We break off - when is a renovation worthwhile compared to a new building? The provocative title of the International IAB Congress and Exhibition, which will take place in Frankfurt from 14 to 15 October 2019, is intended to illustrate the explosive nature of the debate on the renovation or new construction of swimming pools. On the basis of realised projects, the topic of renovation versus new construction will be examined from various perspectives. Ernst Ulrich Tillmanns, for example, reports on the current renovation project Therme Bad Dürkheim. The event will focus on aspects such as demand planning, architecture, political decision-making, challenges in the planning and construction phase and in pre-opening.