Folks, we ran into an issue in the basement car park for a Hi Rise residential building. This is the B1 level, first basement level under the ground (there is a lower B2 level as well). The ceiling of that basement has multiple areas of past water leaks that seems to have dried out at the time of our inspection. The building maintenance team says that the water keep dripping from one area then stop after a week or so and drips from another and hence the multiple areas we observed.
At this time, during our inspection, the leak is active near and around an exhaust duct penetration into the ceiling. This penetration is very close to the exterior wall.
I have attached few photos and IR images for you to view.
Apparently the building owner association has been wondering around with the issue for almost 6 months and they have hired multiple companies and no one seems to know the root cause and therefore the remedy?
Would appreciate ANY thoughts to what that could be given the below facts:
- The walls and the ceiling are reinforced concrete foundation walls and slab
- The Podium floor on top of this floor is another parking level but COMPLETLY dry
- There is a Pool in 1st Floor (On top of Podium), so it is two floors above the leak area
- The building maintenance guys think that this problem started when they filled the pool as it was empty for a period of time. Nothing documented but they think the problem started just about at the same time!
- Behind the foundation wall that is almost adjacent to the duct roof penetration (leaking area) is an abandoned land that seems to have a very high ground water that can bee seen with lots of water puddles appearing at the surface.
- The wet area on the wall is very limited to like 3 meter wide. Rest of the foundation wall that is further away from the duct penetration (leaky area) is completely dry
- The leak is not slight dripping. It is rather a lower pressure “shower like” dripping!
ANY THOUGHTS OR EVEN TINGS TO EXCLUDE FROM OUR ROOT CAUSE ANALYSIS?