ABSTRACT
The renovation of damaged sewage conduits is a real problem. The demand for their renovation has led to the establishment of many specialized companies and also to the development of new and more effective methods. Currently, the dominant method on the market is a method that uses sleeves that harden on site, the so-called CIPP (Cured-in-Place Pipe), which has been known since 1971. In recent years, new variations of this method have been developed that aim to shorten the renovation time and reduce costs. The evolution of this method and the stages of its development are the subject of the paper.
