Anything made from wood can be considered wood waste. Usually the wood is graded and different businesses may charge different amounts, depending on grade. For example; High Grade A, such as joinery off cuts and pallets (Grade A is untreated solid hard and soft woods). Mid Grade B, such as Construction and Demolition waste wood, like flooring boards, roof timbers, plywood (some ageing and dust contamination, but non treated, usually okay with screws/nails still in place). Low Grade C, treated woods, such as decking, treated fencing, chip board, window frames, sleepers (usually treated to last longer in exposed environments, painted, or contained glues, as in the case of chipboard).