09-07-2013, 08:07 AM
they did & do... older concrete foundations often had hot tar, now more likely poly. However a puka in the vapor barrier makes it a vapor suggestion (heck, even the best barrier will not work as well around the normal foundation holes for plumbing & such....)
Also the heavy clays in many older glacial/alluvial soils do have a habit of working over concrete foundations...and will often expand to non-covered edges, & even crack foundation walls...
Also the heavy clays in many older glacial/alluvial soils do have a habit of working over concrete foundations...and will often expand to non-covered edges, & even crack foundation walls...