Design Solution · Sustainability
Design Solution · Dream about it
Use LCA plus EPD data to quantify and reduce whole-life carbon across design options.
A life-cycle assessment multiplies material quantities (from BIM/Revit takeoffs) by Environmental Product Declaration data to quantify embodied carbon across stages A1-A5, B, C and module D. Comparing EPDs lets designers pick lower-carbon products and run iterative design options (e.g. four iterations for GLA submissions) to demonstrate reductions against a baseline.
Quantifying embodied carbon by multiplying BIM-extracted material quantities against EPD data across all lifecycle stages — A1-A5 through to module D — is the design-stage process that turns whole-life carbon from a narrative into a managed performance metric, enabling like-for-like comparison of structural and facade options and supporting the iterative design development that planning requirements increasingly demand. The approach is mature and well-supported by tools integrated with Revit and similar platforms, and EPD data coverage, while still patchy for some product categories, has expanded substantially in recent years. This record carries only claimed status and no verified project outcomes, though the methodology itself is codified in EN 15978 and BS EN ISO 14044, and multiple LCA software providers offer compliant workflows. The value is that EPD-driven LCA closes the gap between embodied-carbon aspiration and design decision: without it, material substitution choices are made on cost and precedent rather than on a carbon basis. The honest constraints are data quality and scope discipline: EPDs vary considerably in the assumptions underlying them — declared unit, system boundary, allocation method — and comparing EPDs from different databases or geographies without normalising for these differences can produce misleading results; module D (beyond boundary) savings in particular are frequently over-claimed. The GLA and RIBA reporting frameworks provide the scope boundary discipline; adherence to those boundaries, rather than cherry-picking favourable modules, is what makes iterative LCA a credible design tool.
#LCA #EPD #whole life carbon #RICS #OneClick LCA