Although there are no formal educational requirements to become a glazier, high school math courses are considered useful. On the job, trainees often start with basic tasks such as carrying glass and cleaning up debris in glass shops. By working with experienced glaziers, trainees eventually acquire the skills of a fully qualified glazier. After several months, trainees start making their first cuts on discarded glass. Later, they may begin cutting glass and helping experienced workers on simple installation jobs.
Some glaziers learn their trade through a three-year apprenticeship. On the job, they learn to use the tools and equipment of the trade; handle, measure, cut, and install glass and metal framing; cut and fit moldings; and install and balance glass doors. Technical training includes instruction in glass and installation techniques as well as basic mathematics, blueprint reading and sketching, general construction techniques, safety practices, and first aid.
After completing an apprenticeship program, glaziers are considered to be journey workers who may do tasks on their own.