and installing INT drainage systems do NOT stop the gas that enters through ext cracks, mortar joints, gas pipes etc and some of these INT systems allow MORE radon gas into the stupid basements.
–cracks in concrete slabs (don’t forget the THINNER perimeter concrete they put back in & lol if often cracks)
–spaces behind brick veneer…
–pores and cracks in concrete blocks
–FLOOR–WALLS JOINTS, duhhh!
–exposed soil, as in sump or crawl space
–weeping (drain) tile, if drained to open sump
–mortar joints
–loose fitting pipe penetrations (like the EXT gas line gaps etc in videos)
–open tops of block walls
–well water
–don’t forget deteriorated rod holes etc
https://www.youtube.com/watch?v=ipt5WgHqvJQ don’t think soil gases, water etc can enter these huh? lololll yeah okay