Non-conformance reports, explained for site teams.
An NCR — non-conformance report — is the formal record raised when work, materials, or processes do not conform to the specification, the drawings, an Australian Standard, or the project’s quality requirements. This guide covers when NCRs get raised, what a good one contains, how they differ from defects, and what closing one out properly looks like.
By Vincent Tripodi, Founder of SiteWarden · Updated 25 July 2026
What counts as a non-conformance
A non-conformance is any output that fails to meet a stated requirement: concrete that misses its specified strength, waterproofing installed without the specified membrane, work that skips a hold point in the inspection and test plan, or materials substituted without approval.
The trigger is the requirement, not the visible quality of the work. Work can look fine and still be non-conforming; that is exactly why the NCR exists as a formal record rather than a site conversation.
What a good NCR includes
An NCR is a record other people act on — the subcontractor rectifying it, the engineer approving a disposition, the client’s quality representative auditing it later. Vague NCRs create disputes; specific ones close.
A unique NCR number, the date, and who raised it.
The requirement that was not met: specification clause, drawing reference, standard, or ITP hold point.
A specific description of the non-conforming work with location and photos.
The proposed disposition: rework, repair, use-as-is with engineering approval, or reject.
Who is responsible for the rectification and the date it is required by.
Verification and sign-off once the disposition is completed.
NCR versus defect: same loop, different trigger
A defect is work that is faulty or incomplete — usually found on inspection walks and handled through the defect list. An NCR records a failure against a stated requirement and often carries a formal disposition process, including the possibility of accepting the work with engineering approval.
The loops overlap heavily: both need a structured record, photos, an owner, a rectification, and verified closure. Many items could be raised either way, and on most projects the NCR register and the defect list run side by side — NCRs for specification and process failures, the defect list for quality items found on inspection.
Closing the loop is what auditors check
An NCR register full of open items is worse than no register at all, because it documents known problems without documenting their resolution. Closure means the disposition was completed, verified, and signed off — with evidence.
The same discipline applies to the defect side of the loop. SiteWarden runs that side: inspection findings captured as structured records with photos and locations, assigned to the responsible contractor, verified before closure, and reported with the evidence attached. Whether an item entered the project as an NCR disposition or a walk finding, the rectification record is what protects the builder.
Non-conformance report (sometimes non-conformance record): the formal document raised when work, materials, or processes do not meet the specification, drawings, standards, or quality system requirements.
Who can raise an NCR?
Typically anyone in the quality chain: site engineers, supervisors, quality managers, superintendents, or client representatives. The project quality plan sets who reviews and approves dispositions.
What is the difference between an NCR and a defect?
A defect is faulty or incomplete work, usually found on inspection and handled through the defect list. An NCR records a failure against a stated requirement and carries a formal disposition — rework, repair, use-as-is with approval, or reject.
How is an NCR closed out?
The agreed disposition is completed, the work is verified against the original requirement, and the NCR is signed off with the evidence attached. An NCR without verified closure stays a live liability on the register.