The first part of this paper presents a sensitivity analysis of a comprehensive chloride ingress model. The sensitivity study is used to identify the more influencing environmental and model parameters. In a second part, the model of chloride ingress is adapted to model maintenance by cover rebuilding. This model allows us to study the effect of three parameters: quality of the repair material, repair depth and repair interval. From this study, it is concluded that there are optimum values that minimize both material costs and environmental impact.