What lifecycle stages does a timber EPD cover?

A timber EPD covers lifecycle stages defined as modules in EN 15804: A1 (raw material supply — forestry), A2 (transport to manufacturer), A3 (manufacturing — sawmilling, drying, planing), A4 (transport to site), A5 (installation), B1–B7 (use stage — maintenance, repair, replacement), C1 (deconstruction), C2 (transport to waste processing), C3 (waste processing), C4 (disposal), and D (benefits beyond system boundary — recycling, energy recovery). Modules A1–A3 are mandatory; others are optional but increasingly expected for construction products.

A timber EPD covers lifecycle stages defined as modules in EN 15804: A1 (raw material supply — forestry), A2 (transport to manufacturer), A3 (manufacturing — sawmilling, drying, planing), A4 (transport to site), A5 (installation), B1–B7 (use stage — maintenance, repair, replacement), C1 (deconstruction), C2 (transport to waste processing), C3 (waste processing), C4 (disposal), and D (benefits beyond system boundary — recycling, energy recovery). Modules A1–A3 are mandatory; others are optional but increasingly expected for construction products.

Why this matters

This question relates to EPD (Environmental Product Declaration) for Timber: How to Read It, which covers the broader topic in detail. Understanding this specific aspect helps architects, builders, and timber dealers make informed specification decisions.

For full context and additional technical detail, see our comprehensive guide:

→ EPD (Environmental Product Declaration) for Timber: How to Read It

Related questions

• What is an EPD for timber?
• How is biogenic carbon reported in timber EPDs?
• How do I compare EPDs from different timber manufacturers?

About this answer

This answer is part of the PuurModulair Knowledge Base — comprehensive timber specification guidance for architects, builders, and dealers across the UK, EU, and Scandinavia.