Defective construction work: how to recognise it and act
In the construction sector, malfaçons (defective work) can have significant consequences, both for the value of a property and for the safety of its occupants. Whether it involves a new build or a renovation, it is essential to know how to identify these defects and respond effectively.
What is a malfaçon?
A malfaçon refers to a construction defect resulting from a failure to follow good practice, applicable standards or the terms of the contract. It may be visible or hidden, and may affect the soundness of the building or simply impair its proper use.
The most common malfaçons include:
- Poor installation of finishes (tiling, flooring, paintwork)
- Abnormal cracks in walls or ceilings
- Waterproofing defects (water infiltration, poor insulation)
- Electrical or plumbing problems
- Installations that do not comply with standards
How can a malfaçon be recognised?
Certain signs should raise concern:
- Cracks that develop quickly
- Persistent damp in certain rooms
- Doors or windows that no longer close properly
- Finishes that are coming away
- Ineffective ventilation
A technical diagnosis by an independent expert such as AC Expertises confirms the nature of the defect and assesses its severity.
What to do in the event of a malfaçon?
- Identify and document the defect (photos, precise descriptions)
- Notify the contractor or builder by registered letter with acknowledgement of receipt
- Call in an expert to draw up a detailed technical report
- Check the applicable statutory guarantees:
- Garantie de parfait achèvement (guarantee of perfect completion, 1 year)
- Garantie biennale (two-year guarantee for equipment)
- Garantie décennale (ten-year guarantee for serious structural defects)
If no amicable agreement can be reached, court proceedings may be considered, supported by a specialist lawyer and a judicial expert assessment.
The importance of an independent expert assessment
Calling on an independent expert such as AC Expertises allows you to obtain an impartial, technical assessment of the situation. Our assignments can be carried out in an amicable or judicial context, depending on the circumstances of the dispute.
Need support?
Do not wait for the problem to worsen. Contact us for a reliable, prompt and recognised expert assessment.