Hold Points vs Witness Points: Who Signs Off and When
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What’s the Difference Between a Hold Point and a Witness Point?
A hold point stops the job. You can’t move past it until the nominated party — usually the builder’s site supervisor, a structural engineer, or a certifier — has inspected the work and formally released it. A witness point is a courtesy, not a roadblock: you notify the other party that you’ve reached that stage, give them a reasonable window to turn up and look, and if they don’t show, you keep working anyway.
That’s the whole difference in two sentences. Everything below is about what it actually means on a facade job — who gets to call something a hold point in the first place, how notification works when everyone’s flat out, and what it costs you when a hold point gets built over without release.
Who Decides What’s a Hold Point and What’s a Witness Point
Neither one is up to the foreman on the day. Hold points and witness points are set out in the project specification, or in the builder’s overarching quality plan, and they should already be sitting in your own ITP before the first opening goes in. If your ITP doesn’t match what the spec says, that’s a problem to fix before you start — not something to sort out mid-install when a supervisor tells you they were expecting to be called for something you didn’t flag.
In practice, the builder or superintendent nominates the points that matter most to them — the ones they’ll be asked about by their own client, their certifier, or their insurer down the track. As the installing subcontractor, you might also carry your own internal hold points on top of theirs, for details you know are high-risk or hard to fix once covered. Nothing stops you from being stricter than the spec requires. It’s being looser than the spec that gets you into trouble.
Status can also change mid-project. A detail that started as a witness point can get upgraded to a hold point after a defect turns up somewhere on the job, or after a run of poor workmanship gets noticed. If that happens, get the change in writing and make sure it actually reaches the crew doing the work — a hold point nobody told the installer about isn’t a hold point, it’s a trap.
Hold Point vs Witness Point: A Side-by-Side Comparison
| Hold Point | Witness Point | |
|---|---|---|
| Can work continue without sign-off? | No — the job stops until it’s released | Yes — you proceed even if nobody attends |
| Who sets it | Named in the spec or the builder’s quality plan, mirrored in your ITP | Same |
| What you do on reaching it | Stop work, notify, wait for release | Notify, give reasonable notice, then continue |
| Typical facade examples | Waterproofing membrane before cladding covers it, structural sealant before glazing is loaded, a fire or smoke-rated junction before it’s closed in, first-of-type installation on a repetitive detail | Flashing lap checked, packers and shims set before the sash goes in |
| If it’s missed | Rip-out, re-inspection, possible dispute — the cost usually lands on you | Note the notification and move on, nobody’s obligated to attend |
What Hold Points Look Like in Facade Work
On a window and facade job, hold points cluster around anything that gets covered up, loaded, or made permanent before anyone else can check it. The classic example is a waterproofing detail — a sill flashing or membrane lap that will be hidden the moment cladding or lining goes over it. Once it’s covered, proving it was done right means cutting something open again, and nobody wants to be the one explaining why that’s necessary.
Structural sealant is another common one. Structural glazing needs cure time before the unit can be loaded or wind-loaded, and a hold point here isn’t box-ticking — it’s there because loading it early can genuinely fail the joint. Fire and smoke-rated junctions around openings are usually held too, because once the wall lining goes back on, checking the seal means demolition.
You’ll also see a hold point on the first-of-type installation for a repetitive detail — the first window of a particular type on the job. The logic is simple: if the first one’s wrong, you want to know before you’ve repeated the mistake across forty openings, not after. Some builders run first-of-type as a witness point instead, especially on lower-risk details — it’s not a universal rule, so check what your ITP says rather than assuming.
What Witness Points Look Like in Facade Work
Witness points sit on details that matter, but that aren’t catastrophic if nobody’s there to see them and aren’t hidden the moment you finish — or where a photo and a measurement are enough to prove the work later even if it does get covered. Packers and shims set correctly before the sash is loaded is a common one. So is a flashing lap that’s easy to re-check from outside even after cladding goes on, or a fixing pattern that’s been used successfully on the same job before.
The test for a lot of facades work isn’t “does this matter” — most of it matters. It’s “can I prove this was done right after the fact without cutting something open.” If the answer’s yes, it’s a reasonable candidate for a witness point rather than a hold.
