EPD Guide

by Parq

LCA Modules & Stages 101

16 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.

All Articles

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
Read more
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
Read more
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
Read more
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
Read more
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
Read more
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
Read more
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
Read more
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
Read more
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
Read more
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
Read more
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
Read more
Generate an illustration for an article following this concept: EPDs in Whole Building LCA Whole-building LCA is where big carbon decisions get made. If your products show up as generic, the model assumes worst case and your spec odds sink. Product-specific, third‑party verified EPDs flip that script by feeding real numbers into the building model. Here is how to make your EPDs land correctly in WBLCA tools, avoid common traps, and turn transparency into bid strength without drowning your team in spreadsheets. Ensure that you use no text, as this illustration will be used on international translations of the article.. Use an illustrative style (e.g. isometic) and don't generate in a photorealistic style.

EPDs in Whole Building LCA

Whole-building LCA is where big carbon decisions get made. If your products show up as generic, the...

John Johnson
5 min read
1/17/2026
Read more
Generate an illustration for an article following this concept: Module D for 2026, decoded Most teams nail A1 to A3 and stop at demolition. Module D is the after‑credits scene that can turn end‑of‑life into measurable benefits. If 2026 bids expect circularity, not reporting D risks leaving value on the table. Ensure that you use no text, as this illustration will be used on international translations of the article.. Use an illustrative style (e.g. isometic) and don't generate in a photorealistic style.

Module D for 2026, decoded

Most teams nail A1 to A3 and stop at demolition. Module D is the after‑credits scene that can turn...

Walker Ryan
5 min read
1/4/2026
Read more
Generate an illustration for an article following this concept: EPD Modules C1 to C4 for 2026 End of life is where many products lose the plot. C1 to C4 decide what happens when your product leaves service, and those choices can swing results that influence specs, credits, and bids. Get these modules right and you turn a messy teardown into clear, defensible numbers that buyers trust. Ensure that you use no text, as this illustration will be used on international translations of the article.. Use an illustrative style (e.g. isometic) and don't generate in a photorealistic style.

EPD Modules C1 to C4 for 2026

End of life is where many products lose the plot. C1 to C4 decide what happens when your product...

Walker Ryan
5 min read
1/4/2026
Read more
Generate an illustration for an article following this concept: Module B 2026: B1 to B7 without guesswork Upfront carbon grabs headlines, but the use phase decides who wins the spec. Module B is where your product either sips energy and water or bleeds maintenance hours. Nail these declarations and you turn an EPD from paperwork into pipeline. Ensure that you use no text, as this illustration will be used on international translations of the article.. Use an illustrative style (e.g. isometic) and don't generate in a photorealistic style.

Module B 2026: B1 to B7 without guesswork

Upfront carbon grabs headlines, but the use phase decides who wins the spec. Module B is where your...

Toby Urff
5 min read
1/4/2026
Read more
Generate an illustration for an article following this concept: EPD Modules A1 to A5 for 2026 Specs ask for A1 to A5 and teams nod, then wonder what data actually moves the needle. Here is the plain‑English map of each module in 2026 so you capture the right numbers once, avoid rework, and remove surprises when the declaration is verified. Ensure that you use no text, as this illustration will be used on international translations of the article.. Use an illustrative style (e.g. isometic) and don't generate in a photorealistic style.

EPD Modules A1 to A5 for 2026

Specs ask for A1 to A5 and teams nod, then wonder what data actually moves the needle. Here is the...

Toby Urff
5 min read
1/2/2026
Read more

Related Topics

Generic

This is a generic topic for blog posts that aren't categorized yet....

Environmental Regulations & Laws Decoded

EU CPR, CSRD, UK PAS 2080, LEED v5! Acronyms everywhere! We translate legalese i...

EPDs & the Bottom Line

Show me the money! Dive into ROI formulas and pitch‑perfect sales playbooks that...

Browse All Topics

Explore all available topics and articles