URETEK was contacted by a shopping centre with a long history the city of Tartu, whose main tenant is Prisma – a beloved supermarket among the residents of Tartu. Considering the building conditions, the shopping centre was built on complicated soil and due to that the parts of the supermarket floors which had to bear heavier inventories and goods had started to sink. Fortunately, an inspection revealed that the sinking was only in the floors and the load-bearing structures were intact and without any damages. The area of the floor that had sunk in the warehouse and in the sales hall of Tartu Prisma was 500 m2 and 600 m2 respectively. Since the daily activities of Prisma could not be interrupted, the necessary works in the warehouse were performed in four consecutive nights and the works in the sales area in three consecutive nights without closing the shop for customers. This allowed the customers to maintain their daily rhythm during the repair works and did not entail any additional costs.