Windows are one of the key elements in modern construction. They are the link between the interior of the building and the outside world and play a key role in the aesthetics of the façade. Apart from modern design, windows should also guarantee high insulation parameters and ease of use. When looking for modern solutions which are not only aesthetically pleasing and practical, but also environmentally friendly, it is worth reaching for aluminium systems. They guarantee all the above-mentioned features and offer great possibilities in terms of adapting the window variant to the individual requirements of the building and its users.