Radon can enter your home any place where the house touches the soil and there is an opening.
Possible entry points into your home include:
- cracks in foundation walls and floor slabs
- construction joints
- gaps around service pipes
- support posts
- window casements
- floor drains
- sumps or cavities inside walls
- dirt floors
- the amount of uranium in the ground
- the number of entry points into your home
- how well your home is ventilated
It is estimated that a non-smoker exposed to high levels of radon over a lifetime has a one in 20 chance of developing lung cancer. That estimate increases to one in three for a smoker exposed to high levels of radon over a lifetime.