Unsellable inventory at the yard: French carbon database purge locks out older building materials

On July 1, 2026, the six-month grace period granted by the Direction de l’Habitat, de l’Urbanisme et des Paysages (DHUP) and the INIES program expired [1, 2]. With it, the final tranche of environmental product declarations (FDES) established under the older EN 15804+A1 standard — those verified in 2021 and 2022 — was scheduled for removal from the INIES database, completing an archiving process that began on January 1, 2026 [1, 2].

For merchants, this is an immediate commercial hazard. If a manufacturer has failed to update a product’s environmental declaration to the newer NF EN 15804+A2 standard, that product’s verified data has now vanished from the software used for regulatory life cycle assessments (LCAs) under the RE2020 framework [6]. Contractors filing for new building permits can only enter such materials using penalizing default environmental values — a heavy handicap against ever-tighter carbon budgets.

Are you currently holding stock that your customers can now only specify at a carbon penalty? Which of your suppliers have failed to transition their data? How do you prevent your yard from becoming a graveyard of unsellable, non-compliant inventory?

The scale of the database purge is extensive, hitting core structural and masonry categories. On July 1, 2026, collective FDES for several high-volume materials were removed from the INIES database [2]. This list includes reinforced concrete beams, hollow blocks (B60 and B80), solid and perforated blocks (B80 or B120), road products, pull boxes, sanitation products, and smoke extraction ducts [2]. This follows the earlier removal of collective FDES for pre-stressed concrete beams on April 1, 2026 [2]. CERIB notes, however, that updated A2 declarations for the concrete beams, blocks and road products concerned are already in verification and due to be available before these dates [2] — so for many of these categories the practical task is chasing the new A2 registration numbers, not writing the products off.

The transition has been years in the making. The NF EN 15804+A2 standard amendment has been active in France since November 1, 2022 [5]. The DHUP and the INIES program originally scheduled the archiving of all older A1 declarations for January 1, 2026 [1, 2]. However, to support the ongoing implementation of the RE2020 environmental regulation, a six-month postponement was granted for FDES A1 verified in 2021 and 2022 [1, 2]. For older FDES A1 verified in 2020, the removal occurred on January 1, 2026, with a few extended to April 1, 2026 [1, 2].

Now, the safety net is gone. Any product relying on an archived A1 declaration loses its verified data in the RE2020 calculations [6]. If a contractor specifies a hollow block or a reinforced concrete beam that lacks an active A2 FDES, their LCA software falls back on default values that inflate the project’s carbon score. The merchant who sold that material faces returned stock and damaged customer trust.

This database purge coincides with a progressive, legally mandated tightening of carbon limits under the RE2020 framework. If a contractor buys a batch of hollow blocks, only to find during the RE2020 audit that the collective FDES was archived on July 1, 2026, the financial consequences are real [2]. The project’s carbon calculation deteriorates, the carbon budget may no longer close, and the contractor will hold the merchant responsible.

According to the Ordre des architectes, the maximum average carbon index value for construction (IC construction max moyen) for single-family or semi-detached houses is capped at 530 kg eq. CO2/m2 for the year 2025 [3]. This limit is scheduled to drop sharply to 475 kg eq. CO2/m2 in 2028, and will be squeezed down to 415 kg eq. CO2/m2 by 2031 [3].

For collective housing, the squeeze is equally severe. The 2025 cap stands at 650 kg eq. CO2/m2 [3]. This drops to 580 kg eq. CO2/m2 in 2028, and falls to 490 kg eq. CO2/m2 in 2031 [3].

To hit these shrinking targets, architects and contractors must calculate the carbon footprint of every component with absolute precision. They can no longer afford to use default environmental values, which carry heavy regulatory penalties in the LCA software. They need verified, highly accurate A2 FDES data. If a merchant cannot provide this data at the point of sale, the contractor will buy from a competitor who can.

The complexity for merchants is compounded by a rapid succession of legislative updates. The RE2020 framework has been phased in gradually since Décret n° 2021-1004 took effect on January 1, 2022, for residential buildings, followed by offices and educational buildings on July 1, 2022, and extensions on January 1, 2023 [7].

