For apartment buildings, public buildings or rental property for every developer it is important that the building is set up fast and with minimal costs, but the building itself must be heat efficient. For years we have been offering a product called Pre-fabricated infill walls. The main construction frame of the building or office building can be done in steel, concrete or CLT frame and we do prefabricated and insulated façade elements, which can make the façade of the building finished in a very short time. The infill elements can be done with windows pre-installed, insulated and partially finished façade. The average time of mounting and finishing the façade for a 1500 m2 office space building is 6 weeks.