How do you install a radon barrier in a crawlspace with an uneven floor?

Reinhart Bigl
Updated: Nov. 29, 2021

Most of our basement is on a concrete slab...except for one part of it, which is an enclosed room that has a huge rock in the middle of this creates very irregular surface and thus is what we think a very unique challenge.  As such, we are not sure what the best method would be for mitigation.   We were told by one radon mitigation professional who came to our home, that our first step would to be to install a vapor barrier over the entire surface, ensuing that it is air tight...and that we could do this ourselves.  As we have never done this before, is there any way your group can you help us to decide best practices?  We are of course willing to provide pictures and if necessary, receive a visit from a mitigation professional who has experience in these unique cases.  Thanks.

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