Determine plumb of walls or ceilings, using plumb lines and levels.

Fasten glass panes into wood sashes or frames with clips, points, or moldings, adding weather seals or putty around pane edges to seal joints.

Prepare glass for cutting by resting it on rack edges or against cutting tables and brushing thin layer of oil along cutting lines or dipping cutting tools in oil.

Cut, fit, install, repair, or replace glass or glass substitutes, such as plastic or aluminum, in building interiors or exteriors or in furniture or other products.

Grind or polish glass, smoothing edges when necessary.

Measure and mark outlines or patterns on glass to indicate cutting lines.

Set glass doors into frames and bolt metal hinges, handles, locks, or other hardware to attach doors to frames and walls.

Install pre-assembled metal or wood frameworks for windows or doors to be fitted with glass panels, using hand tools.

Confer with customers to determine project requirements or to provide cost estimates.

Select the type or color of glass or mirror according to specifications.