The presence of Radon may be had to tell, but it can be in a house you wish to buy or sell. It is a danger to your health. It is therefore important that certain tests be done to reveal how far the substance has spread, and how to get it neutralized. The expertise of these inspectors is thus needed at such buying and selling times.
They need to do their tests at the lowest levels of the house, such as the basement. It is critical to determine how long and when the test should be done. There is no effectiveness in a test shorter than two days. There should be no interference to the testing process.
They need to have certain equipment for such work. They normally come ready with them. It is important to know about these equipment, to determine which inspector is best up to the job.
They are either active or passive testing kits out there. Passive ones do not need electricity to work. All they need exposure to the air in the house. They will then go to the lab for analysis. Passive devices are good for short and long-term testing. They are quite affordable. They are also great at lowering the effects interference has on the results.
Active testing kits need electricity to work. They have radon monitors that are always recording, both the levels and amount. They are there to monitor the radon amounts and their decay products constantly, as time passes. They are capable of detection of irregular spikes of the radon levels. The inspectors shall then explain what those spikes mean. These will show you which parts of the results were spikes, and why they should not be factored in. Their reliability makes them the favorites.
To make sure that the results are not tampered with by the interferences, you need a device that shall not stop recording the levels as time goes. Motion detectors shall tell when there was some interference. They will also point out changes in the test conditions. The application of proximity detectors will tell if someone walked into the area. Those are some of the things that interfere with the results.
When you can tell more about the weather conditions, you will know how effective the test results shall be. By knowing the temperature readings, you will know if there was an intrusion. It is best if the windows and doors remain sealed.
As an act of good faith, there should be a non-interference agreement signed before inspectors start working. These are the things you need a home inspector and radon tester to make sure are in place before they begin doing their job.