Radon Prevention...Did you?
We are planning on radon prevention by placing 10mil plastic on top of the rock base below the basement concrete slab. It will be sealed to the walls with a caulk/tar sealant and sealed to itself overlapping by 12" where needed. We are placing a 4" PVC pipe into the rock below, with a "T", and venting directly straight up and out through the roof. With the ability to come back in later and install a exhaust fan if it needs more help pulling radon out.
Our concrete guy said he doesn't see it very often. Some have comented that the plastic alone will keep it out and we don't need the vent. The more I read the more confused I get. Any insight would be greatly appreciated. I'm not backing down from this one just due to the potential health implications.
It is not part of the code in our area.