What is cullet glass?

Cullet glass is waste glass that is crushed for use in recycling. It can be sourced internally, at the plant where architectural or float glass is manufactured. There is also pre-consumer cullet that comes from the offcuts and waste at the fabricating plant. Lastly, there is end-of-life cullet that would come from construction demolition, any glass that won’t be reused. End-of life glass is rarely recycled.