A construction problem often starts small: a flashing installed after the cladding has already been fixed in place. A services penetration that isn’t fully sealed into the membrane. A specified product quietly swapped for a ‘similar’ alternative. Individually, these decisions may not raise concern. Over time, however, they can compound, and this may lead to leaks, performance issues, and costly remediation that no one anticipated at the design stage.
For architects and designers, this is the critical tension. Drawings and specifications capture your intent, but construction introduces variability through sequencing, interpretation, workmanship, and material behaviour, and this is where outcomes begin to shift.
Why design intent breaks down on site
Once a project moves into construction, any challenges that appear aren’t typically about whether the design is ‘good’, or not. They arise in the way that design gets interpreted and built in a live environment. It happens easily, and it’s common, as anyone who has been on site can testify. You’ve got multiple trades, sequencing pressures, partial information and decisions being made quickly to keep things moving. There are multiple minor negotiations of the details happening all at once, and something that originally looked very clear on paper, becomes less so when you’re dealing with three systems meeting in the same place, for example. It’s the nature of the work, design intent doesn’t always carry through. It requires active checking at the points where things are most likely to drift.
What effective observation actually involves
Good construction observation (also called construction monitoring) isn’t about covering the whole site, or being there all the time. Ideally, you plan well, and you’re targeted about getting visibility on the parts of the build that are:
- Easy to get slightly wrong,
- Difficult to fix later, and/or
- About to disappear behind linings, membranes or finishes.
Timing and frequency in the observation programme are both important, and observations need to be recorded in a way that makes it obvious what’s acceptable, what needs addressing, and what requires further input. This is often relatively minor things such as fixings installed slightly proud, or membranes left exposed during works. Many of these observations happen while work is still in progress, which keeps issues relatively simple to resolve, before they become embedded in the building.
At Maynard Marks we typically categorise observations from straightforward compliance (category A) through to items requiring correction, rework and reinspection, or design review (category D), so there’s no ambiguity about the outcome. We ensure we’re clear when external consultant review is required, for example if we have questions about the installation of a fire-rated wall, the Fire Engineer is alerted. We also use tools like Newforma to capture and track observations in real time, which helps keep things visible and moving. The system itself isn’t the point (we can work or integrate with any tool or system), but having that clarity and consistency behind the process is what makes the observations useful.
Where projects tend to fall short
Of course, most projects aren’t lacking observation altogether and it’s usually there in some form. However, in our experience, where things can come unstuck is in the detail:
- A review happening just after the critical moment has passed.
- Site walks staying quite high level, so the tricky junctions don’t get much attention.
- Observations noted, but not clearly tied to an outcome.
- Ambiguity around who is actually responsible for fixing something
Individually, these are small gaps, but they create just enough space for issues to sit unresolved or quietly repeat themselves.
Surveyor strengths
This is probably the point where building surveyors earn their reputation. It’s a role, and industry that attracts people who are comfortable focusing on small details for longer than most, and who will stop because something looks ‘almost right’ rather than clearly wrong. We are the first to say, we know it can come across as slightly pedantic, and it’s probably not always the most popular trait on a busy construction site.
However, this is where the value sits.
The building surveyor mindset is shaped by firsthand experience of what happens later on, when building components don’t perform the way they should, we see failure close up. We see the household dealing with repeated leaks, or an office where issues start to affect how the space actually works. Experienced surveyors soon see the patterns emerge: the details that tend to cause issues, the sequencing that trips projects up, and the ‘near enough’ moments that aren’t quite enough.
What independent review adds
On more complex projects, or where detailing is tight, having this kind of focused, independent review alongside your regular contractor QA and consultant input, adds real value. It brings a slightly different perspective to the project, one that leans towards long term performance and is comfortable pausing things briefly to check a detail properly. Occasionally, this also extends to identifying issues that require input from other specialists, for example where corrosion, fire performance, or alternative construction approaches need to be reviewed before work can proceed. This helps you to avoid misinterpretations and risks, and provides you (and your client) with a greater sense of control as to how the design is actually being built. As a RICS-regulated business, our work sits within a framework of established professional standards, which reinforces the rigour behind the observation process.
Practical takeaways
A lot of this comes down to fairly simple decisions made early:
- Line up observation with the points where work is about to be covered up.
- Give more attention to details that rely on coordination between trades.
- Make sure observations clearly say what needs to happen next.
- Be very clear about who is responsible for closing things out.
- Prioritise consistency, over trying to see everything.
You’ll note that none of the above actions are complicated. However, they are deliberate, and taken together, they create a much clearer line between what was designed, and what gets built.
We can help
If you’d like to discuss an upcoming project, particularly where an independent construction observation layer could add value, please get in touch.
Read more about our building surveying services here.
