Defect: manufacturer, installer or contractor?
Preserve evidence and distinguish product defect, installation, design, maintenance and consequential damage before destructive repair.
Document triage — not legal/tax advice or a warranty decision. Données vérifiées: 2026-08-23.
VERT / GREEN
Photos, model, invoice, contract and timeline are available.
JAUNE / YELLOW
One problem can involve several parties; avoid selecting one cause too early.
ROUGE / RED
Before dismantling or discarding disputed material, preserve evidence and obtain appropriate authorization/advice when needed.
Checks
What the professional checks
- Distinguish product, installation and design defect
- Preserve evidence, causation and costs before corrective work
Official sources
Manage the project through closeout
V27
Project risks and overlooked interfaces
V27 connects payment, water, envelope, ventilation and jobsite details that often create costly surprises.