[Greenbuilding] radon question

[Douglas E Lamb]

Mr. Olsen,

I found this attachment on the EPA site.
Most code books I looked into regarding radon only dealt with new
construction.
Then I looked up the EPA regulation for existing condition and found this
site;
http://www.epa.gov/radon/pubs/consguid.html#reductiontech
Hope it helps.
Mr R T will probably produce better sketches that represent similar methods
resolving your radon issue.

Regards,
Doug Lamb
douglaslamb at columbus.rr.com
 

-----Original Message-----
From: greenbuilding-bounces at lists.bioenergylists.org
[mailto:greenbuilding-bounces at lists.bioenergylists.org] On Behalf Of Clarke
Olsen
Sent: Monday, April 02, 2012 5:23 PM
To: Green Building
Subject: [Greenbuilding] radon question


A ground floor room tests positive for Radon - not high, but more then
nothing.
The floor is 4+" of concrete on 2" ext. styrofoam, on 6 - 8" of gravel.
Big (1/2") joint between foundation and slab is the likely source.
Should I: 
                 a) seal-up the joint with non-shrinking mortar?
                 b) seal it with expanding foam? With caulk?
                 c) arrange some form of fat baseboard vent?

Clarke Olsen
373 route 203
Spencertown, NY 12165
USA
518-392-4640
colsen at fairpoint.net





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