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  #11  
Old 07-23-2009, 08:37 AM
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I suspect that houses which can be left more open to the elements are less likely to have Radon issues. Here, housing construction is so poor that very few houses are even close to airtight. Of course, that can be dealt with in San Diego...not so much in places like Iowa...
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Old 07-23-2009, 08:39 AM
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Quote:
Originally Posted by jerhanner View Post
We've got it set up so the current owners need to fix the problem and then retest before we keep moving forward. I guess they're going to seal the rec room/basement and put in some kind of venting.
NCC, love the map. I wonder why the radon is concentrated where it is?
Uranium present in the earth's crust.
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Old 07-23-2009, 09:13 AM
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Won't the SEALS object?

No, we're locking some SEALS up in my basement for my, er, enjoyment.

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Old 07-23-2009, 01:25 PM
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Radon is a decay product of uranium, which is relatively common in the Earth's crust, but generally concentrated in ore-bearing rocks scattered around the world. Every square mile of surface soil, to a depth of 6 inches (2.6 km2 to a depth of 15 cm), contains approximately 1 gram of radium, which releases radon in small amounts to the atmosphere. On a global scale, it is estimated that 2,400 million curies of radon are released from soil annually.

I was pretty sure that Radon occurs where Uranium is present in the crust.

I did some research. You'll want to look into a deep penetrating contrete sealer that seals the pores in the concrete. This will waterproof the concrete, but more importantly it will create a vapor barrier that the radon gas cannot penetrate.
Dust, or smoke in the atmosphere will give the radon something to bond to and is more likely to permit inhalation of the gasses into you lungs, so you'll want to adequately ventilate, and if you smoke you'll want to refrain until the radon issue is resolved.
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