10. Maintenance/repair of the LINIT system Inspection The LINIT U-profiled glass system is a tough long-lasting glazing system. Nevertheless, it is advisable that the specialist glazing company be allowed to monitor the glass facade (glass and frames, glass-to-glass joints, glass-to aluminium joints, aluminium-to-substructure joints, etc.) at regular intervals of not more than 5 years throughout its service life. This will prevent, for example, other harmful influences incurred by other materials (e.g. rainwater draining onto the glass from concrete elements or steel beams). Appropriate maintenance contracts can be offered by the gla- zing company. Cleaning When cleaning the glass facade, care must be taken to ensure that no clea- ning agent is used which might engender a chemical reaction with glass or aluminium, or which might corrode the sealing materials. Repair glazing In the event of damage, LINIT U-profiled glass can be easily replaced. The in- dividual glass strip can be lifted out of the glass frame once the silicon joints of the elements concerned have been cut off. Once cleaning has been carried out, the new glass can be inserted and properly sealed in again. Under certain circumstances, due to the production tolerances, minor colour differences may occur between the new and old glass.