Overview
ISO/TR 25080:2025 is a Technical Report that explains background, methods and worked examples for estimating the contribution of wood and wood‑based products to carbon stored in harvested wood products (HWP). It supports the framework in ISO 13391‑1:2025 by detailing the HWP coefficient concept, data needs, modelling approaches (tier 1–3) and treatment of long‑term storage pathways such as landfill and bio‑CCS. The report aligns with IPCC approaches for greenhouse‑gas dynamics of wood products and provides practical examples for organizations and national reporters.
Key topics
- HWP coefficient concept: definition as the proportion of product inflow that represents a net change in the HWP carbon pool.
- Tiered methods: overview of IPCC‑aligned approaches (tier 1, tier 2 and tier 3) to estimate HWP carbon dynamics.
- First‑order decay modelling: use of decay functions and product residence times to estimate outflows from the HWP pool.
- Data requirements: what is needed to calculate HWP coefficients (product delivery volumes, historical market trends, half‑lives, recycling rates).
- Recycling and market growth: how recycling flows and changing product markets affect HWP storage estimates.
- Landfill and other long‑term storage: tiered methods for carbon stored in landfills, bio‑CCS and non‑standard landfill considerations.
- Worked examples: step‑by‑step examples using national inventories, market data and organization‑specific data, with sensitivity notes.
Applications
ISO/TR 25080:2025 is practical guidance for:
- Carbon accounting and organizational greenhouse‑gas reporting for companies producing or using wood‑based products.
- Life cycle assessment (LCA) practitioners requiring consistent treatment of biogenic carbon in HWPs.
- Sustainability reporting (corporate and value‑chain level) where HWP contributions to carbon storage are disclosed.
- Forest‑product manufacturers, traders and brand owners estimating carbon storage from sold products.
- Consultants, auditors and regulators validating HWP calculations in claims, standards or policy frameworks.
- Researchers and national inventory compilers refining tier 2/3 methods or comparing IPCC approaches.
Practical value
- Provides operational methods and example calculations to implement the ISO 13391‑1 framework.
- Helps quantify long‑term carbon benefits of product choices, recycling strategies and landfill management.
- Enables consistent, transparent HWP reporting aligned with IPCC and ISO guidance.
Related standards
- ISO 13391‑1:2025 - Wood and wood‑based products - Greenhouse gas dynamics - Part 1: Framework for value chain calculations (normative reference).
- IPCC Guidelines on harvested wood products and national greenhouse‑gas accounting (background alignment).