Mould in the House in Mallorca: Causes, Responsibilities and Remediation
Mould in homes on Mallorca is not a niche issue affecting a handful of unlucky old buildings – it's a structural characteristic of the island that many German-speaking owners and tenants only discover during their first properly wet winter. Houses built for hot summers reach their limits when faced with rain, wind and lower temperatures: rising damp in older buildings, condensation on uninsulated exterior walls, leaking flat roofs. This guide answers two questions that most articles on the topic fail to address: why does this problem manifest differently on Mallorca than in Germany – and who ultimately bears the cost of remediation if you're an owner within a Comunidad, a tenant, or the buyer of a recently renovated house?
Do you suspect damp or mould in your property on Mallorca and don't know who's responsible?
- Submit a personal enquiry — we'll assess your case and put you in touch with the right contacts
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Why the problem is different on Mallorca compared to Germany
A large share of the island's older building stock was constructed without a damp-proof barrier in the foundations. Masonry made from the local sandstone Marés is naturally absorbent – rising damp (humedad por capilaridad) is therefore a classic phenomenon in older Mallorcan buildings that has hardly any equivalent in comparable form in newly developed areas in Germany.
On top of that, many houses were conceptually built for summer, not winter: little or no insulation, often still single glazing, cool stone floors. As soon as warm, moist indoor air meets cold exterior walls in winter, it condenses there – this is the second major cause category, condensation damp (humedad por condensación). Particularly affected are houses that stand empty for months without being ventilated or heated – a situation that applies precisely to many second homes owned by German-speaking owners.
Structurally, there are two further factors that are far more widespread on Mallorca than in Central Europe: flat roofs and terraces above living spaces, whose waterproofing deteriorates over time and then shows up as water stains on the ceiling of the room below. And salt-laden air near the coast combined with short but intense rainfall, which puts more strain on façades and drainage than steady, prolonged rain.
Overview of the four typical patterns of cause
| Cause pattern | Typical feature | Typical location in the house |
|---|---|---|
| Rising damp (capillarity) | Damp base zone, often with salt efflorescence | Lower wall areas, older buildings without a damp-proof barrier |
| Condensation damp | Mould patches on cold exterior walls, musty smell | Bedrooms, poorly heated rooms, wall corners |
| Penetrating rainwater | Water stains that worsen with rainfall | Ceilings beneath flat roofs/terraces, window junctions |
| Water pipe damage | Localised patch, often without any connection to weather | Bathrooms, kitchens, riser pipes |
Note: This table describes patterns of causes, not a diagnosis. Which cause applies in an individual case must be determined by a specialist on site – only then can it be said which remediation method makes sense and who must bear the costs.
First step: clarify the cause, don't just treat the symptom
Before responsibility and costs can be discussed, the cause must be established. The four patterns of causes mentioned above require completely different measures – and, above all, different parties responsible. Anyone who hastily reaches for anti-mould products themselves often only treats the surface, while the actual cause (such as a leaking roof seal or a faulty riser pipe) continues to cause damage. If you suspect structural causes, bring in a building surveyor or a specialised firm before commissioning tradespeople to carry out the remediation.
If you are currently viewing or planning to buy a property on Mallorca, it is worth specifically checking for signs of damp before the notary appointment – find out more in our guide to House inspections and surveyors on Mallorca.
Who pays within the community of owners: Art. 10.1 a) LPH
If you live in a flat within a Comunidad de Propietarios, the key question is: does the cause lie in the communal property – façade, roof, riser pipe, communal waterproofing – or in the private property of your flat?
The consolidated version of the Ley 49/1960 sobre Propiedad Horizontal regulates in Art. 10.1 a) a point that many owners are not aware of: works that are necessary for the proper maintenance and fulfilment of the building's and its communal facilities' conservation obligation – including measures required to meet basic requirements for safety, habitability and accessibility – are mandatory and do not require a prior resolution of the owners' assembly.
