Originally Posted By: Mark Anderson
This post was automatically imported from our archived forum.
moisture intrusion onto bsmt floor is due to problem w/bsmt wall imo. and the problem(s) will either be
a) vertical,step, horizontal crack(s) on the outside of that wall which allows moisture/water into the cells of block and onto the floor on the inside along the cold joint
b) parging on the outside of wall that was done when built is becoming loose/deteriorating & allowing moisture/water into the cells of the block `n onto the floor along the cold joint
c) a direct opening(s) outside 'above' ground level-above the top of bsmt wall incl`g open mortar joints in brick,loose-cracked-porous bricks, replacement/caulking needs around bsmt windows, where any service-line enters the home and on certain wind blown longer rains these kinds of 'above grade' openings can allow moisture/water to enter and go into the cells of the block & onto the floor along the cold joint
d) a combination of any of the above
just because a crack is not visible on the inside doesn not mean there isn`t a crack on the outside of wall, this happens all the time w/block walls.
The Real reasons basements leak