Around 75% of all Swiss buildings constructed before the 1990 asbestos ban contain asbestos-bearing materials. Asbestos was used from the 1930s to 1990 in over 3,000 building products, with the peak phase from 1970–1985. A remediation costs CHF 50–200/m² depending on extent. The greatest danger arises during renovation and demolition, when fibres are released; intact, firmly bound materials pose no immediate risk when handled properly. For a year of construction before 1990, buyers should have an asbestos assessment (CHF 500–2,000) carried out before purchase.
Asbestos is found in over 3,000 building products. Firmly bound (lower risk): Eternit corrugated sheets (10–15%), Floor-Flex tiles 30×30 cm (15–25%), window putty (5–10%), pipe cement (10–15%). Weakly bound (high risk): sprayed asbestos (Spritzasbest) on steel beams (40–70%), pipe insulation on heating/hot-water pipes (50–100%), lightweight construction boards (20–40%) and black tile adhesive (5–15%).
The latency period is 15–40 years: illnesses often only appear decades after exposure. During unprotected renovation, millions of fibres per cubic metre are released. Consequences are asbestosis (incurable lung scarring), mesothelioma (a tumour of the pleura, median survival time 12 months) and lung cancer – in combination with smoking, up to a 50× increased risk. The danger arises exclusively from inhaling released fibres.
Asbestos cannot be reliably identified with the naked eye – only a laboratory analysis provides certainty. A material sample costs CHF 100–300 per sample, takes 3–5 working days and reaches 99.9% accuracy. An indoor air measurement costs CHF 500–1,500, a complete contaminant report CHF 2,000–5,000. Telltale signs: Eternit corrugated sheets, square 30×30 cm floor tiles, grey pipe lagging in the cellar and spray textures on 1970s ceilings.
Since 1990, asbestos has been banned in Switzerland (ChemRRV); Switzerland was a pioneer in Europe. Before renovating or demolishing buildings dating from before 1990, an asbestos assessment is mandatory (EKAS Directive 6503). Only SUVA-accredited specialist firms may carry out removal; private individuals may not dispose of asbestos. Intact, undisturbed materials do not trigger a remediation obligation – only damage or renovation makes removal mandatory.
Costs range from CHF 50–100/m² for Floor-Flex floor coverings (total CHF 2,000–8,000) to CHF 200–500/m² for sprayed asbestos (CHF 30,000–100,000). Replacing roof sheets costs CHF 80–200/m² (CHF 10,000–30,000), an Eternit façade CHF 100–200/m² (CHF 15,000–40,000). The process comprises six steps: assessment, remediation concept, official notification, execution under negative pressure, clearance measurement and proof of disposal.
The seller has a duty to disclose known defects including asbestos contamination; if they conceal it, the buyer can assert warranty claims (Art. 197 et seq. OR). For a year of construction before 1990, buyers should make a contaminant analysis a condition of purchase, use the asbestos risk to negotiate a price reduction and include an asbestos clause in the purchase contract. After buying, the rule is: leave intact asbestos in place and do not work on it.