LDS Leak Detection Specialists Ltd        LDS Leak Detection Specialists Ltd

   Central Heating Leaks  

Thermography Inspections

  • Thermogarphy Inspections on new buildings compliant with Part L of the building regulations and BS-EN 13187.

  • Thermography Inspections to detect air leakage that is causing heat loss from older buildings improving energy efficiency in your home or business.

Thermographic scans detect temperature variations in the shell of the home or business, which helps determine whether air is leaking and heat is being lost. The most accurate thermography inspection device is a thermal imaging camera, which produces a 2-dimensional thermal picture of an area showing heat leakage. Thermography inspections are non-invasive and non-destructive: no walls, floors or ceilings need to be opened to perform the inspection.

Thermography Inspections detail the areas of concern such as insulation problems, Air leaks, poor workmanship, structural defects, missing insulation, damage due to mould, moisture and condensation

Reducing the amount of air that leaks in and out of your home or business is a cost-effective way to cut heating and cooling costs, improve durability, increase comfort, and create a healthier indoor environment.

Air Tightness and Thermal Imaging testing are important quality control measures when building or renovating a house. Heat losses in buildings can account for up to 50% of the total energy consumption and comes from air leakage through chimneys, attics, wall vents and badly sealed windows / doors. Adequate air exchange is essential for the occupants’ health and safety, but most buildings have a far higher rate of air exchange than is necessary. The root cause is often poor design and/or construction which allows air leakage from the outside to the inside of the building, or the opposite. The leakage pathway is often complex and, without thermal imaging, extremely difficult to visualize. This also allows the contractors to quickly identify and repair the problem areas to stop the energy loss immediately. All new buildings must meet air tightness requirements of the Building Regulations. By reducing air leakage, you will obtain a better comfort in the building. The building can also be heated more efficiently to conserve energy and save money.

Poor or inadequate insulation, moisture, building envelope leaks, and substandard work are costly to residential and commercial building owners. Thermographic Inspections can help you quickly see where energy efficiency can be improved.


Air leakage occurs when outside air enters and conditioned air leaves your house uncontrollably through cracks and openings. It is unwise to rely on air leakage for ventilation. During cold or windy weather, too much air may enter the house. When it's warmer and less windy, not enough air may enter, which can result in poor indoor air quality. Air leakage also contributes to moisture problems that can affect occupants’ health and the structure’s durability. Sealing cracks and openings reduces drafts and cold spots, improving comfort.


Thermography measures surface temperatures by using thermal imaging cameras. These infra-red cameras see light that is in the heat spectrum. Images on the camera record the temperature variations of the building's skin, ranging from white for warm regions to black for cooler areas. The resulting images help the thermographer determine whether insulation is needed. They also serve as a quality control tool, to ensure that insulation has been installed correctly. Thermographic scans in new buildings are also commonly used with air pressure testing, a blower door helps exaggerate air leaking through defects in the building shell. Infrared scanning allows thermographers to check the effectiveness of insulation in a building's construction and determine whether a building needs insulation and where in the building it should go. In addition to using thermography during an energy assessment, you should have a scan done before purchasing a house; even new houses can have defects in their thermal envelopes. You may wish to include a clause in the contract requiring a thermographic scan of the house. A thermographic scan performed by a certified technician is usually accurate enough to use as documentation in court proceedings.


Air infiltration contributes about 10% of the heat loss in a typical house built in the late 20th Century. Airtightness testing is a requirement of Part L of the Building Regulations unfortunately it does not identify the location of the air leaks that are limiting the airtightness. Thermal imaging can clearly show these leaks in a depressurisation test provided that there is a temperature difference of at least 5 oC at the time of the test, so the two are complementary. Thermal imaging is therefore a useful diagnostic tool in tests on new buildings, but it can also be used to detect air leakage that is causing heat loss from older buildings. Although a blower door is typically used to provide the pressurisation it is possible to use the effects of wind, which typically pressurises one side of a building that leads to air entry at low levels and exit at high levels in tall buildings.

Reasons for establishing the proper building tightness
  • Reducing energy consumption due to air leakage
  • Avoiding moisture condensation problems
  • Avoiding uncomfortable drafts caused by cold air leaking in from the outdoors
  • Determining how much mechanical ventilation might be needed to provide acceptable indoor air quality.


Preparing for a Thermography Inspection:
To prepare for an interior thermal scan, the home or business owner should take steps to ensure an accurate result. Drawings (plans and sections) and specification details regarding the areas to be surveyed should be supplied prior to the survey taking place. Furniture moved away from exterior walls and removing drapes. For the most accurate thermographic images you must ensure there is a minimum temperature differential between inside and outside the building of at least 10°C. This is usually achieved by leaving the heating system turned on inside the building for 12 – 24 hours prior to the survey.

LDS Thermographers
LDS Thermographers are certificated at all three levels by PCN, part of the British Institute of Non-Destructive Testing (BINDT). Our thermographers use their skill and experience to interpret thermal images and diagnose any anomalies in the construction, compliant with Part L of the building regulations and BS-EN 13187. LDS use leading-edge infrared technology from FLIR to perform thermography inspections of homes and buildings to improve energy efficiency, thus leading to savings on energy costs.

LDS Thermograhy Inspection Survey Results
A full written report will be given presenting the survey data and the interpretation, compliant with Part L of the building regulations and BS-EN 13187 (The British standard for thermal imaging of buildings). This will report will contain:

  • A statement of the survey objective
  • The date and time of the survey
  • Environmental conditions prevailing at the time of the survey, such as wind speed/direction, internal and external temperature
  • The infrared technology used.
  • The site-specific survey methodology
  • Infrared thermograms with temperature calibration
  • Photographs of thermogram locations
  • An interpretation of the thermograms
  • the conclusions/recommendations drawn from the survey

Where remedial work is recommended it is important to conduct a repeat survey of that part of the building.

Thermography Inspection surveys are qualitative, they show locations of anomalies that are abnormal thermal features, and do not attempt to quantify the heat loss from the anomaly or building as a whole. It is possible to quantify some aspects of the survey, such as condensation risk or surface area of defects and to make approximate estimates of heat loss.

"Very helpful and hardworking" Luton.  "Very professional service, Thank you" Suffolk



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Thermography Cameras

Thermal Cameras

Thermography Inspections detail the areas of concern such as insulation problems, air leaks, poor workmanship, structural defects, missing insulation, damage due to mould, moisture and condensation.

 Thermal Imaging

Thermographic scans detect temperature variations in the shell of the home or business, which helps determine whether air is leaking and heat is being lost.


Central Heating Leaks

Central Heating Leaks

Central Heating Leaks

Central Heating Leaks

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Non -Destructive Leak Detection

We pride ourselves on being ‘The Best’ in the industry having a 99% success rate of locating hidden leaks. LDS Leak Detection Specialists Ltd offer a leak detection service providing a non-destructive solution to finding leaks in any pipe work in both domestic and commercial properties. LDS utilise specialist equipment coupled with our engineers technical expertise to locate hidden leaks quickly and accurately, saving both time and money. We have engineers all over the UK enabling us to provide a fast response and offer International Leak Detection Services.

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