In light of concerning evidence that many young people with mental disorders are not receiving appropriate mental health intervention, school-based mental health screening has been advocated as one way to improve identification of at-risk youth. Despite having much promise, universal screening in schools remains a relatively uncommon practice internationally. Various barriers that deter school psychologists and counsellors from screening have been identified, including lack of resourcing to implement screening, lack of knowledge about the mechanics of how to carry out a screening program, and concern about how to manage the anticipated increased workload generated by following up identified students. In this practice-based paper we discuss a four-stage process that guides school psychologists and counsellors in the establishment of a school-based screening program, with specific reference to overcoming perceived barriers.