Radon Mitigation Question (Tu Tuff Liner)
I am working on a design of a small (12′ x 16′ — 192 sq ft) workshop with a crawlspace that will most likely need some kind of radon mitigation plan. I definitely understand the details and “strategy” of initially putting in the perforated pipe and riser, then capping it so that a “passive” system is in place. If the picocurie readings are high, then one is in a good situation to finish the system or make it an “active” system with an inline fan. My question is this. Why couldn’t one simply use a Tu Tuff liner under the inner slab AND extend it out underneath the footing so that one could block it all together? I am most likely going to use a heavier vapor liner because my space is so small and I would like to avoid having a 3″ pipe run up through the space.
I have seen a few footing details that show a vapor barrier under the footing but those are mostly mono-slab pours. I was wondering if a crawlspace might allow for such an assembly.
Any thoughts on this are appreciated.
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