Passive Purple's EPD: The Low-Carbon Credential for Specifiers
Whole-life carbon is now central to how buildings are specified. On BREEAM, LEED and net-zero projects, architects increasingly need transparent, verified environmental data for every product they write into a specification. Passive Purple has a verified Environmental Product Declaration (EPD) to EN 15804 — giving you the low-carbon evidence you need, from an independent source.
What is an EPD? ♻️
An Environmental Product Declaration is a standardised, independently verified document that reports the environmental impact of a product across its life cycle. Think of it as a nutrition label for a building material: it sets out the carbon and environmental data in a consistent format that can be compared and used in whole-building assessments.
A Type III EPD — the most rigorous kind — is produced to international standards and checked by an independent verifier before publication. It is exactly the kind of transparent, third-party data that specifiers on green-building projects are asked to provide.
Passive Purple's verified EPD
Passive Purple has a verified Type III EPD, declaration EPD-IntelligentMembranes-249-EN, produced to EN 15804+A2 and ISO 14025. It was published by Kiwa-Ecobility Experts in Germany and is valid to 29.11.2027.
The headline figure specifiers ask for is the global warming potential:
- GWP-total = 2.38 kg CO₂ eq. per m² for module A1 (raw material supply), which is the dominant stage of the product's carbon footprint
- Declared unit: 1 m² at an application rate of 0.7 kg/m²
- Reference service life: 50 years
A 50-year reference service life matters: a membrane that lasts the life of the building doesn't need replacing, so its impact is spread across decades of performance rather than repeated cycles of removal and reapplication.
A product built to keep impact low 🌱
The EPD reflects a product and a manufacturing process designed with environmental performance in mind. Passive Purple is a water-based dispersion with no organic solvents, and several features keep its footprint down:
- Product waste in manufacture is just 0.5% — very little material is lost in production
- 100% green energy is used in production
- Packaging is 100% recycled polypropylene
- Dried material is disposable as non-hazardous waste at end of life
These aren't marketing claims made in isolation — they sit within a verified declaration produced to internationally recognised standards, which is precisely why they carry weight in a specification.
Why the EPD matters to specifiers 🛡️
On projects targeting BREEAM, LEED or net-zero outcomes, an EPD is often what unlocks credits and demonstrates due diligence on embodied carbon. Whole-life carbon assessments need product-level data, and an EPD provides it in a form assessors accept.
For architects and specifiers, having a verified EPD for Passive Purple means:
- Transparent, comparable carbon data to feed into whole-building assessments
- Support for low-carbon specification, backed by third-party verification rather than manufacturer assertion
- Help toward green-building points on rating-scheme projects
- Confidence at handover, with documented environmental credentials for the airtightness and vapour-control layer
Performance and low carbon together
Passive Purple already delivers airtightness and vapour control as a single liquid-applied layer. The EPD confirms that this performance comes with a transparent, independently verified environmental footprint — so you don't have to choose between a membrane that performs and one that supports your project's sustainability goals.
As embodied-carbon requirements tighten across the industry, having verified data ready to hand makes specification simpler and more defensible. Passive Purple gives you that data today.
Specify with the evidence behind you
The EPD sits alongside Passive Purple's airtightness, vapour, fire and emissions testing as part of a full, independent evidence base for specifiers.
Review the declaration and the rest of the documentation before you specify. See all Passive Purple test data & certifications, or view the product and its technical detail at Passive Purple.