Case 1

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Cause of Defects

  • Lack of provision or failure of waterproofing membrane around the pipe may lead the water leakage through structural floor.
  • Aging of waterproofing membrane could lead to failure of water-tightness of the discontinuity at the penetration. Generally, durability of waterproofing membrane is 10 – 15 years.
porous_infill
Figure 1: Water seepage through porous infill
  • Porous infill of the cold joint at the penetration attributed to hacking of concrete slab and/or leaving large openings during casting could be another factor (Figure 1).