Assisting contractors and homeowners in solving radon mitigation and building air leakage measurement and control problems since 1980. Call toll free (888) 349-7236 for help.

Radon mitigation and basement waterproofing made easy! RadonSeal penetrating concrete sealer stops water seepage, radon, and dampness PERMANENTLY.

IAQ Engineers, Radon Consultants, Radon Testing and Radon Mitigation Specialists... Radon risk analysis and liability control.

WELCOME to the RTCA web site! RTCA, Radon Testing Corporation of America, has been providing radon testing services since 1986. We have been rated the #1 Radon Laboratory by Ralph Nader's Consumer Advocacy Group, Public Citizen and have received high ratings from Consumer Reports. RTCA is the choice of thousands of radon professionals and homeowners nationwide! This site has been designed for ...