DPP Delivery
All articles

GS1 GTINs and DPP: Why Product Identification Matters

· 8 min read · DPP Delivery
GS1 GTIN Product ID

Every Digital Product Passport needs to answer one fundamental question: which product is this passport for? That sounds simple, but for many Irish construction product manufacturers, it exposes a significant gap. Unlike consumer goods, construction products have historically relied on internal product codes, trade names, and catalogue references rather than globally unique, machine-readable identifiers. The DPP changes that.

At the heart of DPP product identification is the GTIN - the Global Trade Item Number - managed by the GS1 system. If you manufacture construction products and you are not yet registered with GS1, this article explains why you need to be, and how to get started.

What Is a GTIN?

A GTIN is a globally unique numeric identifier assigned to a product. You encounter GTINs every day - they are the numbers encoded in the barcodes on consumer products. The most common format is the GTIN-13 (the 13-digit EAN barcode used in Europe), though GTIN-8, GTIN-12, and GTIN-14 formats also exist for different purposes.

Each GTIN is unique worldwide. No two products from any manufacturer in any country share the same GTIN. This uniqueness is what makes them suitable for DPPs - when a DPP references a GTIN, there is zero ambiguity about which product it describes.

GTINs are part of the broader GS1 system, which provides standards for product identification, data exchange, and supply chain visibility across virtually every industry. GS1 operates through national organisations - in Ireland, that is GS1 Ireland, based in Dublin.

Why DPPs Need Machine-Readable Unique Identifiers

The DPP is not a PDF document that a human reads. It is a structured data record that machines access, process, and verify. For this to work, the product identifier must be:

  • Globally unique - no collisions with other products from other manufacturers.
  • Machine-readable - parsable by software without human interpretation.
  • Standardised - following an established system that all parties in the supply chain recognise.
  • Persistent - stable over time, not changing with internal system migrations or rebrandings.

Internal product codes fail every one of these tests. Your code “INS-PIR-100-FR” might mean something to your sales team, but it means nothing to a regulatory database, a BIM system, or a customs authority. Two manufacturers could easily use identical internal codes for completely different products.

The European Commission’s work on DPP implementation consistently references GS1 standards as the identification framework. The ESPR (Ecodesign for Sustainable Products Regulation), which provides the overarching framework for DPPs across sectors, explicitly recognises GS1 identifiers. The construction sector DPP requirements under CPR 2024 are expected to align with this approach.

A GTIN is a number. To make that number accessible on a physical product, it needs to be encoded in a data carrier - a machine-readable symbol that can be scanned or read.

Traditionally, GTINs were encoded in linear barcodes (the familiar striped barcodes). For DPPs, the relevant data carriers are:

GS1 Digital Link is the standard that connects physical products to their digital information. A GS1 Digital Link QR code encodes a URL that contains the GTIN and can resolve to the product’s DPP data. For example:

https://id.gs1.org/01/05391234567890

This URL contains the GTIN (05391234567890) in a standardised structure. When scanned, it can redirect to the product’s DPP, product information page, or any other digital resource. The same QR code can serve multiple purposes - a consumer might see marketing information, while a building inspector’s app retrieves the DPP data.

This is the direction of travel for DPP data carriers in construction. A single QR code on your product or packaging, encoding a GS1 Digital Link, becomes the gateway to the DPP.

RFID and NFC

For some construction products, RFID (Radio-Frequency Identification) or NFC (Near Field Communication) tags may be more appropriate than QR codes. Products that are embedded in structures (concrete elements, structural steel, insulation within wall cavities) may not have a visible surface for a QR code. RFID tags can be read through materials without line-of-sight.

GS1 standards support RFID encoding through EPC (Electronic Product Code), which maps to GTINs. The same GTIN that appears in your QR code can be encoded in an RFID tag, maintaining consistency across data carriers.

Data Matrix Codes

GS1 DataMatrix codes are another option, particularly for small products where a QR code would be impractically large. These 2D codes can encode GTINs and additional data (batch numbers, serial numbers) in a compact format.

How to Register with GS1 Ireland

Registration with GS1 Ireland is straightforward:

Step 1: Apply for a GS1 Company Prefix

Visit www.gs1ie.org and apply for membership. GS1 Ireland will assign you a GS1 Company Prefix - a unique number block that forms the basis of all your GTINs. The length of your prefix determines how many individual GTINs you can create.

