Water pipes or drainage in new concrete slab??

[Compact-living]

I assembled a loft bed for a customer where a little water came out where I installed my expansion bolt.

Water dripped/ran out for a day.

The inspection company claimed that it was the drainage from the upper floor.

Is it common to place drainage in these concrete slab spaces?

So this became an insurance case.

I install with short bolts 4-5-6 cm depending on how it feels when drilling.

This is a completely new house from 2021.

What do you see in the picture? Some black gunk, for what?

 

[Installation]

I installed a loft bed for a client where some water came out where I installed my expansion bolt.

It dripped/ran out water for a day.

Which they (the inspection company) said was the drainage from the upper floor.

Do they usually put the drainage in these concrete slab hole spaces??

So this became an insurance case.

I install with short bolts 4-5-6 cm depending on how it feels when drilling.

This is a completely new house from 2021.

What is that seen in the picture? Some black goo for what?

Hollow-core slabs are not super common in residential buildings. The drainage can run short distances in the holes.
There is usually water left in hollow-core slabs, and if not drained during construction, it can remain.
It is unlikely to be a drain. Where is the wet area and pipes located in relation to where you drilled?

 

[Compact-living Robban]

Hollow core slabs are not super common in residential buildings. The drainage can go short distances in the holes.
There is usually water left in hollow core slabs, and if it hasn't been drained during construction, it can remain.
It is unlikely to be a drain. Where is the wet area and the pipes located in relation to where you drilled?

I drilled in the living room on the outer edge of the bathroom.

In this apartment, the kitchen was a bit more offset now that I think about it.

I have done it several times before in similar newly built apartments without issues.

 

[Installation]

I drilled in the living room on the outer edge of the bathroom.

In this apartment, the kitchen was a bit more offset now that I think about it.

I have done it several times before in similar newly built apartments without any issues.

It does look like a pipe where you've chipped away the concrete.

 

[Claes Sörmland]

Why hollow core slabs? Isn't it just a regular cast concrete slab where the pipe ended up a bit too close to the neighbor's client's roof? That might be the case in the million program and perhaps earlier than that. It often comes up in threads about thin concrete slabs that cause issues during bathroom renovations and related frog switches on this forum.