Embodied Carbon / Capex Materials Playbook (Advanced Cat 2)

A practical approach to embodied carbon: start with the biggest materials, improve specs, request EPDs, and track what you bought (not engineering advice)

Scope 3, Made PracticalPlaybook45 min

Important: This is operational guidance, not engineering advice. Coordinate with design and construction professionals for technical specifications.

What you'll accomplish

  • Understand embodied carbon in plain English (and why Cat 2 gets deeper here)
  • Start with a minimum viable embodied carbon approach (without perfection)
  • Identify which project types and materials matter most
  • Implement procurement-friendly steps: specs, submittals, and evidence
  • Build a repeatable "low-carbon capex" process over time

Who this is for

  • Construction/development and capex teams
  • Procurement teams sourcing materials and contractors
  • Sustainability teams improving Cat 2 quality beyond spend proxies

When to use this

Use this when:

  • you have meaningful construction/capex activity
  • you want to go beyond spend-based Cat 2
  • you want "real levers" to reduce embodied carbon, not just estimate it

Prerequisites

  • Cat 2 Starter Kit: Capital Goods (project inventory)
  • Contractor data request process
  • A place to store evidence (submittals, EPDs, specs)

Embodied carbon in plain English

Embodied carbon is emissions associated with:

  • making materials (cement, steel, insulation, etc.)
  • transporting them
  • installing them (sometimes included depending on approach)

It's "upfront" and often locked in when projects are designed and procured.

Beginner rule: Start with 3 materials that usually dominate: concrete, steel, insulation (plus major MEP equipment if relevant).

Step-by-step

Step 1 — Select project scope (don't boil the ocean)

Start with:

  • your top 3 capex projects by spend or size
  • or one repeatable project type (e.g., HVAC replacement program)

Step 2 — Build a minimum materials log

You do not need perfect quantities to start. Start with:

  • high-level quantities if available
  • or trade-level scope lists
  • or "key material decisions" to request documentation

Step 3 — Request EPDs and material documentation (only where feasible)

Use a vendor-friendly request:

  • "send existing EPDs if you have them"
  • "send product cut sheets and quantities"
  • don't demand new reporting on day one

Step 4 — Add embodied carbon requirements into specs (lightweight)

Examples of lightweight requirements:

  • "provide EPDs where available"
  • "submit product alternatives with lower impact options"
  • "document quantities and product IDs"

Step 5 — Track what you actually bought (submittals + evidence)

Embodied carbon programs fail when:

  • decisions happen, but procurement records aren't captured

Your evidence set should include:

  • submittals
  • purchase orders (if accessible)
  • invoices (if relevant)
  • EPDs/cut sheets
  • as-built summary (even high-level)

Templates

Template 1 — Project Embodied Carbon Starter Log

Project Embodied Carbon Starter Log

| Project | Site | Material/system | Product (if known) | Quantity (estimate ok) | Unit | EPD available? | Evidence link | Notes |
|---|---|---|---|---:|---|---|---|---|

Template 2 — EPD / Documentation Request Email

EPD / Documentation Request Email

Subject: Request: product documentation / EPDs (if available) — [Project]

Hi [Name],
For our project documentation and internal reporting, can you provide for [project]:
- product identifiers and cut sheets for key materials
- quantities (estimate is okay if final not available)
- any existing Environmental Product Declarations (EPDs), if you have them

If EPDs aren't available, no problem — please provide product specs and quantities.
Thanks,
[Name]

Template 3 — Low-Carbon Spec Checklist (starter)

Low-Carbon Spec Checklist

Low-Carbon Spec Checklist (Starter)

- Require product IDs and quantities in submittals
- Request EPDs where available
- Allow alternatives if functionally equivalent
- Document substitutions and approvals
- Store evidence in a consistent project folder

Template 4 — Submittal Review Log

Submittal Review Log

| Project | Submittal item | Decision (approved/alt needed) | Low-carbon alternative considered? | Owner | Evidence link | Notes |
|---|---|---|---|---|---|---|

Template 5 — Embodied Carbon Methods Note

Embodied Carbon Methods Note

Embodied Carbon Methods Note (Internal)

Projects included:
Materials prioritized:
Data sources:
- submittals
- EPDs (where available)
- quantity estimates

Limitations:
Improvement plan:
- increase quantity accuracy
- expand material coverage
- standardize spec language

Common pitfalls

  • Trying to require perfect EPD coverage immediately
  • No material quantities captured (can't improve)
  • Not involving construction teams early (requirements ignored)
  • Evidence not stored consistently → work cannot be repeated

Change log

v1.0 (2026-01): Latest release