Quote:
Originally Posted by Porsche-O-Phile
My experience with the sealer (Radon Seal) is that it's a waste of time. Ventilation and/or a fan-based active under slab setup almost always work. Sent a pm with more info. and will post more later... I've done a lot of research into this in the last few months.
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In fact, many of the articles state that the reason Radon is such a problem today is from the newest houses being tight.