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Unread 02-09-2014, 12:27 AM   #1
blondjen
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Shower drain leak. Need advice

We have this shower pan installed thrice already. The first time when it was installed, we wanted to use pebble rock and the guy who did it didn't have much experience with it - so the pan had some low spots that left some puddles. He thought he can totally fix it the second time and it wasn't any better than the first time.

Now, the third time when we had this pan installed, we changed the rock to the flat rock. The installation went okay but when we turned the shower on yesterday, we realized the drain is clogged with mortar. Soon after the basement ceiling started leaking.

We cut the drywall open in the basement to see where the water is coming from and we could see it was right underneath the drain joint - Where the black funnel like thing is sitting.

Now what are our options ? We are going to cut the p trap in the basement and replace it with a new piece. Thats the easy part.

How do we fix the shower drain itself without taking the whole floor apart ?

Please advice. We are pretty devastated.

Thanks
piri
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Unread 02-09-2014, 01:00 AM   #2
Higher Standard Tile
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Do you have any pictures or details of what waterproofing membrane was used and how it was installed?
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Unread 02-09-2014, 01:11 AM   #3
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Yes. First, the rubber membrane from Home Depot went it. Then the mortar was poured.
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Unread 02-09-2014, 05:48 AM   #4
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Quote:
Originally Posted by piri
We cut the drywall open in the basement to see where the water is coming from and we could see it was right underneath the drain joint - Where the black funnel like thing is sitting.
I'm not exactly sure what you mean by this part, but it sounds like maybe when the drain was attached to the riser (that's the straight 2" pipe that comes up almost to the subfloor) it wasn't glued properly, or something of the sort.

If that's the case, I would remove the riser and P-trap and replace them. Be careful when attaching the riser to the drain that you don't put so much force on it that it pushes the pebbles up.

That's just a guess based on your description. If you could attach a picture indicating where the leak is coming from, we might be able to offer some other advice.
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Unread 02-09-2014, 08:48 AM   #5
Richard Tunison
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Hi Piri and welcome.

Are you saying that the pan liner is installed directly on the plywood without a preslope underneath it?
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Unread 02-09-2014, 09:49 AM   #6
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Yes. The pan liner was installed directly on the subfloor.
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Unread 02-09-2014, 10:26 AM   #7
Richard Tunison
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You can see by the diagrams that a pre-slope is mandatory to get water that gets through the floor to the drain and into the weep holes. Anything less and you basically have a swamp under the floor tiles.

Sorry for your troubles.
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Unread 02-09-2014, 10:49 AM   #8
madmantrapper
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This does not surprise me, I'm seeing it more and more in new homes. I was in two last week in the same development being done by two different contractors where the preslopes are being ignored. I mentioned it to one of the contractors and his reply was a 1/4 inch of water is not worth the trouble, couldn't believe my ears.
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Unread 02-09-2014, 12:23 PM   #9
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also did they mud over the curb or nail cbu into it? Seriously though if the guy couldn't do it right the first time that should be a big red flag for you. Cheapest installer not always the most cost effective way to go.
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Unread 02-09-2014, 01:37 PM   #10
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Taking a look at your first picture again: What are we looking at there? Is that the upper part of a clamping drain? I'm wondering why I'm seeing what appears to be subfloor and something else in there?
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Unread 02-09-2014, 02:15 PM   #11
Davy
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Kevin, I think that's the top part of the clamping drain. It has the strainer removed.

Like Robo asked, how was the curb built?
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Unread 02-09-2014, 02:40 PM   #12
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If you say so, I believe you. It just didn't look like the inside of any drain I've ever seen.
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Unread 02-09-2014, 02:52 PM   #13
Davy
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I've seen some like that, they are usually white. The two small screws holds down the strainer.
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Unread 02-09-2014, 11:00 PM   #14
blondjen
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yeah. it is the upper part of the clamping drain.

The curb was built with 3 2x4 stacked. Is that the right way to do it ?
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Unread 02-09-2014, 11:15 PM   #15
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Could be, if it's done properly. Typically, you would turn the liner over the curb, stapling it only on the outside. Then wire mesh would be formed over the curb, and fat mud would be used to form the curb over the mesh.

Many times, it's improperly installed wherein the installer nails cement board on all three side of the curb, puncturing the liner with nails or screws. The punctures allow water to get to the 2x4's, which eventually cause the wood to expand and the grout cracks. Then it gets worse from there.

Hopefully, yours was done properly.
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