Is Vandex a radon barrier as well as a tanking material suitable for application in a basement?

No. This is because Vandex ( vapour-permeable and therefore will not act as a barrier to radon gas. A separate radon barrier will have to be specified as part of the design detail. This could take the form of Oldroyd Xv membrane (, double-sealed at all joins in order to comply with regulations. It is best to consult our technical department re: the specific detailing of this.

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