If you want you to work on it in winter, we recommend that you pay attention to more solid profiles in combination with two -chamber double -glazed windows. Only such a design is able to maintain heat on the balcony. The most interesting option for glazing the balcony will be the merger of the balcony with living space. So you can with minimal efforts with the help of Defenster specialists to significantly increase your apartment. But in this case, it is worth paying special attention to the thermal insulation of the balcony, which can be provided by a five -core profile system.