Professional Radon Reduction & Measurement Services

Mitigation Methods

There are two general methods for reducing radon in your home: One technique prevents radon from entering your home. The other reduces radon after it has entered. The EPA generally recommends techniques which prevent entry.

Soil Suction techniques prevent radon from entering your home by drawing the radon from below the house and venting it through a pipe, or pipes, to the air above the house where it is quickly diluted. These techniques are used in the vast majority of radon mitigations today.

Testing is often involved in choosing the best system. We check for cracks and other radon entry points which require sealing during mitigation. Soil communication tests are used to determine how easily air can be suctioned away from under the house. A Pressure Field Extension Test determines the precise amount of airflow available, helps in selecting fan and pipe sizes, and is a good predictor of system performance.

House Foundation Types


The type of house will affect the kind of radon reduction system that will work best. Most homes fall into three categories: Basement, Slab on Grade or Crawl Space. (Many homes have a combination of these types, especially homes with additions.) The EPA recommends the following techniques as the most effective methods for reducing radon gas.



Sub Slab Depressurization - Inside Routing

Sub Slab Depressurization - Exterior Routing

Drain Tile Depressurization - Internal

Drain Tile Depressurization - Drain to Daylight

Subslab Depressurization:

This is the most common and usually the most reliable radon reduction system in homes with basement or slab foundations. One or more pipes are inserted into the floor slab. Often, only a single pipe is required. A centrifugal radon vent fan connected to the pipes(s) draws the radon gas from the house and releases it into the outdoor air while simultaneously creating a negative pressure (vacuum) beneath the slab.

Drain Tile & Sump Hole Depressurization:

Similar to Subslab Depressurization in all other respects, these techniques involve tapping into a drain tile system to provide a "pressure field" for drawing out radon gas, and are equally effective.

Sub-membrane Depressurization:

Radon reduction in earthen crawl spaces involves covering the floor with high-density plastic sheeting. The sheeting is tightly secured and sealed to the crawl space walls, and a suction fan placed under the sheeting directs radon gases out of the house.