Lifecycle & Embodied Carbon on Mohammad Movahedi

EC 100: Lifecycle Construction Embodied Carbon

Thu, 01 Oct 2026 00:00:00 +0000

Lifecycle Stages in the Construction Industry and Embodied Carbon Calculation

Welcome to this comprehensive mini-textbook on Whole Life Carbon (WLC) and embodied carbon calculation in the built environment. This course teaches how building life cycle stages—from raw material extraction through construction, operation, maintenance, demolition, and reuse—are formally categorized and mathematically linked to carbon accounting under international standards.

Whole Life Carbon Curriculum Pathway

Modular roadmap tracking international standards (EN 15978, ISO 21930, RICS) from extraction to circularity.

Lesson 01 WLC Baseline

Foundations & Standards Framework

EN 15978 & ISO 21930 modular stages, system boundaries, functional units, and GIA normalization.

Explore Lesson →

Lesson 02 Modules A1–A5

Upfront Carbon: Product & Site

Cradle-to-gate extraction, freight logistics, site diesel, and compounded material wastage equations.

Explore Lesson →

Lesson 03 Modules B1–B5

Use Stage: 60-Year In-Service Life

Component service lives (ESL vs RSP), MEP/facade replacements, and embodied vs operational trade-offs.

Explore Lesson →

Lesson 04 Modules C1–C4 & D

End-of-Life & Circularity

Demolition emissions, End-of-Waste threshold, Net Scrap accounting, and Module D avoided burdens.

Explore Lesson →

Lesson 05 LCA Pipeline

Practical LCA & Comparative Case Study

BIM data hierarchy, contingency markups, uncertainty ranges, and full 4-bay commercial building case study.

Explore Lesson →

EC 101: Foundations of Whole Life Carbon and the Standards Framework

Thu, 01 Oct 2026 00:00:00 +0000

Lesson 01: Foundations of Whole Life Carbon and the Standards Framework

Learning objectives

By the end of this lesson, you will be able to:

Differentiate between operational carbon, embodied carbon, upfront carbon, and whole life carbon with precise boundary definitions.
Map physical construction activities to the modular stages defined by BS EN 15978:2011, ISO 21930:2017, and the RICS Whole Life Carbon Assessment Standard (2nd edition, 2023) (Modules A0 through D).
Explain why embodied carbon accounts for an increasing percentage (up to 50–90%) of lifetime emissions in high-efficiency buildings.
Select and formulate standard functional units and normalization metrics ($\text{kgCO}_2\text{e}/\text{m}^2 \text{ GIA}$) across a defined Reference Study Period (RSP).
Distinguish between cradle-to-gate, cradle-to-practical-completion, cradle-to-grave, and cradle-to-cradle accounting boundaries.

Key concepts

1. The Carbon Imperative: Operational vs. Embodied Carbon

Historically, building sustainability focused almost exclusively on operational carbon—the greenhouse gas (GHG) emissions arising from operational energy use (heating, cooling, ventilation, lighting, and power) and water consumption during the building’s occupation [S08]. As building energy codes have tightened and electricity grids decarbonize via renewable generation, operational emissions per square meter have plummeted.

EC 102: Upfront Carbon

Thu, 01 Oct 2026 00:00:00 +0000

Lesson 02: Upfront Carbon — The Product and Construction Stages (Modules A1–A5)

Learning objectives

By the end of this lesson, you will be able to:

Formulate and compute the mathematical equations governing Upfront Embodied Carbon (Modules A1–A5) per BS EN 15978 and RICS standards.
Interpret Type III Environmental Product Declarations (EPDs) conforming to BS EN 15804+A2:2019, specifically distinguishing between $\text{GWP-fossil}$ and $\text{GWP-biogenic}$.
Calculate freight emissions in Module A4 using mass-distance logistics modeling, payload capacities, and transport mode emission factors.
Model the compounding effect of site material wastage rates in Module A5 on raw material extraction (A1–A3) and transport (A4).
Quantify on-site installation energy, site accommodation emissions, and construction waste disposal.

