If you are suspicious of radon in your area you can have a company to come to your home and test for it or you can purchase a do-it-yourself tester. It is important these tests meet EPA requirements. Along with sealing cracks in the foundation and walls, ventilation is key to passing a radon test. There are multiple methods to ventilate which a radon inspector can assist you with.
Open windows. This will increase airflow through the house and assist in the ventilating process.
Install vents in the basement or crawl space. The company working with you will decide the best option. For example, the options could vary depend on whether you have a dirt or cement floor basement.
Increase air movement. Turn on stand alone or ceiling fans to help move air throughout the house. Circulation is very important.
Vent air outside from the floor. Sump holes (holes in your sump pump) or floor drains can be created to create another exit, or vent, for the radon.
Retest your home. Recheck your house with the do-it-yourself tester you purchased or have the company come back periodically. Make sure the ventilation system that has been set up shows a decrease in radon.