A1-A3 material only (building circularity)

One Click LCA
1

Hi, we are required from a client to show that (the exact wording): “80% or more of the embodied carbon in products and materials [A1 - A3] shall be in items that are designed for reuse” .
We feel that there is a misunderstanding on client’s part what reuse is. However is there a way to get a % figure of materials only at stage A1-A3 which are not destined for landfill?
Many thanks

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Hi Jana,

thank you for your question.

GWP emissions (80% of A1-A3 GWP emissions) are not assessed in the Building Circularity Tool. Therefore, I advise instead choosing a tool that

  1. calculates A1-A3 GWP-emissions
  2. allows the selection of the EoL-method, i.e. assuming that it will be reused.

An example of such tool is GLA/RICS.

I’d recommend the following workflow to achieve what your client requested:

  1. Input all the materials into the chosen tool.
  2. Select “Market-scenarios (user-adjustable)” in the LCA-parameters, as otherwise, you won’t have the option to select the EoL-method you want (“Reuse as material”).
  3. Set the EoL to “Reuse as material” for the materials where this applies.
    image
  4. Navigate to the results page and download the Excel report via “More actions” > “Detailed report”.
    image.
  5. Use the filtering options in Excel to only display A1-A3 emissions, and sum them up (100%).
  6. Filter out materials based on the EoL, so that you only see the materials that will be reused. Calculate the sum of A1-A3 emissions of materials that will be reused - and check if this is >80% of the value computed in the previous step.

I hope this is helpful to you. Please let us know if you have any further questions.