Choose a contractor against the actual scope, relevant experience and the scope of applicable certificates. A company name or membership alone does not prove that the proposed team can manage a particular defect and method.
Check relevant experience
Ask for comparable projects involving the same asset type, method, exposure and access. Clarify the role played by the company and proposed project lead. Verify references with the client where possible. Check whether the team can cover diagnosis, preparation, quality control and handover.
Read the certificate
Dutch BRL 3201 distinguishes scopes for technical repair and protection and for structural repair and strengthening. Ask for the current certificate, holder, validity and scope, and check the record with KOMO or the certification body. A process certificate covers a defined system; it is not a project-specific design or an automatic guarantee of every outcome.
VCA and ISO 9001 concern named safety or management systems. Check their scope, location and validity; do not treat them as proof of competence in every repair method. Ask who makes structural decisions and approves changes. Apply the same selection criteria to all bidders and record why a contractor was selected.
See also compare quotes and specify repair work.
Assess experience, team and certificate scope separately, then match each to the commission.
Legend - 1. references · 2. team · 3. certificate · centre: evidence relevant to the commission
Sources
- Kiwa, BRL 3201 part 1, 2017, §§1.1-1.2 - Defines Dutch technical repair/protection certification scope; this is the 2017 edition. Source.
- KOMO, BRL 3201-02 certificate register - Lists structural repair/strengthening scheme and holders; check current certificates. Source.
- Bouwend Nederland/VBR, Kwaliteitsborging in betonreparatie - Trade association explanation of scheme scopes and surveillance. Source.
- Kennisportaal Constructieve Veiligheid, Uitvoeren van constructieve ingrepen - Explains competent structural roles and risks. Source.