Attention: The common advice that "the assembly must first pass a resolution" is wrong if the damp actually originates from a communal element. In this case, maintenance is an obligation of the Comunidad, not a discretionary decision.
The distinction between communal and private property arises from the Título constitutivo and the statutes of the respective Comunidad – it is worth taking a look at your community of owners' documents or speaking with the management. You can find out more about rights and obligations within a Comunidad in our guide to Community of owners in Spain.
Who pays as a tenant: Art. 21 LAU
If you rent a flat or house on Mallorca and discover mould, the Ley 29/1994 de Arrendamientos Urbanos (LAU) applies. Art. 21.1 obliges the landlord to carry out all repairs necessary to keep the property in a habitable condition – and without being allowed to increase the rent for this, unless the damage is attributable to the tenant.
| LAU Article | Regulation |
|---|---|
| Art. 21.1 | Landlord must bear all necessary repairs for habitability, without a rent increase |
| Art. 21.2 | If an unavoidable maintenance measure lasts longer than 20 days, the rent is reduced proportionately |
| Art. 21.3 | Tenant must report the need for repairs as quickly as possible and allow access for inspection |
| Art. 21.4 | Minor repairs arising from normal use are borne by the tenant |
In practice, this means that mould in a rented flat is, first and foremost, a reporting obligation. Report the infestation to the landlord promptly and in writing, allow access for an inspection, and document the condition with photos and dates. Only after that can it be determined whether there is a structural cause or a usage-related one – a question that is decided on a case-by-case basis and cannot be answered in general terms here. If urgent action is needed to prevent immediate damage, the tenant may, after notifying the landlord in advance, act independently and demand immediate reimbursement of the costs. You can find further details on rights and obligations in longer-term tenancies in our guide on Long-term renting in Mallorca.
Who pays after a new build or renovation: Art. 17 and 18 LOE
If you have newly built or extensively renovated a house and dampness subsequently appears, the Ley 38/1999 de Ordenación de la Edificación (LOE) applies. It distinguishes three time limits starting from the unconditional acceptance of the building:
| Time limit from acceptance | Covered damage | Liable parties |
|---|---|---|
| 10 years | Material damage caused by defects in the foundation, columns, beams, floors, load-bearing walls or other structural elements | all parties involved in construction |
| 3 years | Material damage caused by defects in components or installations that breach habitability requirements | all parties involved in construction |
| 1 year | Execution defects in finishing and surface works | only the building contractor (constructor) |
For damp damage, it is typically the three-year period applicable, since penetrating damp or defective waterproofing affects the habitability of the building. This is a rough classification, not a definitive legal opinion – the specific categorisation depends on the particular defect involved.
Watch out – the point almost everyone gets wrong: The ten-year period under Art. 17 LOE is not a limitation period for filing a claim. It merely describes the timeframe within which damage must occur in order to be covered at all. Art. 18 LOE stipulates that the resulting claims become time-barred within two years from the occurrence of the damage. Anyone assuming they have ten years to file a claim is mistaken.
You can find more on construction defects and liability in existing buildings, beyond damp issues, in our guide to Construction defects and liability in Mallorca. If you're planning a renovation and want a rough idea of what costs to expect, you'll find guidance in our guide to Complete renovation in Mallorca.
Procedure: how to proceed if you suspect mould
- Document the cause: Record photos, date, affected rooms, and weather correlation (does the stain only appear when it rains?).
- Bring in an expert: Commission a building surveyor or specialised firm to clarify the cause before any renovation work begins.
- Clarify responsibility: Communal property (Comunidad, Art. 10.1 a) LPH), tenancy (Art. 21 LAU), or construction defect (Art. 17/18 LOE)?
- Notification: As a tenant, inform the landlord immediately (Art. 21.3 LAU); as an owner in a Comunidad, notify the management in writing.
- Check insurance: Check the policy for damp and water damage cover and report the damage to the insurer promptly – the details are governed by the respective policy; more on this in our guide to Home contents insurance in Spain.
