About the Radon Mitigation Process

There are several methods we can use to lower radon levels in your home. Some techniques prevent radon from entering your home while others reduce radon levels after it has entered. EPA generally recommends methods that prevent the entry of radon. Soil suction, for example, prevents radon from entering your home by drawing the radon from below the home and venting it through a pipe, or pipes, to the air above the home where it is quickly diluted. (Radon Mitigation Process - Consumer’s Guide to Radon Reduction; EPA.gov/radon)

Sub Slab Depressurization (SSD) or Active Soil Depressurization

Radon Mitigation Process - The most common approach is a “Sub Slab Depressurization” or Active Soil Depressurization (ASD) system, which uses a fan and PVC pipe to draw soil gasses from below the basement floor and then release it above the roof. The radon fan creates a vacuum under the basement floor drawing soil gasses out before the get into the house.
radon mitigation vermont

Sub Membrane Depressurization (SMD)

When a stable slab is not present we encapsulate the soils with a robust vapor barrier. A 6 mil cross-scrimmed poly is secured to all exterior walls creating a sealed environment that we then deploy our conventional fan/pipe system. (Radon Mitigation Process)

sub membrane radon


When option #1 & #2 are not viable utilizing a Heat Recovery Ventilator (HRV) can address the problem. HRV’s remove radon ladened air and introduce fresh outdoor air. “The solution is dilution”. On a cold winter day the heated indoor air is run through the unit transferring the heat energy into a radiator core. At the same time the cold outdoor air runs through the radiator and is warned. The result is fresh cooler air being introduced into the home. HRV’s are not a “first-Tier” solution because they are expensive and have both heating and cooling impacts on the indoor air environment. Warmer-Summer & Cooler-Winter. (Radon Mitigation Process)


  1. Cracks in solid floors
  2. Construction joints
  3. Cracks in walls
  4. Gaps in suspended floors
  5. Gaps around service pipes
  6. Cavities inside walls
  7. The water supply
radon mitigation

Don't Delay on Radon!

It is important to get tested right away to determine if your family is being exposed to radon poisoning.
300 Seminary Avenue Unit 955 
Manchester, VT 05254
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