Quality Assurance on Site: What a QA Regime Actually Involves
Spring & Co, Stockport. Construction & property consultants since 1992
A quality assurance regime on a construction site is the system that proves the work is right before it gets covered up. In practice that means an inspection and test plan for every element, named hold points where the job stops until someone has checked it, and a written trail showing each stage passed. It is prevention. A snagging list at the end is what you get instead when there was no regime at all.
Spring & Co has run quality assurance on construction and property projects across the North West and beyond since 1992, most often as an independent clerk of works acting for the client rather than the contractor. The failures barely change from one job to the next, and almost all of them share a cause: work got signed off by nobody, then buried. So here is what a real regime involves, what it produces on paper, and where it still tends to break.
What does a QA regime on site actually involve?
Four things, running at once. A standard to build to, a plan of what gets checked and when, someone independent doing the checking, and a record that survives the handover. Miss any one and the other three stop meaning much.
The standard is usually the contract specification sitting on top of the Building Regulations and, for the management system itself, ISO 9001:2015. Spring & Co is ISO 9001 accredited, along with CHAS and NEBOSH, so the way we run inspections is itself audited rather than taken on trust. The plan is the inspection and test plan, which I will come to. The independent checker is the clerk of works or the resident engineer, on site often enough to catch work while it is still open. And the record is the file of signed inspection reports that lets anyone, years later, see who checked what and when.
The part people underestimate is the timing. A QA regime lives or dies on being there at the right moment, while the work is still open and can be probed.
An inspection of rebar is worthless the day after the pour.
What is an inspection and test plan, and why does everything hang off it?
An inspection and test plan, or ITP, is an element-by-element list of every check a piece of work has to pass, agreed before the trade starts. It sets two kinds of stop. A hold point is a stage where work is not allowed to continue until it has been inspected and signed off. A witness point is one where the inspector is invited to attend but the work can proceed if they do not. The whole regime is really just the discipline of honouring those points.
Here is an opinion plenty of consultants will argue with. I will not accept a time-stamped photograph as evidence that a hold point passed. Some outfits now run quality through an app, with the trade uploading their own photos to close their own inspections, and it saves everyone site visits. But a photo shows the one thing pointed at, not the thing next to it that was wrong, and it cannot be probed or measured. If our inspector did not stand there and witness the hold point, it did not happen, and it gets reopened. That costs us visits. It has never once cost a client a floor coming back up.
If you want that discipline set from the first week of a scheme, our Clerk of Works and quality assurance team writes the ITP with the design team before a single trade is booked.
What paperwork does a real QA regime produce?
The point of the file is that a stranger can reconstruct the quality of the build years later without taking anyone's word for it.
| Document | What it is | When it bites |
|---|---|---|
| Inspection and test plan (ITP) | The element-by-element list of checks, hold points and witness points | Agreed before the trade starts, not after |
| Inspection and test records (ITR) | The signed evidence that each hold point actually passed | Filed as the work proceeds |
| Non-conformance report (NCR) | A formal record of work that failed a check | Raised the day it is found, closed only when corrected |
| Benchmark or sample panel | The first run of a repeated element, approved before the rest follows | Before brickwork, tiling or cladding goes into repeat |
| RAMS | The risk assessment and method statement for the task | Read and accepted before anyone starts |
| O&M manual and as-built records | The handover file: what was installed, where, and how to run it | At practical completion, and every day the building is owned after |
The benchmark is the row most schemes skip and most regret. Build one bay of brickwork or one tiled bathroom, get it approved, and every following one has a physical reference to match. Skip it, and you are arguing about acceptable quality after 40 rooms are done.
How much does getting quality wrong actually cost?
The Get It Right Initiative, a group of UK contractors and clients formed to study exactly this, put the direct cost of avoidable error at around 5% of project value, roughly £5 billion a year across the sector. Add the process waste, the indirect costs and the latent defects that surface later, and their figure rises to as much as 21% of project cost. Estimates of the total sit between £10 and £25 billion a year.
On a £4 million scheme, 5% is £200,000 of work done twice. A resident clerk of works for that build costs a fraction of it. It is why lenders increasingly insist on independent oversight before they release funds, which is what our independent project monitoring and auditing is for.
What did the Building Safety Act 2022 change?
It made the paper trail a legal duty for higher-risk buildings, and it put teeth behind it. Under the Act a higher-risk building is one of at least 18 metres or 7 storeys with two or more residential units. Those buildings now pass through the Building Safety Regulator, which sits inside the Health and Safety Executive, at two control gates known as Gateway 2 and Gateway 3.
The bigger shift for anyone running quality is the golden thread. The Act requires a single, current, accessible record of the building's safety-critical information, kept live from design through construction into occupation. The QA file stops being a thing you assemble at the end to hand over. It has to exist and stay accurate the whole way through.
A regime built on witnessing hold points and filing records as you go already produces most of that thread. One built on catching up at practical completion does not, and on a higher-risk building that is now a compliance failure rather than a quiet bit of bad practice. Where a scheme sits inside this regime, our CDM and health and safety role and the quality role run together, because they draw on the same records.
What makes quality assurance different on a Greater Manchester site?
Two things, mostly: the building stock and the weather. A lot of what we inspect around Stockport and central Manchester is conversion work, Victorian red-brick mills and warehouses turned into apartments and offices. On those jobs half the quality risk is in the structure you inherited, so the regime starts with condition surveys and opening-up inspections of existing fabric before any new work is planned against it. You cannot write an ITP for a wall until you know what the wall actually is.
Then there is the rain. A wet North West winter is a genuine programme risk for quality, because moisture is the enemy of finishes. Screeds and plaster have to dry to a measured moisture content before floor coverings or decoration go on, and in a damp Greater Manchester January that takes longer than the programme wants it to. Push a vinyl floor down over a screed that has not dried and it lifts. So a hold point that reads as pedantic in July, taking a reading before the floor layer starts, is the one that saves the job in January.
Where does a QA regime usually fail?
Not from bad inspectors. From good ones being overruled to keep the programme moving. The most common failure I see is a hold point waved through under pressure, first-fix services boxed in before they were signed off, a slab poured before the reinforcement was witnessed, because a gang was standing idle and someone made a call.
And I will admit we have been on the wrong side of it. Early on a repeat-heavy fit-out we let a tiling benchmark go unbuilt to keep a trade progressing, on the promise it would match the sample board. It drifted. We had grout lines and a sample that did not agree across two floors, and some of it came out. Nobody had witnessed the first bay against a physical standard, so there was nothing to hold the rest to. It taught me that the benchmark is not bureaucracy. It is the cheapest argument-ender on the whole site.
There is an honest tradeoff in all of this. A real QA regime slows the first fortnight and costs money before it visibly saves any, and clients feel that friction before they feel the benefit. My answer is the GIRI number. You are choosing between spending on prevention now or on rework later, and rework always costs more and arrives at the worst possible moment.
If you are planning a scheme in Stockport, Greater Manchester or across the North West and want independent eyes on the quality before things get covered up, talk to Spring & Co about construction management, or get in touch for an initial conversation.