eToolLCD follows the EN15978 standard for calculating recycling burdens and benefits. What this means in simple terms is:
If the building designer is hoping to understand the net benefits associated with recycled content in buildings products used for construction and refurbishment, they should report Modules A-C inclusive. In other words, reporting Modules A-C rewards the use of recycled content in new products.
If the building designer is hoping to understand the net benefits associated with recycling rates in the waste streams from refurbishment and demolition at the end of a products life they should report Modules A-D inclusive. In other words, reporting Modules A-D rewards design for deconstruction (high recycling rates in the waste stream).
The methodology that drive this approach is that only the net outflow of a product is considered in Module D. So if a material used in the buildings has a very high recycled content (when new) but a lower recycling recovery rate (in the waste stream) there will be negative net flow of material for secondary use from the system and a burden will be applied in Module D. If on the other hand a product has a low recycled content and a high recovery rate there will be a large positive net outflow of material for secondary use and a benefit will be applied in Module D.
Posted in: eToolLCD Methodology