On March 18, 2026, Decree No. 2026-200 modified the energy and environmental performance requirements for metropolitan France [4]. This introduced a fourth version of the Construction and Housing Code, applicable to all projects with building permit applications submitted after May 1, 2026 [4]. Earlier in the year, Decree No. 2026-16 of January 15, 2026, established specific performance requirements for tertiary, industrial, and artisanal buildings, also applying to permits submitted after May 1, 2026 [4].

Furthermore, building permits submitted starting July 1, 2026, must incorporate regulatory adjustments following the Robin Rivaton evaluation report on the RE2020, which was prepared for the Minister of Housing in mid-2025 [4, 8]. The Rivaton report specifically addressed the impact of the EN 15804+A2 standard on the INIES database and recommended simplifying the life cycle assessment of concrete [8]. This recommendation directly connects to the removal of collective concrete FDES on July 1, 2026 [2].

A product that is acceptable for an extension project under older rules may be entirely non-compliant for a new-build collective housing project whose permit was submitted after May 1, 2026, or July 1, 2026 [4, 7]. Sales staff must ask contractors: “When was your building permit submitted?” and “What is the target carbon budget for this project?”

To protect margins and avoid holding dead stock, procurement directors must take immediate action.

First, cross-reference current stock of structural concrete, masonry blocks, road products, and sanitation components against the INIES database. Identify any products that rely on collective or individual FDES established under the archived A1 standard [2].

Second, demand the specific, verified NF EN 15804+A2 FDES registration number from suppliers [6]. If a manufacturer cannot provide this, prepare to phase their products out of your range.

Third, ensure that enterprise resource planning (ERP) systems and e-commerce platforms display the active A2 FDES data. Trade customers need to download these certificates instantly to feed them into their LCA software.

Fourth, when negotiating with manufacturers for future stock, insert clauses that guarantee compliance with the latest INIES database requirements. Make the provision of active, verified A2 FDES a condition of purchase. If a supplier’s data is archived, the financial risk of the unsold inventory must sit with them.

While the transition to the A2 standard presents an operational risk, it also offers a significant commercial opportunity. Merchants who move quickly can position themselves as the premier suppliers of low-carbon, fully compliant building materials.

The transition to the A2 standard changes how environmental impacts are calculated. The newer standard requires the inclusion of Module D, which accounts for the benefits and loads beyond the system boundary, such as recycling and reuse potential [5]. This allows manufacturers who have invested in circular economy processes to demonstrate significant carbon reductions compared to older A1 data [5].

By stocking and promoting these high-performance, low-carbon materials, merchants can command premium margins. Contractors are willing to pay a premium for materials that help them meet the strict RE2020 carbon thresholds without redesigning their entire building structure [3].

In the post-July 1, 2026 market, data is as critical as the physical product [1, 2]. A pallet of blocks without an active A2 declaration is not a discount opportunity; it is a liability the RE2020 software will only count at a punishing default value. The winners of this transition will be decided in the ERP system, not the yard.

[1] inies.fr — https://www.inies.fr/report-de-larchivage-des-fdes-etablies-selon-la-norme-nf-en-15804a1/ [2] cerib.com — https://www.cerib.com/report-de-larchivage-des-fdes-a1-sur-la-base-inies-jusquau-1er-juillet-2026/ [3] architectes.org — https://www.architectes.org/actualites/re2020-de-nouveaux-seuils-carbone-en-2025-2028-et-2031-91736 [4] rt-re-batiment.developpement-durable.gouv.fr — https://rt-re-batiment.developpement-durable.gouv.fr/textes-en-version-consolidee-a617.html [5] hirschisolation.fr — https://hirschisolation.fr/les-fdes-de-nos-isolants-polystyrene-mises-a-jour-en-version-a2/ [6] lafarge.fr — https://www.lafarge.fr/fdes [7] legifrance.gouv.fr — https://www.legifrance.gouv.fr/jorf/id/JORFTEXT000043877196 [8] ecologie.gouv.fr — https://www.ecologie.gouv.fr/sites/default/files/documents/10.07.2025_Rapport__Robin_Rivaton_RE2020.pdf