Radon Gas is a naturally occurring radioactive gas that was first discovered in 1900, but the health risks of exposure to the gas were only discovered in 1984.
MacLennan can design and install Radon gas and ground gas systems to deal with Methane, C02. The systems can be part of a combined waterproofing system or a standalone system. Some contractors will claim that it is mandatory to install a gas proof system ( at additional cost ) this is not the case. MacLennan or your engineer can advise if gas remediation is necessary.