hours to manifest.
Record the return-to-service completion. Date, engineer, any issues, for the property file.

This takes 60–120 minutes depending on property size. Budget a half-day for the engineer to do it properly and catch the leaks that do appear. Do not schedule return-to-service on the morning of a tenant move-in — build in a 24-hour buffer.

When to Call Emergency Repairs London

Void Property Winterisation Across London — Scheduled Visits, Zero Call-Out Fees for Priority Landlords

15-item winterisation checklists, weekly inspection services, emergency response 24/7 across every London borough. Scheduled work for landlords and property managers carries no call-out fee when booked in advance.

Call 07456 975436 Now

Related: our frozen pipes in London guide covers thawing and emergency response, the burst pipe in a rental property landlord guide handles the response after a freeze, and our priority landlord service explains the zero-call-out-fee arrangement. For services see emergency plumber London, burst pipe repair, pricing, and contact us.

Frequently Asked Questions

How long can a property be void before insurance voids?

Most UK buildings and landlord policies restrict cover after 30, 45, or 60 continuous days of unoccupancy. Beyond the threshold, the policy typically requires notification and may impose additional conditions or exclude specific perils (escape of water, malicious damage, theft). Never assume cover continues — notify the insurer as soon as the property goes void.

Do I really need to drain the pipes?

It depends on the void length and whether heating is on. Under 30 days with thermostat at 8°C and lagged pipes: leaving live is usually fine. Longer voids, or no heating on, favour drain-down. Insurance policies may mandate drain-down beyond specific thresholds — check the schedule.

What thermostat setting is safe?

8°C is the widely-recommended minimum. Frost-protect (5°C) is borderline — insufficient during prolonged cold below -3°C which London sees most winters. Set to 8–10°C with heating on 24/7 during sub-5°C weather, or twice-daily cycles warming the fabric. Don't rely on frost-protect alone in January or February.

Who pays if a void property floods?

If the insurer accepts the claim: they pay subject to excess (£250–£1,000 for escape of water). If rejected for inadequate winterisation or notification failure: the landlord pays. Damage to neighbouring properties: the neighbour's insurer pays them then subrogates against the landlord. Uninsured flood plus subrogation can exceed £25,000.

Is frost-setting enough?

Not on its own. Boiler frost-protection only runs the circulation pump and fires the boiler when water drops below the set point. If a radiator is broken, a pipe has an air lock, or the pump fails, protection breaks. Frost-protect also doesn't help loft or exterior pipes outside the circulation loop — those need separate lagging. Use frost-protect as backup to an 8°C thermostat, not primary protection.

How often should I check during void?

Weekly minimum; more often during cold snaps. Most insurance policies require at least fortnightly inspections with written log. Cover: heating running, no leaks, windows closed, mail not blocking, no signs of forced entry, gutters clear. Document each inspection. During cold below -2°C, inspect every 2–3 days.

Can a letting agent handle void winterisation?

Yes, and most London agents offer void property management as a paid add-on. Fees £40–£100 per inspection plus works cost. Confirm in writing who handles each element. The landlord remains the duty-holder — delegating to an agent doesn't transfer the legal responsibility. Keep copies of the agent's inspection reports for insurance evidence.

What about summer void periods?

Full winterisation isn't needed in summer but several checks still apply: turn off washing machine and dishwasher supply valves, test the stopcock, check for small leaks that could become floods over weeks, keep the property secure, and notify the insurer about unoccupancy beyond the threshold. Summer voids carry lower freeze risk but similar claim rejection risks for long-term leaks.