Documenting this credit can take time, since cost and exact percentages of post- and pre-consumer materials must be collected for each recycled item used. 

LEED requires the base materials budget to be consistent across all MR credits. The LEED Online credit forms help provide consistency across MR credits by applying the same data to multiple credits. Materials used to earn this credit cannot also be counted for MRc3: Materials Reuse, nor for MRc7: Certified Wood, but they can contribute to MRc5: Regional Materials and MRc6: Rapidly Renewable Materials.