We are very happy with the work. Harry was dead on time, quick, calm, and made things easier for us.
Nick Abercrombie, customer in Bath – Heat Loss Survey
From cold rooms and high bills to a clear plan – a Heat Loss Survey shows exactly where your home is losing heat and what to fix first.
Heat escapes a home through the fabric itself (conduction) and through air leaking out of gaps (convection). Thermal imaging shows the first, an air tightness test measures the second, and together they show where to act.
Our qualified thermographers survey inside and outside your property, then carry out a full air tightness test of the whole building. The results of both are set out in a report listing the issues we found and suggested actions to take. By implementing our findings, property owners can save money on future energy bills and reduce the building’s carbon footprint. See our FAQs below for more.
Why work with us?
Experience
Our team have thousands of home visits between them, so we know how to work quickly and respectfully in a lived-in home.
On a mid-20th-century Bristol semi that struggled to reach 17-18°C even with the heating on, despite double glazing and some loft insulation, our blower door test measured 10.87 m³/hr/m² @50Pa. Thermal imaging then found cold corners and thermal bridging, missing insulation in the party wall and loft room, and heat loss through single and stained glazing – giving the homeowner a prioritised roadmap rather than a guess.
Award-winning
Winner, Consultancy – 2025 Bristol Property Awards
Winner, Supply Chain Partner of the Year – 2025 Unlock Net Zero Awards.
Winner, Retrofit Assessor of the Year – 2023 Retrofit Academy Awards.
Highly Commended, Employer of the Year – 2023 Retrofit Academy Awards.
Speed
Project deadlines matter. We manage all data collection, modelling and reporting in-house – keeping your project moving without administrative delays.
We work to a standard two-week turnaround, with the majority of reports and certificates delivered well within that window.
Pricing
Cost depends on the scale and complexity of the project – from a single property to a large-scale portfolio.
Our rate card is reviewed regularly, so we’re confident you won’t find better value elsewhere. If you’ve found a lower quote for comparable work, let us know – we’ll match or beat it.
Support
Navigating the complexity of energy efficiency, decarbonisation, and building regulation updates isn’t easy.
We’ve worked hard to explain a range of topics related to heat loss surveys in plain English to help non-experts get the information they need.
Get Your Heat Loss Survey Quote Today
Looking for a fast and reliable heat loss survey in Bristol or the surrounding areas?
Contact us today for a free quote and to discuss your specific project requirements.
Thoughtful, fast-growing force in sustainable consultancy harnessing analytical theory to deliver multiple projects. Rightly gaining national recognition.
Judges, Bristol Property Awards 2025
Understanding Home Heat Loss Surveys: Your Questions Answered
What does a heat loss survey involve?
A heat loss survey combines thermal imaging and an air tightness test to show where heat is escaping from your home. Our thermographers survey inside and outside the property to find missing or poor insulation and thermal bridges, then a blower door test measures how much air leaks through the building as a whole.
Will a heat loss survey tell me what to fix first?
Yes – the report summarises the issues we found and suggests actions to take. For a Bristol semi that struggled to hold its heat, that meant quick, low-cost fixes such as sealing skirting boards and capping an open chimney flue, alongside larger issues like missing party wall insulation.
Why do I need an air tightness test as well as thermal imaging?
Thermal imaging shows heat passing through the fabric, but it can’t measure air leakage across the whole building. The blower door test gives a single measured figure for that, which you can compare with the range typical for existing UK homes of 7.5-15.0 m³/hr/m² @50Pa.
Can a heat loss survey help with damp, mould or condensation?
It can show cold spots and air leakage that contribute to them, but it isn’t a damp diagnosis on its own. Sealing a home without adequate ventilation can make condensation worse, so we recommend a ventilation check alongside. On the Bristol semi above, extract ventilation measured 9.34 l/s against a 37 l/s minimum, so ventilation had to be fixed before any airtightness work.
What happens on the day?
A qualified thermographer surveys the inside and outside of the property, then carries out the air tightness test with external doors and windows closed. Our team explain what they’re doing as they go, and you’ll receive a written report afterwards.
Is a heat loss survey the same as an EPC or a retrofit assessment?
No. An EPC estimates performance from assumptions about the property, whereas a heat loss survey measures how it actually performs. A PAS 2035 retrofit assessment is a broader process, with testing like this as one possible input.
How much does a heat loss survey cost?
It depends on the size and complexity of the property, so we quote each survey individually – get in touch for a free quote.
Can I get help paying for a heat loss survey?
In some areas, yes. Homeowners in Bristol, Bath and South Gloucestershire may be eligible for a Retrofit West voucher towards a home energy assessment that includes air tightness testing and thermal imaging, as on the Bristol semi above.
Need Heat Loss Survey Services?
Our friendly team is ready to provide expert advice for your project. Whether you need a free consultation to discuss your options or a competitive quote for our home heat loss survey services, we’re here to help.
