Due to the considerable damage caused by bombing during the War, it was necessary to move to Ferdinandstraße 25 / 27 in Hamburg. The company still continued to focus on the transportation of all kinds of good, especially those requiring water-borne transport. All transport operations at this time involved a high degree of uncertainty and much organisation: For example, were there any functioning cranes in the port, or was the river blocked by the remains of blown up bridges?
Robert Gustav Hans Leinweber returned home from a prisoner-of-war camp and recommenced his work in the family business.
The company moved to bigger premises at Brandstwiete 29 in Dovenhof III, and a new line of business was started: Heavy goods transport. Transformers, reactor vessels or printing presses were delivered from the manufacturer by rail, they were then loaded onto trucks or low loaders or temporary ramps and transported directly to their destination.