The NSW Court of Appeal has handed down its decision in Walker Group Constructions v Tzaneros Investments [2017] NSWCA 27. The plaintiff claimed damages from Walker Group Constructions alleging defective concrete paving. Once the pavement was laid, cracks began to develop, and as a result, some concrete slabs had to be repaired. Sometime later the plaintiff carried out further rectification whereby old slabs were replaced with reinforced concrete slabs. That cost was claimed from the defendant. The defendants argued that the rectification works undertaken by the plaintiff would result in betterment.