Radon Doctor
Radon Mitigation and Testing
"We Save Lives Daily"
  Serving Frederick, Southern Carroll and Eastern Washington Counties in Maryland;
Jefferson and Berkley Counties in West Virginia

Mitigation Services

Passive Systems and New Construction Homes

In most cases passive radon systems are installed during the construction stage of newly built homes. All new homes should have a passive radon system. A passive radon system includes a pipe fitted into the slab prior to the slab being poured. This is done so the passive piping will have good access to the radon air under the slab. The pipes required for a radon system can be built into the home's interior walls with good access in the attic for a radon fan to be mounted on the pipe and then the pipe will be vented through the roof or through the side wall. An electrical outlet should be installed near the radon pipe in the attic.

  Sub-Slab Depressurization Systems:

A 4" hole is drilled into the concrete slab. A suction pit (cavity) is created into the gravel and soil below. Piping is then installed into the hole and a mitigation fan is mounted on the pipe (in the attic or on the exterior) to draw radon from beneath the slab and exhausted safely to the home's exterior.


Piping with perforations is laid on the dirt or gravel inside crawlspace, and a 6 mil plastic sheathing is placed over the entire crawlspace area. A radon fan on the piping draws the radon out from under the sheathing (vapor barrier), and is vented safely to the exterior of the home.

  Garage and Attic Installations:

In some cases it is possible to run the radon piping from the basement up through closets in the house or out into the garage and then into the attic above.

Exterior Installations:

With slab on grade homes or walk out basements it may be possible to install a radon system entirely on the outside. This is a useful method when your basement is finished and you may not want piping inside your finished basement area.

Other Considerations:

Sump pumps, floor cracks, perimeter cracks, any open holes in the concrete slab, and Interior French Drain Systems all must be sealed. Furnace drip line should be fitted with a condensate p-trap. A vacuum u-tube gauge to measure system performance and to show that the radon fan is operating will be installed on the pipe.