SÄLZER was charged with the production and installation of 12 skylights for a correctional facility in Germany. In the fully glazed aluminium constructions vent windows are integrated for the ventilation and smoke extraction. In order to reduce the installation costs in around 30 m height, the skylights were completely assembled at SÄLER. Already 3 of the approx. 5 x4 m skylights were transported to the construction site. The contract also includes the dismantling of the old skylights. By fixing crossbars on the old skylights the dismantling in one piece was possible, so the skylights did not have to be disassembled in the height.Then the new elements were installed. Gradually, the remaining 9 skylights will be replaced in the current year.