Radon is a national environmental health problem and is the second leading cause of lung cancer. The US EPA, Surgeon General, American Lung Association, American Medical Association, and National Safety Council recommend testing your home for radon because testing is the only way to know your home's radon levels.
The 4 Point Inspection is often a required inspection (properties 20+ years old) in order to obtain (or maintain) insurance coverage. The inspection requirements were designed by insurance companies in order to get a better understanding of the structure they are insuring.
A picture says a thousand words. Thermal imaging of buildings is a quick and non-contact exploration method showing the temperature distribution at the surface of an area at the property. Used to find deficiencies of water intrusion, hot and cold differentials and the overheating of specific components.