Window replacement in Switzerland: Costs and energy efficiency

Replacing windows in Switzerland can significantly reduce heat loss, drafts, and external noise, but a full replacement is not always necessary. Experts suggest that a thorough assessment of existing frames, glass, fittings, and connections to the building envelope should precede any purchase. In some cases, repairing damaged parts, replacing seals, or upgrading glazing on historical wooden windows can provide energy improvements without a total replacement.

According to EnergieSchweiz, modern triple-glazed thermal insulation windows, including installation and disposal, cost approximately CHF 1,200 per square meter of window area, though prices vary based on material and installation complexity. Windows typically have a lifespan of 25 to 40 years. Replacement is particularly recommended if windows are of that age, show visible damage, or if single or double glazing is still in use. In a typical single-family home, windows can account for roughly 13% of the total energy used for heating, hot water, and electricity.