A brown stain on the ceiling, a swelling parquet floor, water seeping from under the dishwasher: water damage is the most frequent claim in Swiss homes, far ahead of fire. In Geneva and Lausanne, where most people live in apartment buildings, it almost always affects several parties at once: the tenant, the neighbour below, the property manager, sometimes a whole condominium. What happens in the first hours often decides the extent of the damage and the bill. This guide explains what to do, who pays and how to stop it happening again.

The first five steps

Before calling the insurer, stop the water and make the home safe. In this order:

  1. Shut off the water: the valve under the sink or behind the appliance if the leak is local, otherwise the flat's stop valve, often in the service shaft, the entrance cupboard or the bathroom. In a house, the main valve is usually near the water meter.
  2. Switch off the electricity in the affected area if water reaches sockets, a ceiling light or the electrical panel. Do not touch a wet appliance that is still plugged in.
  3. Warn the neighbour above or below, then the property manager, the caretaker or the on-call service. At weekends, most property managers in Geneva and Vaud have an emergency number.
  4. Take photos and video before tidying up: ceiling, walls, floors, furniture, the faulty appliance, the meter. These images are worth more than any description.
  5. Limit the damage: mop up, remove rugs and objects, raise furniture, put bowls under drips. Keep damaged items until the loss adjuster has visited.

Insurers expect these measures. Damage made worse by inaction can reduce the payout.

Who pays: building, contents and liability insurance

Water damage usually involves several insurance policies, each for its own share.

  • The owner's building insurance covers the building itself: pipes, walls, ceilings, floors, fitted kitchen and bathroom, plus the cost of leak detection and drying. In a condominium, this is the PPE's policy.
  • Contents insurance covers furniture, clothes, electronics and personal belongings, whether they belong to a tenant or an owner-occupier.
  • Personal liability insurance applies when someone is responsible for damage caused to others: an overflowing bath, a badly fitted washing-machine hose. It compensates the neighbour or the owner, minus the deductible, often CHF 200 or more.

There is an important difference between the two cantons. In Vaud, the compulsory ECA building insurance covers fire and natural hazards, but not a burst pipe or a leaking installation: the owner needs a private water-damage policy on top. Geneva has no cantonal insurer: building insurance is private and generally includes water-damage cover, which should be checked in the policy.

The claim is normally filed within days of discovery. Read your policy: some insurers require notice within 48 hours for major damage.

What insurers often exclude

Not every arrival of water counts as water damage under the contract. The most common exclusions:

  • Rain seeping in through the roof, the facade or a window, often covered only by an extension or treated as poor maintenance.
  • Gradual damage: a shower seal that has been cracked for months, condensation, old mould.
  • Frost in an unheated home, such as a holiday home whose pipes were not drained.
  • Repairing the cause itself, such as a faulty appliance, as opposed to the damage it caused.

Flooding from rivers or surface run-off falls under natural hazards: the ECA in Vaud, private building insurance in Geneva. Sewage backflow follows different rules depending on the contract.

Tenants: tell the property manager without delay

The Swiss Code of Obligations requires tenants to report immediately to the landlord any defect they cannot fix themselves. A tenant who delays may be liable for the damage getting worse. A phone call is not enough: confirm in writing, by email or letter, with photos and the date of discovery.

Repairing the building is then the landlord's responsibility. As long as use of the home is reduced, for example an unusable bedroom or dehumidifiers running day and night, the tenant can ask for a proportional rent reduction, in writing to the property manager. If the tenant caused the damage, their liability insurance covers the damage to the owner's property and the neighbours.

Leak detection: finding the source without breaking everything

A ceiling stain rarely appears directly below the leak. Water follows slabs, ducts and pipes before it shows. Opening walls at random is expensive and guarantees nothing. Non-destructive methods locate the source to within a few centimetres:

  • A thermal camera picks out damp areas and the routing of hot-water pipes.
  • Pressure-testing the network, section by section, shows which pipe is losing water.
  • Tracer gas, a nitrogen and hydrogen mix injected into the pipe, is detected at the surface above the leak.
  • Acoustic listening and endoscopy complete the diagnosis in ducts and suspended ceilings.

Leak detection generally costs from a few hundred to CHF 1,500 depending on complexity. When the damage is covered, building insurance usually pays these costs.

Drying out: the step you cannot rush

Once the leak is repaired, the longest part begins. A soaked wall or screed takes weeks to dry, and repainting too early brings stains and mould back a few months later.

  • Drying the room air with dehumidifiers is enough for lightly affected walls, in one to three weeks.
  • A soaked screed under parquet or tiles needs suction or injection drying within the insulation layer, often three to six weeks.
  • Moisture readings at the start and end of the works serve as evidence for the insurer and prevent closing up too soon.

Mould can appear within 48 to 72 hours on materials that stay damp. Ventilate, heat moderately and cover nothing until the readings give the all-clear.

Preventing the next leak

Most claims come from a few well-known weak points.

  • Washing-machine and dishwasher hoses age: replace them every five to ten years, or choose a model with leak protection.
  • Silicone seals around the shower and bath should be redone as soon as they darken or come away.
  • In buildings from the 1950s to the 1980s, galvanised steel pipes rust from the inside. Repeated leaks in the same riser often signal a replacement to plan.
  • A properly set pressure reducer protects taps and appliances.
  • A holiday home should be drained or kept frost-free in winter.

Connected leak detectors, combined with a motorised valve on the water supply, shut off the water automatically as soon as they detect moisture on the floor. Integrated into a home-automation system, they also send an alert to your phone, which makes all the difference when you are away.

How SmartHaus Swiss handles water damage

We combine plumbing, electrical work and interior finishing: the same contact follows the water damage from the leak to the last coat of paint.

  1. Call-out to stop the leak and make affected electrical installations safe.
  2. Non-destructive leak detection and repair of the faulty pipe or appliance.
  3. Report with photos, moisture readings and a detailed quote for the insurer and the property manager.
  4. Coordination of drying and an end-of-drying check.
  5. Reinstatement: plastering, painting, floors, tiling, kitchen or bathroom.
  6. On request, leak detectors and an automatic shut-off valve for the future.

Frequently asked questions

Who pays for water damage coming from the flat above?

Damage to the building is covered by the owner's building insurance, your furniture by your contents insurance. If the occupant above is responsible, for example a badly connected washing machine, their liability insurance pays, and the insurers settle claims between themselves afterwards.

Does the ECA cover water damage in the canton of Vaud?

No, not leaks and burst pipes. The ECA covers fire and natural hazards, including floods. Water damage from installations requires a complementary private building policy.

How long does drying take after water damage?

One to three weeks for lightly affected walls, three to six weeks for a soaked screed under a floor covering. Only moisture readings can tell when drying is finished.

Is a tenant entitled to a rent reduction after water damage?

Yes, if use of the home is reduced during repairs or drying, provided the defect was reported to the landlord. The reduction is proportional to the inconvenience and must be requested in writing.

Do all the pipes need replacing after a leak?

Not necessarily. An isolated leak is repaired locally. Repeated leaks on old galvanised pipes, however, point to widespread corrosion, and replacing a riser then costs less than a series of claims.