- Commission the repair: Only have the actual repair work carried out once the cause and responsibility have been clarified – you'll find a suitable company in our Construction & renovation directory or under Architects & planners.
- Keep the documentation: Archive invoices, expert reports and photos for later sale or insurance claims.
Health and insurance: what you should bear in mind
Mould infestation can be relevant to your health. If you experience persistent health issues, you should seek medical advice – this guide cannot and does not intend to provide a general medical assessment. Equally individual is the question of whether, and to what extent, a household contents insurance policy covers damage caused by damp or mould: this is governed exclusively by the respective policy. Check your insurance terms and report any damage promptly so as not to breach deadlines or obligations.
The most common mistakes with damp and mould in Mallorca
- Treating the symptom instead of the cause: Repainting walls or using anti-mould products without clarifying the actual source of moisture.
- Assuming the wrong responsibility: As an owner, believing that the Comunidad must first pass a resolution, even though Art. 10.1 a) LPH stipulates an immediate obligation for communal elements.
- Reporting too late: As a tenant, reporting the damage only after weeks instead of communicating it as quickly as possible in accordance with Art. 21.3 LAU.
- Confusing the ten-year period with the limitation period for claims: The ten-year period under Art. 17 LOE describes the timeframe within which damage must occur – not the period during which a claim can be filed. The actual limitation period is two years from the occurrence of the damage (Art. 18 LOE).
- Ignoring vacancy: Neither ventilating nor heating a second home for months on end, and then being surprised by sudden infestation.
- No documentation: Without photos, expert reports and invoices, nothing can later be proven to the insurance company, the previous owner or the building contractor.
Checklist: mould in the house in Mallorca
| Step | Done? |
|---|---|
| Cause documented with photos (date, weather conditions) | ☐ |
| Specialist/expert commissioned to clarify the cause | ☐ |
| Responsibility checked (Comunidad, landlord, building contractor) | ☐ |
| Written notification sent to the management or landlord | ☐ |
| Insurance policy checked for damp damage cover | ☐ |
| Quote obtained from a specialist company | ☐ |
| Renovation commissioned after cause clarified | ☐ |
| Documents (expert reports, invoices, photos) archived | ☐ |
What comes after the renovation?
After a successful renovation, the work doesn't end with the last tradesman's visit. Keep all documents – expert reports, invoices, photos before and after the renovation – permanently. They are important should a legal dispute arise later over limitation periods under Art. 17/18 LOE, and they increase buyers' confidence in a later sale. For buildings with a Libro del Edificio, documentation of the renovation ideally belongs in this building record book – more on this in our guide to the Libro del Edificio. Monitor the renovated areas over at least one winter period to make sure the cause has actually been eliminated and not just the symptom.
Conclusion
Dampness and mould in houses on Mallorca are rarely a pure ventilation problem – usually behind it lie the island's structural peculiarities: missing damp-proofing in old buildings, lack of insulation, leaking flat roofs or months of vacancy. Anyone affected should first have the cause clarified before taking action. Legally, it pays to look at the details: as an owner in a Comunidad, you can invoke a statutory maintenance obligation without a general assembly resolution for damage to common areas (Art. 10.1 a) LPH). As a tenant, you have a clear duty to report and, under certain circumstances, a right to a rent reduction (Art. 21 LAU). And for new-build or renovation defects, the three-year period of the LOE applies – with a limitation period that already kicks in two years after the damage occurs, not only after ten years.
Official sources
- Ley 49/1960 sobre Propiedad Horizontal (consolidated version), Art. 10.1 a) – https://www.boe.es/buscar/act.php?id=BOE-A-1960-10906
- Ley 38/1999 de Ordenación de la Edificación (LOE), Art. 17 and 18 – https://www.boe.es/buscar/act.php?id=BOE-A-1999-21567
- Ley 29/1994 de Arrendamientos Urbanos (LAU), Art. 21 – Boletín Oficial del Estado: https://www.boe.es