The lifespan of external wall cladding systems depends on the material specified and the quality of installation and maintenance. Metal rainscreen systems can last 40 to 60 years with minimal maintenance. Fibre cement panels typically have a warranted life of 30 to 50 years. Timber cladding requires more regular maintenance but can last 30 or more years if correctly specified and treated. Render systems typically carry 25-year system warranties.