The durability of Accoya is Class 1 (EN 350), the highest durability class possible and has extensive quality certifications (KOMO, RAL, WDMA, etc.) and is warranted to last 50 years above ground and 25 years in ground or freshwater. Compared to most materials Accoya’s longer lifespan enables lower material consumption and less replacement! This also means that Accoya has carbon sequestration advantages as it locks CO₂ for a longer time from the atmosphere. In fact, because of low emissions during production combined with the increased life span and good recyclability, Accoya window frames are even assessed to be CO₂ neutral over the full life cycle. This is why Accoya is one of the best sustainable building materials. For more information see environmental assessments.