Why do we need materials passports?

To put circular economy (CE) into practice in the building sector. To bridge the information gap that is hindering recovery of value and re-use of building products. The products need to be developed with circularity in mind and the right information needs to be available to the right party when re-use decisions are being made. Right now that information is absent. Instead there is a strong focus on Life Cycle Analysis (LCA) type data which, while relevant, do not inform about re-use decisions.