Reuse of discarded yet still usable product, for the same purpose, by a different user.

This framework surpasses the famous 3R (Reduce, Reuse, Recycle). The nine strategies Refuse, Rethink, Reduce, Reuse, Repair, Refurbish, Remanufacture, Repurpose, and Recycle and Recover provide a clear and actionable roadmap for a circular transition. 

Strategies at the top of the hierarchy, such as Refuse, Rethink, and Reduce, are the most effective at increasing a construction project's circularity level. These strategies focus on avoiding or minimising resource use and waste from the project's conception.

That is why a clear hierarchy exists where higher-level R strategies are preferred, and lower-level strategies are deemed more linear. 

In the original 9R framework, the last strategy, Recover, is often considered non-circular since it consists of energy recovery from material waste incineration, which is why it was left out of the scope of this case study collection.

They are applied to the built environment sector here as part of the [Realdania ](https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.realdania.org/&ved=2ahUKEwiF74KezMyJAxUpUaQEHURhOOEQFnoECBYQAQ&usg=AOvVaw0o-XWvSka80KCHtCG6XDS3) project.

🏢 9R Framework

🏢 Reuse

The doors, windows, service installations, and even furniture are flexible compared to the building structure. If dismantled carefully, they can be reused elsewhere for the same or different purposes.

Repair and maintenance of broken or malfunctioning product, to enable continuation of its original function.



🏢 Repair

Refurbishing and/or modernising an older product, so that the improved version can be used in the product’s original function.


🏢 Refurbish

Using parts of a discarded product in a new product of the same function.

🏢 Remanufacture 

Using discarded products or their parts in new products with a different function.


🏢 Repurpose

 The strategies maximise their lifetime and give them a second life (e.g., take back strategies) when applicable.

🏢 Extending the lifespan of products and parts

Maintain, repair and upgrade resources while they are in-use.