EPD Guide

by Parq

LCA Modules & Stages 101

12 Articles
•Complete guide and resources

A1–A5, B1–B7, C1–C4… alphabet soup, meet spoon. This section breaks down life‑cycle assessment modules and stages with real‑world examples that finally make the “cradle‑to‑grave” process clear.

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Industrial Worker Inspecting Scrap Metal

Module D: Your EPD’s Second Life Credit

Manufacturers lose bids when they ignore the carbon story after demolition. Module D adds that...

Walker Ryan
5 min read
8/11/2025
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Construction Worker Looking at a Demolition Site

Module C: The End-of-Life Wild Card

Most teams sweat over raw-material data, then slap a generic “landfill” line on the last page of...

John Johnson
5 min read
8/4/2025
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Truck on road with factory in background

Master Modules A4 and A5 for Leaner EPDs

Months of plant data finally sit polished in a spreadsheet, yet your verifier still needs truck...

Eric Hansen
5 min read
8/4/2025
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Architect and engineer reviewing building material samples

Functional Unit and Reference Service Life: How to Keep Comparisons Fair

If you have ever argued about who makes the “greener” concrete panel, odds are someone’s functional...

Eric Hansen
5 min read
7/28/2025
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Building with HVAC System Visible

Module B: The Use Phase Carbon Hot Zone

Most EPD chats orbit raw materials, yet for many products the bigger climate bill arrives after the...

Eric Hansen
5 min read
8/19/2025
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Hands organizing scattered paperwork

Life Cycle Inventory (LCI): From Numbers to Results

Most EPD delays start long before the verifier opens your report. The bottleneck is Life-Cycle...

Walker Ryan
5 min read
5/5/2025
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Transport and factory

Module A: Upfront Carbon Decoded

Module A covers everything that happens before a product reaches the jobsite—extraction,...

John Johnson
5 min read
8/19/2025
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Gradle to grave illustration

Module B: The Use Phase Reality Check

Manufacturers often obsess over A1–A3 raw-material numbers yet forget that specifiers keep...

John Johnson
5 min read
8/18/2025
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Race between two manufacturers – one with data, one scrambling

Life Cycle Assessment: The X-Ray of Product Impact

A new contractor spec drops on your desk, and there it is: “Provide LCA data.” If the term still...

John Johnson
5 min read
8/6/2025
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Split image showing a calculator and datasets on one side labeled LCA and a stamped certificate on the other side labeled EPD, connected by a simple pipeline icon.

EPD Life Cycle Assessment in Plain English

Confused about how an LCA turns into an EPD, what “A1–A3” even means, and whether any of this...

Walker Ryan
5 min read
12/14/2025
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A clean schematic with two paths from raw materials to installation. One path stops at the factory gate labeled A1 to A3. The other continues to delivery and installation labeled A1 to A5. Both paths show icons for materials, trucks, and site tools.

EPD A1 to A3 vs A1 to A5

Trying to decide whether your next EPD should report A1 to A3 or A1 to A5? The answer shapes how...

Eric Hansen
5 min read
12/14/2025
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Spec sheet morphing into a checklist of sustainability icons

Four Environmental Impact Categories You Should Know

You poured months into perfecting a product, yet one missing number can still keep you off the bid...

Walker Ryan
5 min read
6/10/2025
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