hi ehrich,
did you ever think about using RadonSeal.com or SaniTred products to seal the basment?
we are looking to fix our problem and may try these.
kim
we're looking for some help in d-i-y radon abatement/mediation. wanted to know if anyone out there has done this. we have a newer house/poured concrete basement in good shape, with a 4.2 radon level. we are thinking about RadonSeal.com's products or SaniTred.com's. Any thoughts or experiences...