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Lot inspection

Lot inspection


Lot inspection?

A lot inspection is a check by an impartial body of a specific, defined quantity of products (lot).

The purpose of lot inspections is to determine whether there is sufficient confidence that the characteristics of the products of that lot are in accordance with the established requirements.


Lot inspections are possible for products for which there is no BENOR or COPRO certificate, the producer does not have a certificate for the relevant product, or for which additional requirements have been imposed.

Lot inspections always concern a well-defined quantity of the product to be inspected. The entire lot must be available at the time of inspection.

The inspection is one-off and in principle only the final product is assessed. Thus, a lot inspection cannot provide guarantees concerning raw materials or a production process.

Standard Specifications 250 for road construction, applicable in the Flemish Region, lists the products (Table 3-0-1) for which lot inspections must be carried out. In the Brussels and Walloon Region, the rules for possible lot inspections must be determined in the framework of the tender documents (additional articles related to the standard contract documents, special clauses, …).


The requirements with which the product must comply are laid down in an ‘inspection document’. This is based on:

  • a standard;
  • a model or standard specification (e.g.: Standard specification 250, CCT Qualiroutes, TB 2015);
  • a special specification;
  • a technical regulation (PTV);
  • a written agreement.


If a lot meets the requirements, a ‘certificate of conformity’ is issued, indicating that there is a sufficient degree of confidence that the lot in question complies with the inspection document.

This certificate states:

  • the product;
  • the quantity;
  • the applicable identification;
  • the construction site.

If a lot does not meet the requirements, a ‘non-conformity report’ will be issued, indicating that the lot concerned has been inspected but is not in accordance with the inspection document. It clearly indicates which characteristics fall short.

A certificate and a non-conformity report are valid only for a single construction site.


The products presented are marked with a lot number. This is the first stamp. The lot is sampled and tested. If the results meet the requirements of the inspection document, the products are marked with the COPRO logo. This is the second stamp. The certificate is delivered to the party requesting the lot inspection, which in turn submits it to the client.


A lot inspection gives confidence that the product meets specific requirements, under the supervision of an impartial body.

Subject to approval and under the responsibility of the leading civil servant, lot-approved products may be used. In Flanders, lot-approved products may replace certified products.

How to recognise?

A lot-approved product can be recognised by the certificate of conformity and the identification of the product (marking with lot number and COPRO logo).


COPRO performs lot inspections for various construction products on behalf of the user or the producer.

All the provisions of lot inspections are described in the COPRO lot inspection regulations (PKRL), which you can download here.

COPRO also carries out lot inspections on precast concrete products commissioned by PROBETON. For more information we refer you to

How to apply?

Use the digital application form that you can download here.  

To get a unique attestation with batch inspectionFullfill the form →


  • the holder of the certification marksCOPRO(.EXE) logo:
    • COPRO for building products
    • COPRO.EXE for execution
    • NTMB for ecological and technical-natural materials NTMB Zorgsysteem
  • accredited by BELAC as inspection body (nr. 107-INSP), as products certification body (nr. 107-PROD) and as certification body for quality systems (nr. 107-QMS), BELAC 107 INSP BELAC 107 PROD BELAC 107 INSP - more information :
  • notified by Europe for CE-marking as notified body nr. 1137Logo CE-marking - more information :
  • recognised by NBN as sector operatorLogo NBN - more information :
  • recognised by BENOR npo as sector bodyLogo Benor - more information :
  • VLAREL certified by OVAM for the sampling of building materials and asbestos in heaps VLAREL - more information :
  • recognised by BUtgb as mandated certification instituteBUtgb - more information:
  • recognised by SKAO as a certificate body for the system certification of the CO2 Performance Ladder - more info:     Logo CO2 Prestatieladder