What is Thermal Imaging?

What is thermal imaging or infrared photography?

All objects emit infrared energy (heat) as a function of their temperature. The infrared energy emitted by an object is known as its heat signature. In general, the hotter an object is, the more (thermal) radiation it emits. A thermal imager (or thermal camera) is essentially a heat sensor that is capable of detecting tiny differences in temperature. The device collects the infrared radiation from objects in the scene and creates an electronic image based on information about the temperature differences. Because objects are rarely precisely the same temperature as other objects around them, a thermal camera can detect them and they will appear as distinct in a thermal image.

How does thermal imaging help during a home or building inspection?

Help see where there may be water leaks:

Document working appliances:

Find uninsulated or poorly walls and ceilings:

Find potential infestations from pests such as ants, termites, bees, and other vermin:

Other uses include:
• Find potential issues with electrical circuits
• See that heating system distribution components are working
• See that radiant floor and ceiling heat is working
• Find potential issues with electrical circuits

Other considerations:
In order for effective thermal imaging to be performed, there needs to be at least a difference of 5 degree of temperature within the area being scanned or between the inside of the building and the outside.

Next steps:
Ask about adding thermal imaging to your home inspection; we can look at the entire house or only a certain area that you may be concerned about.

Always make sure that whomever does you thermal imaging is trained and qualified. John Howard is a Certified Residential Thermographer, and maintains his certification with regular refresher classes.