Green Bids, Verifiable Claims: A Due-Diligence Guide to Turkish Concrete EPDs for U.S. Projects

A supplier's environmental claim is only as useful as the document behind it. In 2026, U.S. project teams are asking concrete suppliers for embodied-carbon data earlier and in more detail. The request is no longer limited to a sustainability appendix. It appears in bid forms, submittal registers, and owner specifications.

Why EPDs Became a Procurement Document

Green-building rating systems and corporate sustainability goals have turned environmental performance into a measurable criterion. LEED, Green Globes, and owner-specific carbon limits all need data that can be verified. An environmental product declaration, or EPD, is one of the few documents that can carry that data across a supply chain.

An EPD is not a brochure. It is a verified summary of a product's environmental impacts, prepared under a product category rule and published by a program operator. For concrete, the most relevant impact is often global warming potential, reported for a declared unit.

What a Concrete EPD Actually Declares

Most concrete EPDs report cradle-to-gate impacts for one cubic meter of concrete. Cradle-to-gate covers raw material extraction, transport to the plant, and manufacturing, typically modules A1 through A3. It does not automatically include transport to the project site, placement, curing, or end-of-life.

The declared unit matters. A mix with a higher strength class may carry a higher cement content and a higher global warming potential. Comparing a 4,000 psi mix to a 6,000 psi mix without adjusting for performance is not a fair comparison. The EPD should state the strength, the cementitious content, and the functional unit.

Comparing Turkish and U.S. EPDs Without Apples-to-Oranges

Compare four things before comparing carbon numbers. First, the declared unit and concrete strength. Second, the system boundary: cradle-to-gate, cradle-to-gate plus transport, or cradle-to-grave. Third, the electricity grid and allocation method used in the underlying life-cycle model. Fourth, the verification body and the EPD's validity date.

A Turkish EPD prepared for a plant in Istanbul may use the Turkish electricity grid. A U.S. EPD may use a regional grid. That difference is real, but it is not the whole comparison. Transport from Turkey to the U.S. must be added if the project boundary includes delivery. A cradle-to-gate EPD that omits freight is not wrong, but it is incomplete for a landed-carbon comparison.

Recycled Aggregates and the Chain-of-Custody Question

Recycled aggregate can reduce embodied carbon and divert waste from landfills. It can also change workability, absorption, and gradation. The environmental claim needs a chain of custody.

Ask for the recycled content percentage by mass, the source of the material, the testing performed, and the batch records that connect the claim to the actual shipment. A supplier that says recycled content without a mass-balance or batch-level record is asking for trust, not verification. For structural concrete, confirm that the recycled aggregate meets the project specification and has been tested for absorption, gradation, and durability.

Where Turkish Supply Can Genuinely Help a Bid

Turkish producers often have access to supplementary cementitious materials, optimized cement blends, and recycled aggregate streams. A well-documented EPD plus a lower-carbon binder can help a U.S. contractor meet a global warming potential limit on a project where local supply is constrained. Port proximity and consolidated shipping can also reduce logistics complexity.

The honest comparison includes freight. A lower-carbon mix from Turkey may still carry a higher delivered carbon footprint than a local mix if transport is included. The contractor should model both cradle-to-gate and cradle-to-gate plus transport, then compare within the same strength class and project location.

The Due-Diligence Request List

• Product-specific and plant-specific EPD.
• Product category rule and program operator.
• Verification body and verification date.
• Declared unit, strength class, and global warming potential for A1 through A3.
• Cement and supplementary cementitious material content.
• Recycled content by mass and chain-of-custody records.
• Transport scenario from plant to U.S. port and project site.
• EPD expiration date.
• Batch records and third-party test reports.

Request the EPD for the actual mix, not the company average. A company-average EPD can be useful for screening, but it is not a product-specific claim.

Red Flags and Greenwashing

Watch for a company-average EPD presented as product-specific. Watch for recycled-content claims without a definition or testing. Watch for global warming potential comparisons across different strength classes. Watch for an EPD that omits transport while the bid language implies a delivered-carbon comparison. Watch for expired declarations and unverified reports.

Greenwashing rarely announces itself. It usually appears as a number without a boundary, a percentage without a source, or a logo without a verification statement.

A Bid-Stage Workflow

At bid stage, request EPDs for the mixes under consideration. Put the EPD validity date and the recycled-content documentation into the submittal register. Model transport separately. Compare within the same strength class and exposure category. If the project pursues LEED or Green Globes, confirm which credits the EPD will support and what documentation the rating system requires.

Turkish supply can be a genuine asset in a green bid when the environmental claim is specific, verified, and complete. The carbon handprint is not a slogan. It is a documented reduction that survives comparison with local alternatives.