If you’re dealing with cold rooms, higher energy use, or retrofit work that hasn’t quite delivered, the cause is often heat being lost through the building fabric.
A thermal heat loss survey gives you clear, real-world evidence of where heat is escaping and how severe the problem actually is.
Instead of assumptions based on drawings, EPCs, or visual checks, you get data you can rely on to make the right decisions first time.
At AVT UK, we carry out thermal heat loss surveys using Heat3D. This gives you a clear picture of building heat loss before money, time, or compliance deadlines are put at risk.
What A Thermal Heat Loss Survey Actually Is (And What It Is Not)
A heat loss survey looks at how heat is moving through the fabric of your building — including walls, roofs, and floors.
Using Heat3D, the survey maps heat loss across entire surfaces and measures real performance. This helps you to see where heat is escaping and how significant that heat loss is. This shows how the building is behaving in practice, rather than how it was intended to perform on paper.
It’s also important to be clear about what this service does — and what it doesn’t.
A thermal heat loss survey focuses specifically on heat passing through the building fabric. It doesn’t measure uncontrolled air leakage or assess ventilation performance.
At AVT UK, we also provide the other tests needed to understand overall building performance.
- Air tightness testing looks at how much air is leaking in and out of your building.
- Pulse testing helps pinpoint where that air leakage is happening.
- Ventilation testing checks that fresh air is moving through the building properly.
Each test answers a different question. Used together, they give you a complete, accurate picture of how your building really performs.
What A Thermal Heat Loss Survey Actually Is (And What It Is Not)
A heat loss survey looks at how heat is moving through the fabric of your building — including walls, roofs, and floors.
Using Heat3D, the survey maps heat loss across entire surfaces and measures real performance, helping you see where heat is escaping and how significant that loss is. This shows how the building is behaving in practice, rather than how it was intended to perform on paper.
It’s also important to be clear about what this service does — and what it doesn’t do.
A thermal heat loss survey focuses specifically on heat passing through the building fabric. It doesn’t measure uncontrolled air leakage or assess ventilation performance.
At AVT UK, we also provide the other tests needed to understand overall building performance.
- Air tightness testing looks at how much air is leaking in and out of your building.
- Pulse testing helps pinpoint where that air leakage is happening.
- Ventilation testing checks that fresh air is moving through the building properly.
Each test answers a different question. Used together, they give you a complete, accurate picture of how your building really performs.
How Our Heat Loss Surveys Compare to Basic Thermal Imaging
You may have seen a basic thermal imaging survey before. Typically, this involves a thermal camera being used to take images of selected areas. This highlights where surfaces appear warmer or colder.
That can be helpful as an initial check — but if you’re trying to make decisions, it often leaves you with more questions than answers. Thermal images alone don’t tell you how much heat is being lost, whether it’s significant, or where you should prioritise work. Results can also vary depending on conditions and interpretation.
A thermal heat loss survey using Heat3D is designed to give you full clarity.
Who Our Thermal Heat Loss Surveys Are Designed to Help
A building heat loss survey is used when you need reliable information about where heat is escaping and how significant the issue is. This is vital information when planning your next steps.
A wide range of people and projects benefit from our Heat3D heat loss surveys, including:
Retrofit & PAS 2035 Projects
If you’re overseeing retrofit work, you need to be confident that changes to the building fabric are making a real difference — both on paper and in use.
A thermal heat loss survey helps you understand how your building is performing before works begin. This means that decisions around insulation, detailing, and sequencing can be grounded in how the building actually behaves.
After works are complete, the same survey provides a clear way to check whether fabric upgrades have improved performance in the areas that mattered most.
This is particularly useful where comfort issues persist, results don’t match expectations, or further work is being considered.
By showing where heat is escaping, a heat loss survey gives you a clear picture of how the building is performing. This makes conversations between designers, coordinators, installers, and clients clearer and more productive.
It helps reduce uncertainty, target follow-on work more effectively, and demonstrate that retrofit measures are delivering meaningful outcomes.
Developers & Builders
If you’re delivering a project to a specification, you need confidence that the finished building is going to perform as expected once it’s occupied. If it doesn’t, issues tend to surface later — during snagging, handover, or after people have moved in — when they’re harder and more expensive to resolve.
A thermal heat loss survey helps you check fabric performance early, while there’s still time to act. It shows how walls, roofs, and floors are performing in practice, highlighting areas where heat loss is higher than expected or where detailing may need attention before the project moves on.
This can reduce late-stage snagging, minimise disputes around performance, and help avoid repeat visits once the building is in use. It also supports clearer conversations with design teams and clients, giving you evidence to show how the building is performing and where any issues are coming from.
For developers and builders, a heat loss survey helps keep projects on track, protect reputation, and safeguard margins.
Energy Assessors & Consultants
When you’re responsible for assessing building performance and advising clients, the strength of your recommendations depends on having solid, real-world information behind them. A thermal heat loss survey gives you measured data on how heat is moving through the building fabric, helping you explain what’s happening in a clear and practical way.
Instead of relying on surface images or generic performance indicators, a heat loss survey allows you to show where heat is escaping, how performance varies across the building, and which areas are likely to have the biggest impact if addressed. This makes reports clearer, recommendations easier to follow, and conversations with clients more straightforward.
Where findings need to be shared with wider project teams or funding bodies, having measured heat loss data helps support decisions and reduces the need for interpretation. It also makes it easier to justify priorities and explain why certain actions are being recommended.
For energy assessors and consultants, a heat loss survey adds depth and clarity, helping you give advice that is practical, well-supported, and easier for others to understand and act on.
Housing Providers & Councils
When your residents are repeatedly reporting cold homes, high heating costs, or ongoing comfort issues over time, it can be difficult to know where to focus your energy and budget.
Carrying out wide-scale upgrades without a clear picture of what’s actually happening can be costly, disruptive, and frustrating for everyone involved.
A thermal heat loss survey helps you see where heat is escaping across the fabric of your building and which areas are contributing most to the problem.
This makes it easier to focus improvements where they will have the greatest impact — avoiding unnecessary work and making better use of available budgets.
It provides clear evidence of where improvements would have the greatest impact, helping you explain your decisions and justify investments.
Our heat loss surveys help housing providers and councils focus their efforts where they are most needed, making it easier to improve comfort for residents without wasting time or money.
Homeowners
Does your home always feel cold, or do certain rooms never seem to warm up properly? Are your heating bills higher than expected?
When you’re looking to make improvements, it can be hard to know what to tackle first. Without clear information, you risk spending money on changes that don’t deliver the comfort you’re hoping for.
A home heat loss survey helps you understand how heat is escaping from your property. It also pinpoints which parts of the building are contributing most to the problem. By showing how your walls, roofs, and floors are performing, you get a clear picture of what’s actually causing the heat loss.
This makes it easier to prioritise improvements that will make a noticeable difference to heat retention and energy bills, rather than relying on trial and error.
Whether you’re planning upgrades or just trying to work out what’s going on, a Heat3D thermal heat loss survey gives you clear, practical insight to help you decide what to do next.
What You Can Expect From Your Heat Loss Survey
When Should You Book A Heat Loss Survey?
Book Your Thermal Heat Loss Survey with AVT UK
If your home or building isn’t performing as expected and you want clearer answers before moving forward, we’re here to help.
Call 0161 706 1401 or send us a message online — we’ll respond quickly and help you decide whether a Heat3D thermal heat loss survey is the right place to start.