Thank you. I bought four new houses since I got married. The last one was a few years ago. I don't know what they do. They pour a concrete frame. They put bricks up. What do they do to make the house safer from radon, to reduce the radon in the house? Physically, what do they do, or is it just a matter of ventilation?
On June 18th, 2015. See this statement in context.