The type of mitigation system used depends on whether your home features a basement or a crawlspace. In a basement, a hole is bored through the concrete slab and a PVC pipe system with a fan is installed to vent the gas from under the slab away from the home. In a crawlspace, the same type of pipe and vent system is installed into the ground soil, but the entire crawlspace will need to be encapsulated with plastic sheeting. Also, if your home has an existing sump pump installed, it can be used in conjunction with a pipe system to mitigate radon from your home.
For both systems, the pipe system has to vent out from the highest point of the home. The pipe system can be installed along the exterior of the home like a gutter system, or the pipe can be routed through the interior of the home and out through the roof – the determining factor here being the amount the homeowner is willing to spend.