Damp Expert in Antibes: Who to Call for a Reliable Diagnosis in the 06?

You have a damp problem in Antibes: call the independent expert first, the treatment company second

If you’re seeing damp marks on your walls, rising saltpetre, or a persistent musty smell in your Antibes property, the first step is to call in an independent building expert, not a damp-treatment company directly.

Why does this distinction matter so much? An independent expert has no commercial interest in selling you a treatment. Their sole role is to identify the real cause of the problem using professional measuring instruments, then point you towards the right technical solution. By contrast, the « free quote » offered by a treatment company almost always leads to a wall-drying or resin-injection quote, even when the actual cause might be a simple concealed water leak, repairable for around €150.

Typical causes of damp in Antibes and the Old Town (Vieil Antibes)

Antibes’ geography and architecture create the conditions for certain recurring damp pathologies:

• Severe rising damp in the Old Town behind the ramparts, in Ilette and Roc Fleurie: thick limestone walls, often with no capillary break at the base, narrow streets with little sunlight, and close proximity to the water table and Port Vauban, which keeps a constant marine humidity in the air. White or grey saltpetre typically appears on the bottom 80 cm of façade walls.
• Lateral infiltration through deteriorated stone joints, porous render, or waterproofing defects at the base of walls, common in older buildings in the town centre.
• Condensation in poorly ventilated homes or properties recently insulated without a mechanical ventilation system: warm, moisture-laden air meets cold surfaces (thermal bridges) and condenses, causing black mould in corners, behind furniture, or on bathroom ceilings.
• Concealed water leaks (pipework, drainage) or roof-terrace waterproofing defects, common in 1960s-1980s apartment blocks under co-ownership.
• Thermal bridges at floor/wall junctions or around window frames, a source of localised condensation.

Each cause calls for a different technical solution: repairing a leak, improving ventilation, treating a thermal bridge, or installing a waterproofing membrane. Expert assessment ensures you only pay for the treatment you actually need.

Who pays for the survey and the works, depending on the cause identified?

Financial responsibility depends on the origin of the problem, under precise legal rules:

• Communal areas (managing agent / syndic): if the damp comes from a leak in a shared pipe or drain, or a defect in the roof, façade, or communal drainage waterproofing, the body of co-owners (syndicat) is responsible for the works, under Article 9 of French law no. 65-557 of 10 July 1965. An expert survey establishes this origin and supports a claim against the managing agent before the Grasse judicial court, which has jurisdiction over Antibes.
• Individual owner (private areas): rising damp in a private wall, a leak in a private pipe, lack of ventilation within a unit, or a poorly maintained tile joint, it is the owner-occupier or landlord who must fund the diagnosis and works.
• Tenant or owner: condensation linked to inadequate airing is generally the tenant’s responsibility, as part of normal use of the property (Article 7 of French law no. 89-462 of 6 July 1989); however, a structurally under-ventilated home or one with significant thermal bridges is the landlord’s responsibility (Article 6: decent housing standards).

An independent survey precisely documents the cause, which provides legal certainty over who pays and prevents disputes between co-owners, the managing agent, tenants, and landlords.

The Cassini protocol: instrument-based measurements without drilling into your walls

The Cassini survey follows a non-destructive measurement protocol using three calibrated professional instruments:

• BM31 capacitive moisture meter: measures the moisture content of materials (stone, plaster, concrete) using a non-invasive method, with no drilling or damage. Readings are taken at several points (base, mid-height, top of wall) and compared against standard thresholds.
• BC21 hygrometer: measures ambient air temperature and relative humidity, and calculates the dew point, essential for diagnosing condensation. If a wall’s surface temperature falls below the dew point, condensation is unavoidable.
• BP21 infrared pyrometer: measures the surface temperature of walls, floors, and ceilings without contact, to identify cold spots (thermal bridges) and temperature differences that reveal hidden infiltration or an insulation defect.

These measurements are recorded in a written expert report with photos, a map of damp areas, identification of the cause, and costed recommendations for works. This document provides the technical basis for requesting targeted quotes or holding a third party liable.

Pitfalls to avoid in Antibes

The damp-treatment market involves aggressive sales practices that come up regularly in Antibes and across the Côte d’Azur:

• The sales-driven « free quote »: a company offers a free visit, systematically concludes it’s rising damp, and sells you a hydrofuge resin injection at €3,000-5,000, when the real cause is a €150 water leak or simply inadequate ventilation.
• Unnecessary wall drying: installing an electro-osmosis system or injecting resin into a wall when the damp actually comes from a burst pipe solves nothing, and costs you several thousand euros.
• Masking paint or render: applying an « anti-damp » coating that visually hides the marks for 6 months to a year, then blisters and peels because the cause was never addressed. Meanwhile, the damp keeps damaging the structure.
• No verifiable ten-year warranty (garantie décennale): some short-lived companies disappear before the job is finished. Always ask for a valid insurance certificate before committing to any work.

An independent survey carried out beforehand protects you from these practices and ensures every euro you spend goes towards a treatment that’s actually necessary.

Frequently asked questions about damp surveys in Antibes

How much does an independent damp survey cost in Antibes?

The cost of a damp survey for a flat or house typically ranges from €400 to €800 excl. VAT, depending on the surface area and the complexity of the building. This is easily offset by the savings made by avoiding an unnecessary treatment costing €3,000-5,000, and by the legal certainty gained over who is financially responsible (managing agent, insurer, seller).

Is a damp survey mandatory before selling a property in Antibes?

No, it is not part of the mandatory property diagnostics. However, if you notice visible signs of damp (saltpetre, mould, peeling), you have a duty to disclose this to the buyer. Commissioning a survey beforehand allows you to document the cause, cost the required works, and negotiate the sale price transparently, which protects the transaction legally.

Can my home insurance cover the cost of the survey?

This depends on your policy and the cause of the damage. If the damp results from a sudden water escape (a burst pipe, a sudden leak), your multi-risk home insurance may cover both the survey and the repairs. Gradual issues (rising damp, condensation, lack of maintenance), however, are generally excluded. Check your policy terms or contact your insurer before instructing an expert.

How quickly can a damp expert come out in Antibes?

An independent expert typically visits within 5 to 10 working days of your request, except in urgent cases (an ongoing incident, a court-ordered adversarial survey). The written report is delivered within 8 to 15 days of the site visit. In the event of a dispute with a managing agent or landlord, an adversarial survey before the Grasse judicial court can take several months, which is why carrying out an amicable survey beforehand, to attempt an out-of-court resolution, is worthwhile.

Damp expert in Antibes and across the 06 and 83: contact Cassini Expertise

For any damp survey request in Antibes (Old Town/Vieil Antibes, Ilette, Roc Fleurie, Cap d’Antibes, Juan-les-Pins) and across the Alpes-Maritimes (06) and the Var (83), contact Cassini Expertise:

• Phone: 04 22 46 06 04
• Email: [email protected]

Fast response, instrument-based measurement protocol (BM31 / BC21 / BP21), detailed written report, fully independent.

Related articles

• Damp in a wall in Nice: building expert
• Mould after a flood: who to call
• Independent expert: no works, no equipment sold

📅 Mis à jour le 25/09/2026 — Cassini Expertise, expert bâtiment indépendant (06·83·13·40).