Work gets redone on construction sites constantly. Whether that redoing is a variation the employer pays for, or the correction of defective work the contractor pays for, is frequently left unresolved at the time and argued about at the end. Characterising it correctly is part of variation claim preparation.
The distinction is not about blame. It is about what the contract required, what was provided, and whether what was provided met the requirement.
The question the contract asks
Did the work as executed comply with the contract. If it did, altering it is a change and the employer pays. If it did not, correcting it is the contractor’s obligation.
That sounds simple and becomes difficult where the requirement itself is unclear, which is a scope question rather than a quality one.
It is also complicated where the work complies with the drawings and not with the specification, or with one and not the other, which takes you back to the priority of contract documents.
Where the argument usually sits
Workmanship that is within tolerance but not what the employer expected. Tolerances exist and work inside them complies, even where it looks unsatisfactory.
Performance that meets the stated requirement but not the purpose the employer had in mind, which on design and build can go either way depending on the contract.
And work that was correct when executed and has since been affected by something else, which is a third category and frequently misdescribed as a defect.
Each needs to be separated rather than argued as a general dispute about quality.
Opening up and testing
Most contracts allow work to be opened up for inspection, with the cost falling on the employer if the work proves compliant and on the contractor if it does not.
That mechanism is useful and underused. It resolves the question definitively rather than leaving it to argument about appearance.
Where it is used, the result should be recorded clearly, because an opening up exercise whose outcome nobody wrote down achieves very little.
Design and build changes the balance
Where the contractor carries the design, work that satisfies the employer’s requirements complies even if the employer would have preferred something else.
Conversely, work that does not satisfy those requirements is the contractor’s problem however closely it follows the proposals.
Employers frequently expect a traditional level of control over appearance and detail on a design and build contract, and that expectation is not usually supported by the documents.
The instruction that settles it
Where the employer wants something different from what the contract requires, the clean route is an instruction varying the requirement, priced as a variation.
Where the employer considers the work non compliant, the clean route is a notice or instruction to that effect, identifying the requirement not met.
What causes disputes is the third route: asking for the work to be redone without characterising it, leaving both parties to assume different answers.
Timing and practical completion
The characterisation becomes more important as completion approaches, because defects affect whether completion can be certified and variations do not.
Work reclassified as defective shortly before completion is a familiar pattern and deserves scrutiny from both sides.
So does work reclassified as a variation after it has been corrected, which is the same manoeuvre in the other direction.
Where the characterisation changes, the reason should be recorded. A change of view is legitimate; an unexplained change of label is not, and it is read accordingly.
What to record
The requirement relied on, quoted from the contract documents. What was provided, with evidence. The instruction or notice, with its date and its characterisation.
Photographs, inspection records and test results where any exist.
And the correspondence in which the point was first raised, because the way it was described at the time frequently settles how it is read later.
Latent defects and the long tail
Some defects appear long after completion, and the question of whether the work complied is then being asked about something nobody can inspect directly.
That is where the records made during construction do their most valuable work: inspection records, test results and photographs of work before it was covered.
Their absence does not prove non compliance, but it leaves the contractor arguing from assertion, which is a weaker place to be.
Dealing with it commercially
Raise the characterisation question explicitly when the work is first discussed. It is a short conversation at the time and a long argument afterwards.
Where the answer is genuinely unclear, say so and agree how it will be resolved rather than proceeding on incompatible assumptions.
Both parties benefit from clarity here. An employer paying for a variation it wanted is in a better position than one refusing a claim it will eventually lose, and a contractor correcting its own work promptly is better placed than one arguing about it for a year.
The middle category nobody names
A great deal of remedial work is neither a clean variation nor a clean defect. The work complied, the employer wants something better, and the contractor is willing to help.
Those arrangements are made informally and recorded nowhere, which is fine until the account. At that point one party calls it a variation and the other calls it making good.
A single line confirming what was agreed and who was paying removes the entire problem, and it is almost never written.
Where it ends up
In the final account, as a group of items where the parties disagree about characterisation rather than about value.
Those items are frequently the hardest part of an account to settle, because each one requires going back to what the contract required and what was provided.
Dealing with them as they arise is cost control and variations work. Where they have accumulated, they usually have to be unpicked alongside the rest of the account through final account dispute review.
Variations that have not been agreed?
Variation claim preparation sets out the instructed scope, the measured difference and the valuation built on the rule the contract actually provides, with the evidence attached to each line.