Embodied carbon is now a number a flooring specification has to carry. RIBA 2030, LETI and a widening set of client net-zero policies ask the design team to account for the carbon locked into the materials, not just the energy a building uses. For engineered oak, the honest answer is genuinely good, and now we can put a verified figure on it.
Why the EPD is the only number that counts
An Environmental Product Declaration (EPD) is a third-party-verified, standardised statement of a product’s life-cycle impact, produced to EN 15804. For embodied-carbon calculations the headline is the A1–A3 figure, the cradle-to-gate carbon of producing the product. A figure without an EPD behind it is not defensible in a submission; a figure with one is.
What the Vermont EPD says
The Vermont engineered oak range carries a third-party EPD to EN 15804+A2 (IBU programme). Its cradle-to-gate result is an A1–A3 GWP-total of −8.74 kg CO2e/m2, carbon-negative at the product stage. The reason is the oak itself: the board stores roughly 16.5 kg CO2/m2 of biogenic carbon (4.49 kg of carbon), which outweighs the fossil carbon of manufacture. It is an unusually strong number for a finished floor finish.
The honest whole-life picture
It is worth being precise about what −8.74 means. It is the A1–A3 (product stage) figure used in embodied-carbon assessment. The stored biogenic carbon is reported separately and is released back at end of life, the EPD’s C-stage modules show that, so the floor is carbon-negative as produced, not in perpetuity. Quoting it as the cradle-to-gate number, which is what BREEAM and LETI assessments use, keeps the claim defensible.
How it compares
Against the alternatives, the gap is wide. PVC-based LVT and laminate are fossil-derived and sit clearly positive on A1–A3; engineered oak, drawing on a renewable, carbon-storing raw material with FSC (Winderen) or PEFC and FSC (Vermont) chain of custody, is the low-carbon choice in the hard-floor category. For a project chasing an embodied-carbon target, the floor finish is rarely the biggest line, but it is one of the easy wins.
A note on Winderen
The figure above is from the Vermont EPD. A product-specific EPD for the Winderen range is being finalised; until it is published we quote Winderen’s carbon on request rather than apply Vermont’s number to it. We would rather give you the figure that belongs to the product you are specifying.