Notifying for a Hold or Witness Point in Practice
The mechanics matter as much as the label. For either point, you need to notify the nominated party with enough lead time that they’ve genuinely got a chance to attend — not a text sent five minutes before you’re covering it over. What counts as “enough” isn’t fixed; it depends on what’s in your ITP or subcontract, so check that rather than guessing.
Notify in writing, every time, even if you also mention it in the site meeting or shout it across the slab. A text message, an email, or a note in the site diary all work, as long as there’s a timestamp and it went to the right person. Verbal-only notification is the single most common reason a hold point ends up in dispute — it comes down to “I told him” against “he never told me,” and that’s not a fight you win on site.
For a hold point, don’t proceed until you’ve got release — and release should also be recorded, not just implied because nobody objected. Silence is not a sign-off. For a witness point, record that you notified them and when, then keep working if they don’t turn up. You’ve met your obligation the moment the notice went out; their attendance is their call, not yours to chase forever.
What It Costs You When a Hold Point Gets Built Over
This is where the difference between the two stops being academic. Build over a witness point that nobody attended and, provided you notified them properly, you’re fine — the record shows you did what you were supposed to do. Build over a hold point without release, and you’ve created a problem that’s expensive in every direction.
The most direct cost is rip-out. If a builder, engineer, or certifier can’t verify the work without opening it back up, you’re often the one paying to cut it open, redo whatever’s needed, and close it up again — on top of the original install. That’s material, labour, and program time you don’t get back.
Then there’s the argument about who’s liable, and it’s an argument you’ll lose more often than not. Without proof the point was released, you’re the party who skipped a required step. It doesn’t matter that the work underneath was actually fine — if you can’t show release, you’re carrying the risk that it wasn’t. That shifts the cost of any downstream defect back onto you, even defects that have nothing to do with the specific detail that was held.
It also costs you on the next job. A builder who’s been burned by a subcontractor building over hold points remembers it, and it shows up in how closely they supervise you next time, or whether they call you back at all.
Hold Points, Witness Points, and Your ITP
Hold points and witness points don’t exist on their own — they’re line items inside your inspection and test plan, which is the document that ties the whole install to a record you can hand over. If you’re not clear on what an ITP is or how one’s structured, start with What is an ITP in Construction?. If you’re setting one up for a window or facade package specifically, How to Build an ITP for Window & Facade Installation walks through structuring stages so hold and witness points aren’t an afterthought bolted on at the end.
Getting the ITP right up front is what makes the hold point / witness point distinction easy to manage on site, instead of something you’re re-litigating with the builder every time you reach one.
The Paperwork Side, Handled
Tagging hold and witness points correctly is a records problem as much as a site one — the notification, the release, and the photo all need to sit together, not scattered across a text thread and a site diary. WNDW records each stage with who ticked it and when, and a photo, so the evidence for each point sits with the stage. The hold or witness release itself is still recorded however your builder’s system asks. Have a look at ITP report generation.
Want to see what a finished one looks like? Here’s an example signed ITP, and what to look for in ITP software if you’re moving off paper.
FAQ
Can a foreman waive a hold point if the inspector is running late?
No. A hold point can only be released by the party named to release it. If they're late, you wait or you chase them — you don't proceed and note it later. Proceeding without release is the exact thing that turns a hold point into a dispute.
What happens if nobody turns up to a witness point?
You keep working. A witness point is a heads-up, not a checkpoint you need permission to pass. Record that you notified them and when, then carry on — the record of notification is what protects you, not their attendance.
Who decides whether something is a hold point or a witness point?
It's set out in the project specification or the builder's quality plan, and it should be mirrored in your own ITP before work starts. It's not something a foreman or site engineer gets to decide on the day.
Can a witness point become a hold point partway through a job?
Yes, if the builder or superintendent formally changes the ITP or QA plan — usually after a defect, a near-miss, or a run of poor workmanship on that detail. If that happens, get it in writing and make sure everyone on site actually knows the status has changed.
Does a hold point apply to the whole level or just one opening?
Whatever the spec says it applies to — sometimes it's a single detail on a single opening (like a critical flashing lap), sometimes it's every opening on a level before cladding starts. Don't assume; check the wording, because getting the scope wrong is as costly as missing the point entirely.