By definition, seepage is the slow escape of a liquid or gas through a porous material. Concrete can be very porous which means your basement could be allowing for water seepage, moisture seepage, and radon seepage.
Signs of Seepage
Water seepage is easy to detect. Typically, you will see water coming in through your basement walls or floors, or you will see signs water has been there (wet spots on the concrete). Radon seepage however is very common but not so easy to detect. In order to determine whether you have a radon problem in your home, you need to purchase a radon test kit.
The best way to prevent seepage – of water and radon – is to seal your basement floors and walls with a deep-penetrating sodium silicate based sealer, like the one offered by Foundation Armor. The Foundation Armor concrete sealer will strengthen the concrete and help prevent the intrusion of water, insects, and radon.
If you have a crack in your basement floor or wall, you need to repair the crack using a hydrophobic polyurethane injection grout. Once the crack is sealed, you then need to seal your basement with a concrete sealer. In many cases, repairing cracks and sealing your basement will stop water and significantly reduce radon. In more serious cases, you may need to hire a foundation company or radon mitigation specialist.