My question is what is the next step to reduce the radon in my home? Here is what has been done so far. Please bare with me Bought a house built in 1988 in Virginia and had the house tested for radon before purchasing. It passed but there are times shown on the hour by hour test that the levels can reach as high a 8 pCi/L. But the average is below 4 pCi/L. I plugged in one of these Safety Siren Pro Series 3 HS71512 Radon Gas Detector and the lowest levels i have seen is 13 pCi/L. The house has 2 radon fans in the unfinished basement. Both appear to be working with a negative of close to 1pa. All of the gaps in the concrete to the block wall is caulked. I just finished spraying the entire slab with a product called radon seal that claims in will reduce the radon levels that leech through the slab. Well according the the Safety Siren there was not a change. So now i am wondering what the next step is to continue to reduce the radon levels. Would like to be under 2 pCi/L. Thanks for your help Josh
