TALAMANA · THE AI LITERACY MAP FOR ARCHITECTURE AND DESIGN · Studio Practice · AGE 18—20 · FACTUAL · EVOLVING
Counting carbon before you build
Embodied carbon is spent before a building is occupied, and it can be counted early.
The idea
Carbon is spent twice in a building. Operational carbon is the electricity and fuel it uses once occupied. Embodied carbon is the rest, in three parts: upfront — quarrying, cement kilns, steel mills, transport, the crane; use-stage — maintenance, repair, replacement and refurbishment over its life, modules B1 to B5 in the whole-life carbon standards; and end-of-life — demolition, transport, waste. As grids get cleaner and buildings get tighter, the embodied share grows. It can be counted early, from a massing and a material list, using databases of carbon per kilogram. The count is only as good as the list.
Why it matters
The decisions that set embodied carbon — structure, span, material, how much building there is — are made in the first weeks. A count that arrives at tender stage is too late to change anything.
See it in the studio
A student asks a model to estimate the embodied carbon of her hostel block. It returns a figure in kgCO2e per square metre with a confident paragraph. She asks what it assumed for the cement, the steel, the transport distance and the floor area. It assumed a European concrete mix, a generic steel, no transport, and a floor area it misread from her prompt. The figure was arithmetic done on a list she never wrote.
Watch for this
A single figure with no boundary. "Cradle to gate" counts up to the factory door; "cradle to grave" counts the use stage and demolition too; a figure that does not say which one is not usable. A count that stops at practical completion has left out every replacement the building will need — the façade at thirty years, the services at twenty — and the RICS whole-life standard puts those inside embodied carbon. Ask where the count starts and stops before asking how big it is.
Try it
Take one studio scheme. List its five heaviest materials by rough mass. Look each up in the ICE database, which is free for education. Multiply and rank. Then change one decision — a filler slab for a flat slab, fly-ash brick for fired brick — and see which line moves. You have just done what the early-stage tools do, and now you know what they assume.
Prove it
Explain the difference between embodied and operational carbon, name the three parts of embodied carbon and the boundary a count must state, and show one early-stage estimate where you can list every assumption behind the number.
How it works
An early-stage embodied-carbon tool multiplies quantities by factors. Quantities come from your massing — area, storeys, structural type. Factors come from databases: the ICE database began at the University of Bath and, in its 2026 educational release, covers more than 200 materials; Environmental Product Declarations give factors for named products; EC3, from Building Transparency, searches them. A learning model in the loop can read your drawings for quantities, pick factors and write the report. Wherever you gave it nothing, it picks a default and does not tell you. The surrogate-model card explains why a fast answer stays confident outside its range. The targets are moving too. The RIBA's 2030 Climate Challenge (version 2, 2021) sets embodied carbon for new UK offices below 750 kgCO2e/m² by 2030 against a business-as-usual figure of 1,400, and for schools below 540 against 1,000, counted to the RICS whole-life boundary. Indian factors differ — our cement, our grid, our brick — and Indian product declarations are a young programme. Because the databases, the tools and the targets are all being re-issued, this card is marked EVOLVING.
What this idea builds on
What this idea opens up
Sources
Open this idea on the map · The complete map · Logika · RBDS AI Lab, India · revised every edition.