Radon Blog

November 07, 2018

How to mitigate Radon in Arizona

The main method to mitigate Radon is to install a vent pipe system and a fan, to remove radon from the house and vents it to the outside.

It is generally recommended to use methods which prevent the entry of radon. Soil suction is one of them. It prevents radon from entering your home in Arizona 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 diluted.

Sealing the home alone doesn’t reduce radon because radon can enter anyway.

It is also important to build a new house following the guidelines to reduce radon.

If you're building a home, you can save yourself loads of worry—and money later on down the road—by installing a passive radon control. Here's how:

  • Install a layer of gas-permeable aggregate, such as four inches of gravel, beneath the slab or flooring system of your home if you don't have a crawlspace.
  • Cover this layer or your crawlspace floor with plastic sheeting to stop radon gas from moving past that level and into your home.
  • Seal and caulk all cracks in your foundation and walls. Not only will this help prevent entry of radon, but it'll add to the energy efficiency of your home.
  • Run a three to four inch gas-tight pipe from the first layer or crawlspace to the roof. This will safely vent gases from the soil to the outside.

Wire in an extra circuit to the attic so that a vent fan can be installed to turn the pipe into a vacuum-cleaner, or an active radon control system, which routes the gas out of your home


Arizona and Radon Gas

Radon presence in Arizona is similar to the national average.

A state indoor radon sampling survey conducted in 1987-89 by the Arizona Radiation Regulatory Agency suggest that about 1 out of 15 Arizona homes may contain radon concentrations in excess of the EPA recommended action level of 4.0 picocuries per liter of air (4.0pCi/L).  

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