The lifespan of Venetian blinds varies depending on the material and maintenance. Timber Venetian blinds, with proper care, can last many years due to the durability of the wood. PVC blinds are highly resistant to moisture and warping, making them a long-lasting option for humid environments. Aluminium blinds are also durable and can withstand frequent use without significant wear. Generally, well-maintained Venetian blinds can last around 5 to 10 years or more, depending on usage and environmental conditions.