Hi All: We renovated our third floor bathroom which included stripping the floor down and installing tiles (1" squares within 1' blocks). After our 3rd floor tenant takes long showers we get some leakage through her floor and thusly through our ceiling (which we now have partially open to have access). We are almost 100% certain that this isn't a plumbing leak as such, but instead due to overspray from actual showers (we recreated the problem only by dumping water on the floor up there--it isn't a leaky pipe).

Any ideas on a fix? We've tried re-calking, sealing the grout/tile, etc and the d*&%$ed thing continues to leak...

Thanks,

Randy

Ifit isn't a drain or grout leak then you got to be on the site to locate it. Sorry, Tom

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Originally Posted by speedball1

Ifit isn't a drain or grout leak then you gotta be on the site to locate it. Sorry, Tom

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Thanks for the feedback--yeah, it only happens after the tenant showers so we're pretty sure overspray is puddling then finding the lowest point and then coming through. Re-calking where the floor tile meets the wall tile?

On a complaint such as yours the first thing I would do is locate the source.
Likely spots are, where the shower stream hits the tiles the grout may have shrunk allowing water to enter above the shower pan lip and running down inside the walls. A slow drain could allow water to puddle and build up in the shower floor and find a opening at the lowesr point. If there's a shower door it may nhot have a good seal and if no shower door then the overspray could be getting outside the confines of the shower enclosure. It's not easy tracking down a "mystery leak". It has to be done on site by the process of elimination. Good luck, Tom

In this world where there is no system to train people how to do things many projects around a house get done wrong. I am now trying to fix something similar. The shower door was put in backwards. You can't have the opening that swings out in direct line with the shower spray. This is an invite to disaster. The shower spray needs to be at the very least directed towards the side where the hinge is. It would be best if the shower spray was not in the direction of the door but in most cases that is not possible. Many contractors only think of ease of entry not what will happen to the floor when it gets soaked repeatedly. To find this leak you need to open the area below the shower and actually see where the water is coming from.

I hate to assume so I won't did you seal the floor grout?