Materials that would otherwise be discarded but are incorporated into a new building are considered...

Reused materials are materials that have been used before and are incorporated into a new building without significant alteration1. They are different from recycled materials, which are materials that have been reprocessed into new products or materials2. Reused materials reduce the demand for new resources and the amount of waste sent to landfills1. LEED v4 encourages the use of reused materials by awarding points for Building Product Disclosure and Optimization - Sourcing of Raw Materials3.

Construction Waste Management | WBDG - Whole Building Design Guide1

Why plastic waste is an ideal building material - BBC Future2

LEED v4 | HPAC Engineering3