What conditions occur to make your basement wet?

  As the ground becomes saturated, the water table begins to rise, putting pressure against the basement floor. Water seeks cracks which have been caused by the expansion and contraction of the cement.
  Exterior footing-drains clog, forcing water to seek the path of the least resistance which is under the footing. Water seeks cracks in the floor, entering the basement at the cove.
  The footing is poured separately from the wall. The wall is the constructed on the footing. Since it is impossible to get a perfect seal between the footing and the wall, water is able to enter the basement at this junction.
  Due to the expansion and contraction of the cement blocks the parging which has no elasticity, cracks with changes in temperature. This allows water to enter through these cracks and into the mortar joints, filling the bottom course of blocks. This penetration of water into the blocks also causes the blocks to lose their insulation value.
  Because the parging has no elasticity and because the blocks are made of a porous aggregate, the blocks draw moisture to the inside of the basement, permitting the walls to sweat and bleed.