它提出了一种卷绕装置（1），用于覆盖建筑物的开口（3），包括一个平的，柔性盖元件，用于至少部分地覆盖所述至少一个建筑物开口（3）和由驱动单元卷绕构件，用于调整所述盖的覆盖区域，其中所述盖驱动 可以与卷绕元件和退绕卷绕。 根据本发明，除了第一盖（9），第二盖，其可设置在所述封盖的状态的第一盖部件搭接件（10）设置（9），其中所述盖构件（9，10）与卷绕部件（11，12）创伤和 是展开。

It is proposed a winding device (1) for covering building openings (3), comprising a flat, flexible cover element for at least partial covering of the at least one building opening (3) and a driven by a drive unit winding element for setting a cover surface of the cover, wherein the cover can be wound with the winding member and unwound. According to the invention a second cover (10) in addition to a first cover (9) is provided which can be arranged in the capping state overlapping with the first cover (9), wherein the cover elements (9, 10) with a winding element (11, 12) windable and are unwound.