When there is sufficient water build up beside or below the footing, water can find it's way over the footing and onto the basement floor through construction joints.
An increase in water accumulation at the footing may sometimes force water under the footing and through existing gaps into the basement floor.
Blocked weeping tiles, persistent rain or other factors can cause excess moisture to seep into the porous foundation walls and penetrate the interior, Window wells may also be a contributing factor.
Water will always take the easiest path to a low point. If you have wall cracks or deteriorated mortar joints, these provide ready access for water infiltration at times when it has not properly drained on the exterior, Efflorescence is one sign of this problem.
As hydrostatic, water, pressure mounts on the exterior of the structure; water will be forced into the home through any available cracks no mater how small. Evidence can be found on the floor or walls.
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