My shower drain in a custom ceramic shower had been leaking and I opened up
the ceiling below it and need some advice on how to repair it
only seems to leak after a lot of water has been run and I can also cause
it by stopping up the drain and allowing some water to pool in the bottom.
It appears that the water is seeping around the outside of the drain as
opposed to the drain leaking .
I have photos here of both the top and bottom view
When I get it to leak the water comes from the plywood around the drain
assembly which has me wondering if its seeping through the grout. I'm
wondering if I could apply a waterproofing agent on the tiles and grout to
fix this . I really don't want to rip up the time if possible
Thanks in advance
Generally any "stop gap" attempt at fixing this will not work. Water
getting through the grout is expected. There should be some type of
pan liner underneath it all that guides this water into the drain.
From the photos it doesn't look like a good install.
Sorry for the bad news.
In my last house, upstairs shower in the MB had a tile surround shower.
The bottom had a pan and poured cement base. No leak in 20 years I lived
there. This house has multi-head shower upstairs. It also has fiberglass
pan and poured cement base. Even I can jump up and down in the shower.
No sign of any leak in more than 10 years. All custom built houses per
my spec. If floor flexes, leak will spring.
Thanks for the suggestions I find it hard to believe its a design issue. I
bought this house from the builder who built it for himself when he and his
wife divorced . This place has every toy including Natural gas generator,
built in home theater, even has a remote control for the irrigation system.
3 92% efficient GAS furnaces with AC
I'll try regrouting and see what happens
I should mention this is a very minimal leak if somebody takes a half hour
shower I get a few drops If not for the stain on the ceiling below I would
never have noticed it
I also suspect leaky pan. Happened to me after less than a year when
house was new. Pans often get punctured during construction and it can
take months for leak to show up. In my case tiles and pan were replaced
under house warranty. Later I had to redo entire shower as chintzy
builder had put wall tiles on plain drywall.
Nobody wants to rip up their shower stall, but unfortunately that is the
correct path to fixing the problem. As the others have suggested you need a
good solid base and a pan underneath. You can caulk and grout the hell out
of it, but I doubt if it will do much. I would save the time and money and
start planning a new shower stall. Maybe you can get away with just redoing
the bottom and a few tiles up. Call a plumber and ask his opinion. I
suppose it is possible that the plastic drain may have cracked, but what
would have cause that besides a flexible floor. The black mold away from
the drain tells me the water is coming from the floor.
First get rid of plywood and go concrete as it is much more solid and
less prone to seepige if done right. Have installed 50 plus and yet to
have one leak. Also put a liner as this manditory for a stall. Extend
it 12 inches to 18 inches minuim up the walls then use a good tiler
who can do it right cost but should be right.
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