Don’t confuse recycled content materials with reused or salvaged materials:

Recycled Content: Recycled content is incorporated during the manufacturing process from waste products. For example, carpet may be made from used plastic bottles, or plywood may contain waste wood left over from window manufacturing.
Reused Materials: Reused materials are typically salvaged items that have not been remanufactured into a new product, for example, antique wood doors that were salvaged from an old church, or bricks salvaged from demolition and reused.