Radon testing is an important procedure, since it is credited with being the second leading cause of lung cancer among smokers and the number one cause among non-smokers. When in the process of upgrading a house for a sale or safety measures, a home owner may be inclined to rely on the information from prior radon testing to confirm present levels. But the Environmental Protection Agency recommends a new radon test be conducted if the last one happened more than two years ago. 

Here are two other facts to remember when relying on old radon testing results:

Conditions of prior tests: When weighing the reliability of an older test there are two features to consider seriously. The first concerns the matter of where the previous test was held, as they are always to be conducted at the lowest livable level of a home, such as the first floor or basement. If the test was performed anywhere else, it's not trustworthy. Second, any significant structural or HVAC changes in the home would essentially negate the previous test entirely.

Who conducted the previous test: If a professional conducted a radon test of a home within the last two years and those records are still available, then you may be safe trusting that information. But if the last radon test was conducted with a DIY package, there should be some concern unless you performed that test yourself. If you elect to have a test conducted again by a professional, be sure that the person is qualified. Some home inspectors work in areas where licensing requirements are lax enough to allow for unqualified or under-qualified people to present themselves as professional home inspectors. 

If you live in the Virginia/DC area and are looking to schedule a home inspection for radon or any other matter, be sure to contact Alban Inspections today!