One of the main advantages offered by aluminium joinery is the service life. As time goes by the aluminium hardens, has a reduced weight compared to PVC and laminated wood, and the coefficient of expansion is very small. Significant differences are also regarding the weight of the glazed surface, keeping the exterior appearance for a long time. It is excellent in terms of the effects of the sun's rays on it. It is the recommended material for large joints taking into account weight and dilation. Another advantage is the possibility to choose, from a variety of colours and textures, even two-colour, with a remarkable resistance over time.