Hi, I’m about to undergo a garage conversion. Including a slab on grade retrofit, where PVC drain pipe will be added beneath the slab.
The plan is to saw and then jack hammer the path where the drains are to be added. There is a taped and sealed Stego radon barrier as well as 2-4″ of XPS beneath the slab.
My question is if any one has done anything like this. And has techniques that might be used for repairing the Radon barrier and foam when reassembling and patching the concrete. Or alternate strategies to have a functional radon barrier when all is said and done.
I should also note there is an existing passive radon ventilation system already in place. And no historical issue with high levels in the space.
Additionally if anyone wants to weigh in on the debate regarding untreated wood being laid direct on a slab. With a 15 Mil vapor barrier and 2-4″ of foam in place. It would be appreciated.
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