LEED Credits and Composite Decking: How an EPD Earns Points

Short answer: A verified Environmental Product Declaration earns points through LEED's Building Product Disclosure and Optimization credit, where a product-specific Type III EPD counts as one full product toward the threshold. Tarimatec's EPD S-P-07588 is verified by Tecnalia and registered with EPD International. An EPD is a disclosure, not a performance award.

You are assembling a materials submission and someone has asked whether the decking contributes anything. The honest answer is yes, in a narrow and specific way that is worth understanding precisely, because the difference between "this product has an EPD" and "this EPD earns us a point" is where most sustainability claims quietly fall apart under review.

Picture a Vancouver project team on a Thursday, working through the materials binder for a mixed-use building targeting LEED v4.1. Nobody in that room is moved by the word eco-friendly. They are counting products with compliant declarations, and every product either counts or it does not.

What an EPD is, in the terms the credit uses

An Environmental Product Declaration is a Type III environmental declaration, prepared under ISO 14025 and, for construction products, the core rules in EN 15804. That is not decoration. Type III means the declaration reports life-cycle impact data against a published set of product category rules and is independently verified before publication — as opposed to a Type I ecolabel, which is a pass or fail seal, or a Type II claim, which is the manufacturer speaking about its own product.

Tarimatec's declaration is EPD S-P-07588, verified by Tecnalia and registered with EPD International, the operator of the Environdec programme. The registration number is the point. It means a reviewer can find the declaration in a public registry rather than take a distributor's word for it, and that verifiability is the entire mechanism by which the document does anything for your submission.

The credit it actually contributes to

In LEED v4 and v4.1, the relevant lever sits in the Materials and Resources category, in the credit for Building Product Disclosure and Optimization: Environmental Product Declarations. The disclosure option is a counting exercise: you need permanently installed products from a qualifying number of different manufacturers that carry compliant declarations, and the products count at different weights depending on the strength of the declaration.

A product-specific Type III EPD — an externally verified declaration covering that manufacturer's own product, which is what Tarimatec holds — counts as one full product toward the threshold. An industry-wide or generic EPD counts as a fraction of one. That is the whole arithmetic, and it is why specifiers chase product-specific declarations rather than sector averages.

The same documents travel. BREEAM assessments lean on verified life-cycle data and environmental declarations in their materials sections rather than on marketing figures, and the Canada Green Building Council's LEED adaptations for the Canadian market recognise the same ISO 14025 and EN 15804 declarations. One verified document, several frameworks that know how to read it.

Being honest about what an EPD is not

Here is where this post parts company with most sustainability marketing. An EPD is a disclosure, not a performance award. It does not certify that the product is low-impact. It certifies that the impacts have been measured under agreed rules and published where anyone can read them, including the numbers that are not flattering. A product with a high carbon footprint and a verified EPD still has a verified EPD.

So the credit it earns is a disclosure credit. It is not a sustainability score, it does not make a board green by assertion, and if someone tells you an EPD proves a product outperforms its competitors, they have skipped the part where you compare the actual figures inside two declarations built on the same product category rules.

The corollary is fairer than it sounds to competitors. When another brand publishes a self-declared recycled percentage — the "95 % recycled" figure you have read on a dozen product sheets — that is a Type II self-declared claim, not a third-party-verified declaration. Those are different categories of evidence, and the difference matters in a submission. It does not automatically mean the product is worse. A board with a high recycled content and no EPD may well have a lower footprint than a board with a modest recycled content and a beautiful declaration. What it means is that only one of the two can be counted, filed and defended when a reviewer pulls on it.

The rest of the environmental file

Beyond the declaration itself, four things sit in the folder and each answers a different question:

• ISO 14001 — the environmental management system standard, held at the manufacturing operation. It speaks to how the plant manages its impact, not to what the board is made of.
• The AITEX VOC test, report 2023AN6040 — a pass on volatile organic compound emissions, which is the document an indoor air quality or low-emitting materials conversation eventually asks for.
• 33 % recovered composite re-used in production, per the EPD — 22.5 % plus 10.5 % by process. That figure is worth more than a larger number on a brochure precisely because it is inside the verified declaration rather than beside it.
• 5,000,000 kg of rice husk diverted — the agricultural by-product that would otherwise be burned or landfilled, bound into the board with PVC and limestone.

