Please know that I am not a radon expert, though I know a heck of a lot more about it than I did a couple of months ago. This is simply an update on our radon issues.
What we’ve been told is that if the radon reading is 4 or above, a remediation system needs to be installed. We were also told that it was close to impossible to get the numbers inside the house below 2. In our area, apparently the radon numbers outside are about 2. I found this info on the internet:
The average outdoor radon level is approximately 0.4 pCi/L. Indoor areas are typically 1.3 pCi/L in the United States. If home levels are at or exceed 4.0 pCi/L, homeowners should take steps to mitigate radon in their home.https://www.soils.org/about-soils/contaminants/radon/#:~:text=The%20average%20outdoor%20radon%20level,mitigate%20radon%20in%20their%20home.
I think it was January 2 that the radon man came out and installed our system. We will always keep a radon meter in our home. In fact, we have three now – one in the basement family room, one in the basement bedroom and one in the main bedroom upstairs.
Our house has a French drain that goes around the two sides for sure . . maybe around the front, but I don’t think it goes around the back. I could be wrong but I do know it’s on the two sides. We knew where one pipe came out – on the north side of the house – but we never could find the south side pipe. Before the radon man came, Vince had done a lot of research on on using the French drain for the system but he had talked to probably five “experts” in Missouri and all of them acted like he was crazy wanting to use the French drain, yet everything he read seemed to suggest those who used French drains had excellent results. Vince set up an amateur system and used a small, very inexpensive greenhouse fan and PVC pipe to make a stack and immediately the levels in the house went down from 5+ to below 1.0. Vince was impressed but he radon man wasn’t so impressed.
We thought we had gravel under the foundation but all the radon man hit was sand, which didn’t give him much hope of a successful mitigation. He installed his system and Vince turned off his little fan and our levels went up. The radon levels went up and when they got to level 2, Vince hooked his system back up and they almost immediately dropped back down to below 1.
The system Vince hooked up is about the fartherest point from electricity and he was using a heavy duty extension cord but Jeremy came over and helped Vince find the pipes for the French drain on the south side of the house Vince dug that area up, capped the end of the line and installed his little greenhouse fan and this is the current reading in the basement family room. It’s much closer to electrical outlets will the vent pipe will be much less in the way using the south drain.
.10 is an unbelievably low number, especially since our mid-afternoon temp is 32 degrees. Probably most of the houses here, even those that have not needed a radon mitigation system, have higher numbers than that. I’m so thankful that Vince insisted on doing more and I’m thankful Jeremy put that French drain in and was able to help find the pipe.
The Short Term Average number alternates with the 7 Day Average and the 7 day average right now is .58. So long as the numbers all stay below 2, I’ll be happy but I have a feeling they’re going to stay below 1.