Defect

A defect is anything in a building that is not functioning as it was designed to function. The definition is deliberately broad: a dripping tap is a defect, a sticking door is a defect, a flickering light is a defect, a cracked foundation is a defect. The word does not imply severity, urgency, or cost.

The mechanism: clinical language makes action more likely. “Defect” sounds more formal than “that thing that’s been bothering me for a few weeks,” and the formality is the point. A homeowner who calls something a defect is more likely to log it, locate it specifically, and treat it as something that has entered a process. A vague annoyance stays a vague annoyance; a defect generates a record, which generates a decision.

The distinction matters at three moments. When briefing a contractor, the defect report describes what is happening (factual observation) without guessing at the cause; diagnosis is the contractor’s job. For urgency decisions, the 4P rule runs against the defect, not against your feeling about it. Over time, defects log against components and become the history that makes future maintenance decisions easier.

Sibling frame: fault (an in-service failure caused by use or wear) and defect of conformity (the legal term for a manufacturing flaw covered by EU consumer guarantees). Confusing the categories matters at warranty time: a defect of conformity within two years is the seller’s problem; a fault from normal wear is the homeowner’s.