Measures and assesses the type and dimensions of glass and mirrors required in the installation of windows, skylights, display cases, interior walls and ceilings Removes and replaces damaged or broken glass and mirrors Cuts and shapes glass and mirrors to specified dimensions, smooths rough edges, applies decorative finishes, and marks any defective areas in the final product Prepares surfaces for glass and mirror installation, including cleaning and applying adhesives Ensures proper alignment and positioning of glass and mirrors before installation Fits glass and mirrors into frames, windows, skylights, doors and other structures