In this video, This Old House general contractor Tom Silva and host Kevin O'Connor explains how to cut glass.
1 Lay damp rag on clean workbench, set glass on top.
2 Clean glass with window cleaner.
3 Measure and mark the glass for cutting.
4 Use duct tape to secure straightedge to glass.
5 Lubricate wheel on glass cutter with cutting oil.
6 Guide glass cutter along straightedge in one continuous pass to score the glass.
7 Peel up tape and remove straightedge.
8 Use tapper on cutter to lightly strike backside of glass along the scored line.
9 Lay glass flat with scored line over edge of workbench; press down to snap glass.