Tag

EN 15804

Every clca article tagged “EN 15804” — 14 technical pieces covering the topic from methodology, standards interpretation and practical application angles.

14 articles

2026-08-2210 min readCBAM

Eight fundamental differences between CBAM and LCA

Both compute emissions, but they do not answer the same question. System boundary, gases covered, allocation rules and verification regime all differ.

2026-08-0711 min readSectors

Timber LCA: biogenic carbon storage, sustainable forestry and end-of-life

The claim that timber is 'carbon negative' has to survive proper accounting. When stored carbon may be counted, and what happens at end-of-life.

2026-08-0410 min readSectors

Ceramics LCA: firing energy, thickness and heat recovery

One line decides ceramic impact: the kiln. What glazing, drying and thin-body technology actually do to the total.

2026-06-2410 min readCorporate Carbon

Turning EPD data into a Scope 3 inventory

The EPDs you hold are the best data source for a corporate inventory — if you map the right modules to the right categories. Practical mapping rules.

2026-06-1011 min read

Beyond GWP: why the other impact categories matter

Focusing on carbon can reverse some decisions. The real role of acidification, eutrophication, ozone, toxicity and resource depletion.

2026-06-0710 min read

Primary and secondary data: which to collect for which line

Modelling everything with primary data is neither possible nor necessary. The foreground-background split and allocating a data collection budget well.

2026-06-0610 min read

ISO 14046 water footprint: withdrawn water is not consumed water

Counting litres is not a water footprint. Scarcity weighting, the consumption-versus-degradation split, and regional sensitivity.

2026-06-0310 min read

Scenario analysis: how end-of-life assumptions decide the result

Nobody knows what recycling infrastructure will look like in fifty years. How to work with that uncertainty and report scenarios honestly.

2026-06-0110 min readISO Series

Cut-off rules: what you are allowed to leave out

No LCA models every flow. How cut-off criteria are defined, the mass-energy-environmental relevance triad, and the most common mistake.

2026-05-0814 min readStandards

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.

2026-05-0610 min readFundamentals

What is an Environmental Product Declaration (EPD)?

An EPD presents a product’s environmental performance in a standard format, independently verified. What it says, what it does not, and why buyers ask for one.

2026-04-2910 min readPlatform

How to choose LCA software: eight evaluation criteria

Comparing feature lists misleads. What actually decides it is database access, verifiability and fit with your workflow.

2026-04-1612 min readVerification

How is an Environmental Product Declaration (EPD) calculated?

The calculation behind an EPD is an LCA, but not a free one: the PCR dictates what you calculate and how. The flow from rule set to result table.

2026-04-1410 min readFundamentals

What is a product life cycle? The stages from cradle to grave

Every stage a product passes through from raw material to waste. What each stage covers, how they map to the EN 15804 modules, and where impact usually concentrates.

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