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Reception refusal for material defects: conditions and remedies

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By Edouard Hennin, Provisional reception expert Published on 27 May 2026 Updated on 27 May 2026 6 min read

1. Non-compliant versus defective materials

A key legal distinction. Non-compliant: the material delivered differs from what the contract or quote provides (cheaper tiling, less efficient glazing, different brand of taps). This is a contractual breach.

Defective: the material complies with the specifications but has an intrinsic flaw (crack, manufacturing defect, installation defect). Remedy against the supplier or contractor depending on the origin.

2. Proving non-compliance

The burden of proof lies with the buyer. Evidence to gather: (1) contract and detailed quote mentioning the planned material; (2) photo of the material delivered; (3) technical data sheet of the installed product (labels, markings); (4) ideally, a joint expert report by a sworn expert.

Without these elements, the refusal may be deemed abusive.

3. Refusal or major reservation?

If the non-compliance is substantial (material central to use, safety or performance), the refusal is legally defensible. Otherwise, prefer a major reservation in the minutes with a short replacement deadline and activation of the security deposit in case of non-performance.

To qualify the seriousness of the non-compliance and prepare the appropriate procedure, our team of experts intervenes, with a joint expert assessment if necessary.

Questions about non-compliant materials

Difference between non-compliant material and defective material?

Non-compliant = differs from what the contract provides. Defective = compliant but with an intrinsic flaw. Remedies differ.

Can the contractor replace a material with an equivalent?

Only with your prior written agreement. Without agreement, it is an enforceable breach of contract.