Step 2: Assign GTINs to Your Products

Using your company prefix, you assign GTINs to each product that needs a unique identifier. GS1 Ireland provides tools and guidance for GTIN assignment.

Step 3: Maintain Your Product Data

GS1 Ireland operates product data services where you register your GTINs alongside core product information. Keeping this data current is important for supply chain partners and, increasingly, for DPP integration.

Cost and Timeline

GS1 Ireland membership operates on an annual subscription model. Costs depend on your company’s turnover:

  • Small companies (under EUR 500,000 turnover): typically around EUR 150-250 per year.
  • Medium companies: EUR 250-500 per year.
  • Larger companies: scaled fees based on turnover.

There is also a one-time joining fee. The registration process typically takes 1-2 weeks from application to receiving your company prefix. GTIN assignment to individual products can then happen immediately.

Compared to most DPP compliance costs, GS1 registration is modest. The return on investment extends well beyond DPP compliance - GTINs improve supply chain efficiency, enable e-commerce, and support integration with retail and distribution systems.

Granularity: What Level of Identification Do You Need?

This is where construction manufacturers often need guidance. Consumer goods have clear packaging units (a bottle of shampoo, a box of cereal), and each gets a GTIN. Construction products are more complex.

Per Product Family

At minimum, each distinct product type needs its own GTIN. Your 100mm PIR insulation board is a different product from your 50mm PIR insulation board. Each needs a separate GTIN and, consequently, a separate DPP.

Per Variant

If a product variant has different declared performance characteristics (different fire classification, different thermal conductivity, different strength class), it should have its own GTIN. The DPP for a B30 concrete block is fundamentally different from the DPP for a B50 block - they have different Declarations of Performance and potentially different environmental profiles.

Per Batch or Serial Number

Some DPP requirements may extend to batch-level or even item-level traceability. GS1 supports this through GTIN + batch number or GTIN + serial number combinations (encoded as SGTIN). This is particularly relevant for:

  • Products where performance varies by production batch (concrete, for instance).
  • Products containing substances of concern where concentration may vary.
  • High-value engineered products where individual traceability adds value.

The implementing acts under CPR 2024 will clarify the required granularity by product category. For now, establishing GTINs at the product variant level is a sensible baseline.

The Common Situation: Construction Manufacturers Without GTINs

If your company does not currently use GTINs, you are not alone. Many Irish construction product manufacturers have operated for decades using internal codes, distributor-assigned codes, or no standardised coding at all. Products are specified by name, description, and technical characteristics rather than by a scannable code.

This is understandable - construction products are not sold off retail shelves in the same way as consumer goods. They are specified by architects, ordered by contractors, and delivered to sites. The supply chain has functioned without GTINs.

But the DPP changes the equation. Machine-readable identification is not optional in a DPP framework. The sooner you establish GTINs for your product range, the easier DPP implementation will be.

Practical Steps If You Are Starting from Zero

  1. Map your product portfolio. List every product variant you manufacture and sell. Group them logically - you will need a GTIN for each distinct variant.

  2. Register with GS1 Ireland. Apply for membership and obtain your company prefix. Explain that you are preparing for DPP compliance - GS1 Ireland staff are familiar with the requirements and can advise on prefix length.

  3. Assign GTINs systematically. Create a product master data file that maps each product variant to its GTIN. Include the key attributes: product name, harmonised standard, essential characteristics, dimensions, and classification.

  4. Start applying data carriers. Begin adding GS1 Digital Link QR codes to product labels, packaging, and documentation. Even before DPPs are mandatory, having scannable product identification improves supply chain efficiency and customer experience.

  5. Integrate with your systems. Update your ERP, order management, and production systems to use GTINs as the primary product identifier. This integration is essential for generating DPP data at scale.

Looking Ahead: GS1 and the DPP Ecosystem

GS1 is actively involved in DPP development at European level. The organisation is working with the European Commission, industry bodies, and technology providers to ensure that GS1 standards underpin DPP identification and data carrier requirements.

For Irish construction manufacturers, this means that investing in GS1 now is not speculative - it is aligning with the direction that European regulation is taking. Your GTIN is not just a number on a label. It is the anchor point that connects your physical product to its digital identity, its Declaration of Performance, its environmental data, and its compliance record.

Getting this foundation right early makes every subsequent step in DPP implementation simpler and less costly. Register with GS1 Ireland, assign your GTINs, and start building the product identification infrastructure that DPPs will demand.