Thermal Imaging reports
Infrared (thermal imaging) is an advanced, non-invasive technology that allows the inspector to show homeowners things about their homes that can’t be revealed using conventional inspection methods.  Ancillary inspection reports are just as important as the reports you generate for standard home inspections.  For something as specialized as a thermal imaging inspection, it’s critical that the information you present meets your clients’ needs for information they can use and act on.

The art of an IR inspection is to interpret the results as accurately and reasonably as possible such that your client is given actionable information in order to proceed with necessary repairs.  With that in mind, here’s a list of dos and don’ts:

An inspector should

  • Explain the limitations of thermal imaging, including the fact that, as with any type of inspection, it can’t predict future conditions.  However, a roof that is experiencing moisture intrusion which has been detected through thermal imaging will very likely lead to serious structural issues, if left unaddressed.
  • Explain the capabilities of thermal imaging and how it can benefit your clients.  Do you have marketing materials to give your clients that outline the various conditions that can be detected through infrared technology?
  • An infrared inspection can identify and document moisture intrusion, energy loss, and even unexpected hot spots.
  • In terms of energy loss, an IR camera can detect.
    • Heat loss and air infiltration in walls, ceilings, floors, windows and doors.
    • Damaged and/or malfunctioning radiant heating systems.
    • Broken seals in double-paned windows.
  • In terms of detecting moisture intrusion, an IR camera can locate:
    • water and moisture intrusion around penetrations and at the foundation and building envelope that could lead to structural damage and mold.
    • missing, damaged and/or wet insulation.
    • hidden roof leaks before they cause serious damage.
    • plumbing leaks.
  • IR cameras are equally effective at locating hot spots in the home, including:
    • Circuit breakers in need of immediate replacement.
    • Overloaded and undersized circuits.
    • Overheated electrical equipment and components.
    • Electrical faults before they cause a fire.
  • Additionally, based on the color gradients that thermal images provide, an inspector can locate:
    • possible pest infestation, as revealed by energy loss through shelter tubes left by boring wood-destroying insects;
    • the presence of intruders, such as rats, mice and other larger pests hiding within the structure and detected because of their heat signature that the IR camera captures; and
    • dangerous flue leaks, which can lead to carbon monoxide poisoning of the home’s residents.
    • Offer to re-inspect (for a fee) after repairs are completed.  This is the only sure way to determine whether the repair work undertaken by your client and/or his contractor has effectively addressed the issues that your initial thermal imaging inspection discovered.

Standard Images with Infrared Images

To make your report user-friendly, you should provide standard digital images side by side with your IR images.  This will give your clients an accurate point of reference for the IR data, which is essential for mapping out improvements and repairs.


Interpreting the Data

This is perhaps the most critical aspect of providing a solid IR report, and goes hand in hand with the limitations of thermal imaging, as well as the depth of your own training and experience.  Depending on the established baseline IR readings and the locations of the images, the results can either alert the homeowner to a critical repair needed – such as an electrical hot spot – or simply be an item that they need to keep in check – such as adding insulation at an exterior wall.


Thermal imaging equipment is expensive enough that not every inspector offers this type of ancillary inspection.  Nevertheless, those who use IR cameras for both ancillary inspections and as part of their standard home and commercial property inspections will testify that it’s become one of the more indispensable implements in their toolkits.