End of life matters too, and increasingly appears in credits. The board is a thermoplastic composite with no wood fibre in it, which is what makes it recoverable rather than only combustible at the end of a service life. Our sustainability page sets out the environmental file in full.

The credit-by-credit request list

Credit or requirement	What it asks for	What Tarimatec supplies	Document to request
LEED v4/v4.1 MR: Building Product Disclosure and Optimization — EPD, disclosure option	Permanently installed products with compliant declarations from enough manufacturers; a product-specific Type III EPD counts as one full product	Product-specific EPD, externally verified	EPD S-P-07588 and its registry entry with EPD International
Type III declaration conformity	Declaration prepared to ISO 14025 and EN 15804 under published product category rules	Both, with independent verification by Tecnalia	The verification statement inside the EPD
BREEAM materials assessment	Verified life-cycle data rather than self-declared figures	The same EPD	EPD S-P-07588
Environmental management	Certified management system at the manufacturing operation	ISO 14001	Certificate number, issuing body and scope
Low-emitting materials conversation	VOC emissions testing	AITEX pass	AITEX report 2023AN6040
Recycled and recovered content	Substantiated content figures	33 % recovered composite re-used in production, per the EPD (22.5 % plus 10.5 % by process)	The content section of the EPD, not a marketing sheet
End-of-life narrative	Recyclability and disposal route	Thermoplastic composite, recoverable at end of life	The end-of-life module in the EPD

How to use this without overclaiming

Three habits keep a submission clean. First, cite the registration number in the binder, so the reviewer verifies rather than trusts. Second, write the claim at the size of the evidence: the deck contributes one product toward the disclosure threshold, not "the deck is sustainable". Third, when you compare products, compare the numbers inside two declarations built on the same product category rules, and if the other product has no declaration, say that it has none rather than implying it performs worse.

That discipline matters more in Canada than the marketing suggests, because the same board carries European rather than Canadian test data elsewhere in its file. Tarimatec does not hold a CAN/ULC S102 flame spread test or a CCMC evaluation report today, which is a separate matter from the EPD but sits in the same binder; we set it out in full in our post on multi-family balconies and Canadian fire ratings. The rest of the documentation set we can supply is listed on our page for architects and specifiers.

Frequently asked questions

Does an EPD earn a LEED point on its own?

Not on its own. Under the Building Product Disclosure and Optimization credit for Environmental Product Declarations, the disclosure option counts permanently installed products carrying compliant declarations from a qualifying number of manufacturers. A product-specific Type III EPD counts as one full product toward that threshold, so the decking contributes to the credit rather than earning it alone.

What does Type III mean on an environmental declaration?

A Type III declaration reports quantified life-cycle impact data against published product category rules and is independently verified before publication, under ISO 14025 and, for construction products, EN 15804. A Type I ecolabel is a pass or fail seal, and a Type II claim is self-declared by the manufacturer. Only the Type III declaration is the counting unit that green-building credits are written around.

Is a 95 % recycled claim better than an EPD?

They are different kinds of evidence, not better and worse products. A self-declared recycled percentage is a Type II claim made by the manufacturer about its own product. An EPD is a third-party-verified declaration. A board with high recycled content and no declaration may still have a low footprint, but only the verified declaration can be filed, counted and defended in a submission.

Is Tarimatec's EPD recognised in Canada?

Yes, in the sense that matters. EPD S-P-07588 is verified by Tecnalia and registered with EPD International, and the Canada Green Building Council's LEED adaptations recognise ISO 14025 and EN 15804 declarations in the same way LEED v4 and v4.1 do. BREEAM assessments read the same document. Recognition of the declaration is separate from Canadian fire or code evaluation.

How much recycled material is in Tarimatec decking?

The EPD reports 33 % recovered composite re-used in production, made up of 22.5 % plus 10.5 % by process. The board also binds rice husk, an agricultural by-product, with PVC and limestone, and the manufacturer reports 5,000,000 kg of rice husk diverted. Take the content figure from the EPD rather than from any marketing sheet.

If you are building a materials binder this quarter, start with the declaration rather than the colour chart. Ask us for EPD S-P-07588 and the ISO 14001 certificate, explore the Tarimatec composite decking range, read our companion hospitality decking spec guide alongside our notes on the downsides of composite decking, and when the paperwork stacks up, request a project quote in CAD or order decking samples, which are paid and ship from Vaughan, Ontario in 5 to 10 business days.