NB This pdf is a large file. If you have problems downloading it after purchase, contact bookshop@bre.co.uk. A methodology for protecting and repairing concrete structures using a performance-based intervention approach is presented in this major report, which has been prepared by the CONREPNET network of European research and representative bodies sponsored by the European Commission. It explains current practices and recent research and developments, and the drivers for change. It then considers performance-based approaches, develops concepts for performance-based intervention in concrete repair and sets down ways for translating owners' requirements into technical solutions. The third part deals with issues of applying performance-based intervention. Conclusions from the findings of the network organisations and recommendations on a number of fronts are then made. Annexes provide extensive background information. 190 pages.