Standards & Compliance

EN 15804+A2, EN 15978, PCR selection and modularity rules — everything that decides which standard, which revision and which product category rules an EPD is built against.

6 articles

2026-05-1210 min read

Module D: beyond system boundaries — claiming the recycle credit correctly

Module D reports future benefits from recycling. End-of-waste criteria, secondary material quality, steel 90% vs plastic 30% examples.

2026-05-1211 min read

Filling the modulary table — 8 common mistakes that get verifier rejection

The most common mistakes when filling EN 15804+A2 Tables 8-11: MNR/MND confusion, module-chaining errors, GWP-fossil/biogenic imbalance, transport assumptions.

2026-05-1112 min read

EN 15804+A2 vs +A1: what changed in 2024 and why it matters

The A2 revision brought 7 new indicators, the GWP four-way split, Table 8 in place of Table 2, and stricter data-quality rules. A practical migration checklist from +A1.

2026-05-1110 min read

EN 15978 (buildings) vs EN 15804 (products) — which one when?

EN 15804 produces product-level EPDs; EN 15978 assesses an entire building. How do the two complement each other?

2026-05-1111 min read

PCR selection: which Product Category Rule is right for you?

EN 15804+A2 is the core PCR, but category-specific PCRs (EN 16783, EN 16757, EN 16908…) may be mandatory. How do you make the PCR selection decision?

2026-05-0814 min read

What is EN 15804+A2? A practical guide for product manufacturers

EN 15804+A2 (2019) is the mandatory European EPD standard for construction products. This guide covers indicators, the modulary table, MNR/MND, verification and end-to-end production with clca.