Key concepts

1. The Composition of Upfront Carbon

Upfront Carbon encompasses all greenhouse gas emissions released from the initial extraction of raw earth materials up to the practical completion of the building asset [S04, S06]. It comprises two primary life cycle stages:

EC 103: The In-Use Stage

Thu, 01 Oct 2026 00:00:00 +0000

Lesson 03: The In-Use Stage (Modules B1–B5) and Operational Interplay

Learning objectives

By the end of this lesson, you will be able to:

Differentiate embodied use-stage emissions (Modules B1–B5) from operational emissions (Modules B6–B7).
Model component replacement schedules across a 60-year Reference Study Period (RSP) using service life planning equations.
Apply the mathematical replacement step function $N_{\text{replace}} = \lceil \text{RSP}/\text{ESL} \rceil - 1$ to calculate cumulative B4 emissions.
Analyze in-situ carbonation in concrete and refrigerant leakage in HVAC systems within Module B1.
Calculate the embodied carbon payback period and evaluate the trade-off between embodied carbon investments and operational energy savings under a decarbonizing electrical grid.

Key concepts

1. Embodied vs. Operational Emissions in the Use Stage

Under BS EN 15978 [S01] and the RICS Whole Life Carbon Standard [S04], the building use stage (Stage B) spans all impacts occurring between handover (practical completion) and the final decommissioning of the asset. It divides into two operational modules and five embodied modules:

EC 104: End-of-Life

Thu, 01 Oct 2026 00:00:00 +0000

Lesson 04: End-of-Life (Modules C1–C4), Circularity, and Beyond the Lifecycle (Module D)

Learning objectives

By the end of this lesson, you will be able to:

Quantify emissions across all End-of-Life modules (C1–C4) per BS EN 15978 and RICS standards.
Define the End-of-Waste boundary that separates Module C3 waste processing from Module D circularity credits.
Apply the Net Scrap Formula under BS EN 15804+A2:2019 to prevent double counting of recycled content between Modules A1–A3 and Module D.
Balance biogenic carbon accounting from cradle to grave under the static $-1/+1$ international standard rule.
Formulate circular economy design strategies (such as Design for Deconstruction) that convert landfill burdens into secondary material credits.

Key concepts

1. Stage C: The End-of-Life Phase (Modules C1–C4)

When a building reaches the conclusion of its functional life, the deconstruction, sorting, and disposal activities are categorized within Stage C [S01, S04]:

EC 105: Calculation

Thu, 01 Oct 2026 00:00:00 +0000

Lesson 05: Practical Calculation Methodology, Benchmarking, and Case Study

Learning objectives

By the end of this lesson, you will be able to:

Execute a step-by-step Whole Life Carbon (WLC) calculation workflow from building information models (BIM) and cost plans to final compliance reporting.
Apply the five-tier carbon data hierarchy (from manufacturer-specific Type III EPDs to generic LCI datasets) to minimize data uncertainty.
Integrate design-stage contingency allowances and quantify methodological uncertainty ($\pm 15\%–30\%$) per RICS 2023 guidelines.
Benchmark building carbon intensity against LETI 2020/2030 and RIBA 2030 Climate Challenge targets.
Conduct a complete comparative whole life carbon assessment between a conventional structural frame and an optimized low-carbon hybrid mass timber alternative across Modules A1–C4 and Module D.

Key concepts

1. The Whole Life Carbon Calculation Pipeline

Translating design drawings into a certified Whole Life Carbon assessment requires a disciplined five-step workflow [S04, S05, S10]:

Lifecycle & Embodied Carbon on Mohammad Movahedi

EC 100: Lifecycle Construction Embodied Carbon

Lifecycle Stages in the Construction Industry and Embodied Carbon Calculation

Course Navigation and Lesson Path

Whole Life Carbon Curriculum Pathway

Foundations & Standards Framework

Upfront Carbon: Product & Site

Use Stage: 60-Year In-Service Life

End-of-Life & Circularity

Practical LCA & Comparative Case Study

EC 101: Foundations of Whole Life Carbon and the Standards Framework

Lesson 01: Foundations of Whole Life Carbon and the Standards Framework

Learning objectives

Key concepts

1. The Carbon Imperative: Operational vs. Embodied Carbon

EC 102: Upfront Carbon

Lesson 02: Upfront Carbon — The Product and Construction Stages (Modules A1–A5)

Learning objectives

Key concepts

1. The Composition of Upfront Carbon

EC 103: The In-Use Stage

Lesson 03: The In-Use Stage (Modules B1–B5) and Operational Interplay

Learning objectives

Key concepts

1. Embodied vs. Operational Emissions in the Use Stage

EC 104: End-of-Life

Lesson 04: End-of-Life (Modules C1–C4), Circularity, and Beyond the Lifecycle (Module D)

Learning objectives

Key concepts

1. Stage C: The End-of-Life Phase (Modules C1–C4)

EC 105: Calculation

Lesson 05: Practical Calculation Methodology, Benchmarking, and Case Study

Learning objectives

Key concepts

1. The Whole Life Carbon Calculation Pipeline