Has anyone successfully put a radon barrier in an old stone house?
From researching this, and reading previous posts, I gather that the radon barrier should extend beyond the external walls. Makes sense, thereby the gas will hit the barrier and have no where to go except outside I presume? Easy in a new build.
But how do you slip a barrier under 2 ft thick stone walls?
The inside of the external walls will be drylined with a gap between the stud and the stone wall. Would bringing the barrier up behind the stud suffice. I'm guessing not, since the space betwen the stud and the wall will be airtight (in theory)....so I'd just get a build up of gas in there.
Would a sump do?..
Would I put in a sump, put down the radon barrier instead of the DPC...extend it behind the stud...or what?