What Happens When Radon is Mitigated From My House?

The following is just a simple outline of what Patterson Comfort & Safety will do to help reduce radon
in a home in the Dubuque area or Southwest Wisconsin.  
Typically there are 3 ways for us to reduce the radon in your home, but it really depends on your layout.  Every home and situation is different.

The most common radon installation system used is
Sub-Slab Depressurization.   This method pulls the radon gas and other soil gas from the soil below a concrete slab. A four-inch hole is cored through the concrete slab to reach the soil below it.  We will dig out about 10 gallons of dirt, clay, gravel, whatever is below the slab to create a radon gas collection chamber to create greater a surface area to suck out the radon gas. Radon suction pipes are installed in the collection chamber and continue to the radon vent fan. 

Don’t worry, we will clean up all the mess and all you will see is a white PVC tube coming out from the slab.  The only time we do not dig out a hole is when there is an active sump-pit and we have decided to install our system there.
Sump-Pit
The second most common radon installation system is by way of an active sump-pit. This option pulls the radon gas and other soil gas by creating a vacuum within the existing drain tile network of a sump or drainage system. This method allows the radon mitigation system to more easily communicate with the soil surrounding the drain-tile system.  If the current sump-pump is older than 5 years-old, we recommend replacing it.  We would also seal the cover with a see-through dome lid in most cases.

The third, but least common is Sub-membrane Depressurization.  This is usually followed when there is a crawlspace or exposed dirt present.  The radon gas and other soil gas is pulled from below a vapor barrier.  In homes and buildings with exposed dirt or gravel crawlspaces, an air-tight vapor barrier is installed and the radon suction pipes create a vacuum under this membrane.

No matter which of the above methods we use, the PVC tube will eventually go through one of the exterior walls in most cases.   When a radon mitigation system is installed on the exterior of a home, the pressurized components of the radon system are located outside while the interior components are under suction. The radon fan is usually installed at knee level opposite of the rim joist. From the fan, the radon vent stack runs exposed and can go through the soffit or around the eave depending on what selection is made.

After everything is running we make sure we are getting good suction from the fan we have selected.  We can gauge this by monitoring our
U-tube.  If it looks like a “J” then it is working good, if it looks more like a “U” something is wrong.

Once everything is working we will follow up with you in about a week and will re-test the house to see if the system is working properly.  When we complete the test, this completes our process.

Heating & Cooling Services | Dubuque, Maquoketa, IA & Surrounding Area
Home comfort means keeping the temperature just right.
Radon Gas: The silent killer
According to the Surgeon General, radon is the second leading cause of lung cancer behind cigarettes.
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