At the beginning, an inventory was taken in a sample shaft. On the basis of this detailed documentation, a reorganization concept was developed, which was approved after close coordination with the technical expert of the construction project and carried out by Lindner Isoliertechnik. This is how a first sample shaft was created. Subsequently, a tender could be drawn up by the architects, which described the resulting renovation work. These included:

• Upgrading the masonry
• Dismantling of all defective bulkheads and masonry closures
• New installation of cable insulation in S90 and pipe inusulation in R90
• Reinsolation of all lines
• Shaft doors as a revision lock
• Extensive documentation with location of all foreclosures and closures

Lindner Isoliertechnik finally won the contract for this large-scale refurbishment of 195 technology shafts. In addition, the company's own door system Fireshield I90 offered a suitable system for the shaft doors from a single source. The execution turned out to be challenging because the entire refurbishment had to be carried out in night work because of ongoing operations. Additionally, in order not to impair the laboratory conditions, housings with suction devices were built.