Radon Mitigation

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Reducing dangerous radon levels

This page gives you the basic facts about radon mitigation systems. Use the links below to quickly go to the section that interests you most.

Inspection Connection, Inc., employs licensed and highly experienced radon mitigation contractors in every state. We can arrange the design and installation of an appropriate radon mitigation system for your home. As for all our services, we are always available to answer any of your questions and provide expert advice. Just give us a call or send us an e-mail.


 

When to install a radon mitigation system

EPA (Environmental Protection Agency) recommends that you take action to reduce your home's indoor radon levels if your radon test result is 4 pCi/L or higher.

The choice of the right radon mitigation system depends on how your home was built and other factors. The cost of such a system often ranges about the same as the cost of other common home repairs, like painting or having a new hot-water heater installed.

The design and installation of a radon mitigation system should always be done by a professional mitigator. A properly installed and maintained radon mitigation system keeps the radon levels below 4.0 pCi/L for many years. Typically, mitigators warrant for one-to-three years that their system will perform as designed.

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Types of systems available

A variety of methods can be used to reduce high radon levels in homes. The system that's best for you depends on your house type. Houses are generally categorized according to their foundation design: basement, slab-on-grade (concrete poured at ground level), or crawl space (a shallow unfinished space under the first floor). Some houses use a combination of these and require installation of more than one type of radon mitigation system.

Here are two examples of the commonly used radon mitigation systems:

 

  • Sub-slab ventilation (depressurization) - This is the most commonly installed system, used in houses which have a basement or slab-on-grade. It draws the radon gas from beneath the basement floor and sends it outside. Here is how it works: a radon mitigator inserts a vertical plastic pipe through a hole in the basement floor and sets it so that the pipe runs up either through the walls and ceilings above the rooftop, or outside of the home reaching above the roof line. To complete the system, he attaches a suction fan to the pipe.

 

  • Fresh air ventilation system - This system is used for houses with crawl spaces, generally in warm climates where there is no winter. Here is how it works: a mitigator constructs a fan and duct system to force air into the house from the exterior. The increased air pressure in the foundation structure decreases radon infiltration.

 

Taking into account special features of your house, a radon mitigation contractor may use these or other methods to create a custom designed system that works best for you.

Note: To make sure that your system works properly, you should test the radon levels in your house after it has been installed. Also, if in the future you start occupying a lower level of the house (e.g., a rec room in the basement) you should retest your home again on that level. In general, EPA recommends that each house be tested once a year to make sure radon levels remain low.

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Inspection Connection, Inc. - Radon mitigation - last modified 12/19/2004