Aluminium is a natural component that can be fully exposed into any kind of weather conditions. Nevertheless, this series of products using this material needs a thermosetting polyamide addition in order higher values of thermal insulation status to be achieved. ‘EUROPA’ and ‘ETEM’ companies produce opening and sliding systems with or without Thermo solutions. Which can be combined by low emissivity (Low:E) glass made by the French producing glass company ‘SAINT-GOBAIN’. The colours one can choose for this category is among white, different ral colours and wood imitations.