A radon mitigation system is an important addition to your home because prolonged exposure to radon can cause cancer. It is also and is the second leading cause of lung cancer. Radon is a radioactive gas that is created when uranium decays. Uranium can be found all over the world in varying levels.
While the human body can tolerate certain amounts of exposure to radon, levels that are more than four pCi/L are considered dangerous. Radon abatement is used to reduce the amount of radon found in the air. Installation of such a system is a job that is best left to a licensed contractor.
The first thing the installer will do is to create PVC pipe access. A vent pipe is used to transport radon from the basement to the outside of your house. He or she will use a pencil to mark the area on the basement floor where the pipe should be installed. It will most likely be near other equipment in the home, like the hot water heater.
After he or she marks the location, he or she will use a rotary hammer in order to create several holes in order to outline the marked area. He or she will then use a demolition hammer to break away the concrete floor. Then, once the concrete is removed, a soil auger bit will need to be attached to the drill so that the dirt can be removed and a 20-inch diameter hole is created. Once the hole has been completed, the vent pipe will be installed. It should be a tight fit. Next, the PVC pipe is then run through the walls of your house and into the attic.
After all of the pipe is run, the contractor will install a foam rubber backer rod around the base of the vent pipe. It should be placed just below the concrete surface of the floor. Once that is complete, the area around the pipe is sealed with hydraulic cement.
The next step is to attach the pipe to a venting fan in the attic using metal brackets. Then, the pipe is placed so that it can go from the vent to the roof. Finally, a roof cap is attached.
Once the venting system is in place the radon remediation system is then set up in the basement and capped to the vent. Next, the monitor system is installed through a small hole that is drilled in the floor of the basement. Finally, the draw of the fan from the radon mitigation system is checked with a smoke pencil.
When all of the steps have been completed and the system has been installed, your contractor should then test it. In order to do this, he or she will drill a small hole in your foundation, turn on the fan, and use a smoking piece of burning paper in order to see if air is being sucked into that hole. After testing is complete, a manometer will be placed on the basement piping, so that you are able to tell whether or not the system is creating the pressure differential needed to suck air up from the ground.