How to Install a Radon Mitigation System

pvc chimney vent on a shingled roof
  • 2-5 hours
  • Intermediate
  • 50-200
What You'll Need
Radon mitigation system
Foam rubber backer rod
PVC pipe
PVC vent pipe
Rotary hammer
Demolition hammer
Soil-auger bit
Cement bit
Hydraulic cement
Smoke pencil

A radon mitigation system can be a valuable addition to to the safety of any structure. Radon is odorless, tasteless, and invisible, which makes it an insidious danger. Prolonged exposure to radon can cause cancer, and in fact among non-smokers, it's the leading cause of lung cancer. Radon is a radioactive gas created by the decay of uranium, an element that can be found in rocks, water and soil all over the world in varying levels.

The human body can tolerate certain amounts of exposure—normal air carries around 0.4 pCi/L of radon. Radon gas inside a building can increase over time to dangerous levels, especially if there are smokers present. A radon mitigation system is used to reduce the amount of radon in the air. This is a job best left to a licensed radon mitigation system contractor, but the article below will explain how the installation is done.

Step 1 – PVC Vent Pipe Access

A vent pipe can be used by the radon mitigation system to transport the gas from the basement to outside of the home of building. A pencil will be used to mark the area in the basement floor where the PVC vent pipe will be installed. In most circumstances, this will be near other equipment in the home like the hot water heater.

After the location is marked, use a rotary hammer to create several holes to outline the marked area. The demolition hammer is then used to break away the concrete floor. Once the concrete is removed, the dirt will have to be removed with the soil-auger bit attached to the drill. The goal is to create a 20-inch diameter hole.

Step 2 – Install the PVC Vent Pipe

Now that the hole has been made the vent pipe can then be installed. The vent is placed in the hole and secured with soil. The PVC pipe is then run through the walls of the structure and into the attic.

Step 3 – Sealing the Hole

A foam rubber backer rod is placed around the base of the PVC vent pipe with it is residing just below the concrete floor’s surface. The area around the pipe can then be sealed with hydraulic cement.

Step 4 – Venting Radon

The PVC pipe is attached to a venting fan in the attic using metal brackets. The pipe is then continued from the vent to the roof and is attached to a roof cap.

Step 5 – Radon Mitigation System Installation

With the venting system in place the radon mitigation system is then installed in the basement to cap the PVC vent. The monitor system is then installed. A small hole is then drilled in the floor of the basement and the draw of the fan from the radon mitigation system is checked with a smoke pencil.