Please help me understand why the 2021 Material Baseline Report shows a high GWP for composite lumber (400 kg CO2e) and mass timber (200 kg CO2e). When I think of wood, I would think the GWP would be a negative number or a carbon sink, right? See page 10 of the report. Link to Report: 2021 Materi…

Hi Kevin, I am unsure how standards set out EPDs in North America but within Europe, they have to report sequestered carbon separately from fossil carbon, which can then be aggregated into a global warming potential total. Within a life cycle assessment, if you are only reporting A1-A5 then the seq…

To add that there is lot of adhasives and glues on the composte lumber that pushes the emissions up quite a lot. If you want to check out and compare more options do sign up to One Click LCA Free Trial. You can find 1000’s of datapoints to check out ( https://www.oneclicklca.com/ ). BR, Johanna

Thank you for the responses! I’ve learned a lot and still have a long way to go.

CLF's 2021 Material Baselines Report - Questions

Materials

Luke-Lombardi (Luke Lombardi) August 9, 2022, 7:57pm 4

@Kevin_Conklin - more discussion on biogenic carbon in this thread. Also a very interesting and insightful presentation by @anthony.pak here.

Topic		Replies	Views
Carbon math fights - biogenic and fossil and LUC! Materials biogenic-carbon , epd	2	206	January 3, 2025
Embodied Carbon Intensity - Generic Data's LCA Data & Tools	6	756	December 7, 2021
CLT (kgCO2/m3) similar to CONCRETE (kgCO2/m3) ¿why? Materials concrete , co2 , clt	6	726	May 19, 2022
Carbon Storage Quantification LCA Data & Tools	7	867	July 8, 2022
Canadian industry-average GWP resources Materials concrete , steel	1	360	July 17, 2023

CLF's 2021 Material Baselines Report - Questions

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