Part L
Air leakage diagnostics
Finding where air escapes after a failed or borderline test, so it can be sealed before a retest.
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Testing & commissioning
Building thermography
A qualified thermographer carries out thermal imaging surveys that show heat loss, missing insulation, cold bridges and air leakage paths, and gives you a report with annotated thermal and visual images.
When you need it
Thermography is a diagnostic survey, not a Building Regulations requirement. It is used to check insulation and junctions during or after a build, to investigate cold or damp spots, and to plan retrofit work.
Reliable images need a temperature difference between inside and outside of usually at least 10°C, so most surveys take place between late autumn and early spring. External images are taken when the sun is not warming the walls, often after dark, and rain or strong wind can mean rescheduling.
What is included
Included
- Check of weather and temperature conditions before the visit
- Internal and external thermal images, as set out in your quotation
- Matching visual photographs for each thermal image
- Report explaining each anomaly and its likely cause
Priced separately
- Opening up to confirm hidden defects
- Insulation or remedial work
- Air leakage diagnostics under fan pressure, which is a separate service
- Damp or moisture surveys
Your written quotation confirms the exact scope, what is included and any limits for your building.
What you receive
A report with annotated thermal and visual images, an explanation of each anomaly and its likely cause, and the conditions at the time of the survey.
Sent as a PDF. We can send it to your building control body or agent on request.
Our reports and testing support the compliance process. Approval and completion decisions remain with your building control body: the local authority, a registered building control approver, or the Building Safety Regulator for higher-risk buildings.
How to prepare
- Address and building type
- What you want the survey to find out
- Heating on and running steadily before the visit
- Access to the rooms and elevations to be surveyed
- Furniture moved away from external walls where possible
Send what you have. Missing details will not stop an enquiry; we will tell you anything still needed.
How it works
Tell usChoose the service or describe the job.
Written quotationScope, deliverables and price, confirmed in writing.
We manage the workArranged and coordinated by RegulaBuild. Technical work is carried out by appropriately qualified professionals.
Your reportThe output named in your quotation, with any follow-up.
Questions
Can thermography be done in summer?
Rarely with useful results. Heat loss surveys need a large temperature difference between inside and outside, so most take place between late autumn and early spring.
Does a thermal image prove a defect?
Not on its own. It shows surface temperature patterns, and the report explains likely causes. Opening up or further tests may be needed to confirm them.
Can it find air leaks?
It can show air leakage paths, especially when the building is held under pressure with a test fan. That is part of our air leakage diagnostics service.
Often booked with
Combine them in one quote request
PAS 2035
Retrofit energy assessment
PAS 2035 whole-home assessments of condition, ventilation, occupancy and energy performance, as the starting point for planning retrofit work.
Energy certificatesView service
Part L
Air tightness testing
Pressure testing to measure air leakage against the design target, with a certificate for building control.
TestingView service
Where we work
Building thermography across England
Request a quote
Discuss building thermography
Start with this service and add anything else you need. If you are unsure, say so and we will advise.