Asbestos Diagnosis Grand-Saconnex

Grand-Saconnex: a unique built profile shaped by international organisations

Grand-Saconnex is a municipality of rare geographical and functional singularity in Switzerland. Gateway to Geneva International Airport and headquarters of numerous international organisations — the United Nations, the World Health Organization, the International Labour Organization, among others — the municipality is home to a property stock of exceptional diversity: diplomatic residences, institutional buildings, office buildings and quality residential housing.

This functional diversity is compounded by a construction timeline that places a significant proportion of the building stock in the critical period for asbestos. The intense development of the municipality between the 1950s and the 1980s, to accommodate the influx of international organisations and the growth of airport-related services, produced buildings constructed to the standards of the time — which systematically integrated asbestos-based materials.

The large institutional structures constructed from the 1950s to house United Nations organisations present significant surface areas, complex ventilation systems and construction materials specific to the institutional architecture of the period. These buildings have undergone successive renovations that added further layers of materials, some potentially asbestos-containing, to the original structures.

Diplomatic residences and housing for international civil servants, constructed in the 1960s–1975 period in the municipality’s residential districts, follow a different but equally affected profile: high-end villas and buildings from the full period of asbestos use.

Which buildings are concerned in Grand-Saconnex?

The municipality presents three main building typologies with distinct asbestos risk profiles.

Institutional buildings and international organisations

Buildings constructed to house international organisations in the 1950s–1980s constitute the category most specific to Grand-Saconnex. These large-surface structures — conference rooms, offices, technical premises — were built using techniques and materials specific to the institutional architecture of the period: sprayed coatings in large halls, fibre cement suspended ceilings over large surfaces, sprayed acoustic insulation, large-section asbestos-cement ventilation ducts, extensive pipe network lagging.

Even if some of these buildings are subject to international law and particular regimes, properties subject to ordinary Swiss law are fully covered by Genevan cantonal obligations regarding prior diagnosis.

Office buildings and business premises

Office buildings constructed in the 1960s–1980s in the airport zone and near international organisations present configurations typical of tertiary sector buildings of the period: vinyl floor tiles over large surfaces, suspended tile ceilings, removable lightweight partitions based on fibre cement, air conditioning ducts.

Diplomatic residences and housing

Diplomatic residences and residential housing constructed for international civil servants in the 1960s–1975 period present the usual materials of quality residential construction of the time: vinyl tiles, fibre cement, pipe insulation. These properties, often large and well maintained, are nonetheless subject to the obligation of prior diagnosis before works.

Common asbestos-containing materials in Grand-Saconnex

Grand-Saconnex’s built fabric from the 1950–1980 period presents a particularly wide range of materials due to the diversity of typologies:

• Sprayed coatings in large halls, corridors and technical spaces of institutional buildings
• Fibre cement tile suspended ceilings over large surfaces in office buildings
• Large-diameter asbestos-cement ventilation and air conditioning ducts
• Lagging on extensive heating and plumbing networks in large buildings
• Vinyl-asbestos floor tiles in offices, circulation areas and housing
• Removable lightweight partitions based on asbestos-cement sheets in office spaces
• Sprayed acoustic insulation under slabs and in partitions of institutional buildings
• Large-surface flat roof waterproofing membranes
• Curtain wall facade and glazing joints and mastics from the 1960s–1975 period

Technical rooms, central boiler rooms and large-dimension ventilation shafts often concentrate the most friable and most degraded materials.

Regulations applicable in Grand-Saconnex

Grand-Saconnex is located in the canton of Geneva. Buildings subject to ordinary Swiss law — that is to say the vast majority of private, commercial and institutional constructions not covered by international law immunities — are fully subject to the obligation of prior investigation before any construction site likely to disturb materials in a building predating 1991.

For projects requiring a building permit, the diagnostic report must be attached to the OAC file. The size and complexity of many Grand-Saconnex buildings often imply large-scale diagnoses, with a high number of samples and a detailed analysis of ventilation systems and technical premises.

Buildings of international organisations are generally subject to their own internal rules on occupational safety and health, which include asbestos management. These rules are often aligned with international best practices and may be even more demanding than cantonal regulations.

Neighbouring communes served

We operate in Grand-Saconnex and all neighbouring communes:

• Geneva city (Servette, Les Grottes)
• Meyrin (airport zone)
• Vernier
• Pregny-Chambésy
• Bellevue
• Collex-Bossy

Frequently asked questions about asbestos diagnosis in Grand-Saconnex

Is a building belonging to an international organisation subject to Swiss asbestos rules?

International organisations benefit from particular legal statuses that may include certain immunities. However, regarding occupational safety, most major international organisations apply strict internal rules that align with Swiss obligations. For buildings belonging to entities subject to ordinary Swiss private law, Genevan rules apply in full.

Is the Grand-Saconnex airport zone subject to specific rules for asbestos diagnosis?

Buildings in the airport zone are subject to the same obligations as other Genevan buildings predating 1991. Proximity to the airport does not imply particular rules for asbestos diagnosis itself. However, certain construction or renovation projects in this zone may be subject to additional constraints related to airport security.

For a large 1960s office building, must the diagnosis cover all floors and technical premises?

Yes, a complete diagnosis before renovation works must cover all zones likely to be affected by the works. For technical premises — boiler rooms, ventilation shafts, cellars — particular attention is required as these zones often concentrate the most friable materials. If only certain floors are affected by the works, the diagnosis scope can be adapted, but common technical premises must be included.

Are there subsidies for asbestos diagnosis in large institutional buildings?

Asbestos diagnosis is not subsidised as such in the canton of Geneva. However, for large institutional buildings, a comprehensive diagnosis carried out in a single mission is significantly more economical than multiplying individual diagnoses over successive projects. This approach is recommended for property owners managing a portfolio of several buildings.

What are the specific features of a diagnosis in an active building with access constraints?

For institutional buildings with access constraints — secured zones, restricted hours, presence of staff — the diagnosis can be organised in coordination with the building’s technical and security services. The expert adapts their schedule to access constraints and can carry out samples over several visits if necessary. This organisation is anticipated on initial contact.