Biobased Building materials in the Dutch Environmental Database
The objective of this project is to address 3 key issues to facilitate introduction of bio-based building products:
- to increase the number of bio-based building products which are included in the Nationale Milieu database (NMD)
- to quantify and valorise of the negative CO2 emissions of bio-based materials in-line with the NMD-Milieu Prestatie Gebouw (MPG) methodology system
- to explore different options/scenarios to quantify re-use/recycling.
- Finally, recommendations for policy makers will be made to provide level playing field for introduction of CO2 neutral / negative biobased and circular building materials.
The Dutch Government targets to reduce CO2 emissions considerably in the coming years. The building and construction sector can contribute significantly to this goal by applying bio-based and circular building products. By using bio-based materials, biogenic carbon will be stored for as long as the materials are incorporated in a building and eventually in subsequent recycled products. This actually means a temporary negative Green House Gas (GHG) emission, thus creating space to reach climate goals.
The project targets to support the application of bio-based building materials by finding solutions for 3 different issues (see 2.3 Motivation) which currently hamper appropriate accounting of GHG-benefits of bio-based materials.
- The value of biogenic carbon fixation in bio-based building products is not made explicit. Incorporation in the NMD methodology would pose a way to make the value of carbon fixation explicit and make advantages visible to decision makers.
- The present lump-sum values for end-of-life scenarios presented in the NMD methodology set incineration for 80% of clean wood based building products, while reuse/recycling and landfilling are set at 5-15% and 5-10%, respectively. While reuse and recycling of (building) materials and products at the end-of-life are gaining importance.
- Many biobased materials are not included in the NMD. Addition of 14 missing key products to the NMD will support their selection in the building design process and accelerate the uptake of bio-based materials.
- General review of NMD methodology (M1-6)
- Biogenic carbon storage (M1-18)
o Quantification of biogenic carbon storage in bio-based building products (M1-6)
o Quantification of lifetime of bio-based building products (M1-6)
o Review of scientific approaches for accounting for biogenic carbon and its storage in bio-based products (M1-9)
o Develop approach to credit biogenic carbon storage in NMD methodology (M7-18)
- End-of-Life scenarios (M1-21)
o Review of scientific approaches and data for reuse/recycling (M1-9)
o Assessment technically possible end-of-life scenarios (M1-9)
o Assessment practically feasible end-of-life scenarios (M1-12)
o Collecting inventory data for a selection of bio-based materials and their references (M13-18)
o Draft updated lump-sum values for end-of-life of selection of bio-based building products / materials (M15-21)
- Conducting up to 14 baseline LCAs for uptake in NMD (M1-21)
o 4 Partners will have an LCA made for one of their products. 10 Additional companies who wish to make an LCA of their bio-based building product and enter in the NMD will be sourced (M1-6).
o Sending out LCI sheets to the participating companies to collect their data (M1-6)
o Explanation which data are needed towards companies (M2-6).
o Informing further interested parties that are willing to enter the project (10 LCA places to be filled) with information of the project (M4-M6).
- MPG example calculations (M9-21)
o MKI calculations for selection of products based on proposed new additions/revisions on the NMD methodology
o MPG example calculations based on MKIs based on proposed new additions/revisions on the NMD methodology
Reporting and meetings:
- Progress reports will be prepared each calendar year.
- Non-confidential results will be published in a public report at the end of the project.
- Project Committee meetings will held twice a year.
- Task meetings, both for the work on ‘Carbon storage and end-of-life’ as well as on LCAs, will be held at interval relevant for execution of the work.