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Old 09-20-2011, 03:56 PM   #1
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I am trying to fix the shower at work. It is on the second floor so the plumbing is accesible through the drop ceiling downstairs. The shower has not been used in more than 25 years. I cut out all the cast iron pipes which were completely obstructed (they looked like core samples) and replaced with PVC. My problem is the shower floor still leaks around the drain. I have read up on shower pan liners and attempted to replace this one which I assumed would be lead. But when I cut out the drain itself
and remove the tile and mortar all I see is concrete. No pan liner that I can discern at all. Right under the tiles was a perforated sheet (lots of uniform sized holes) then concrete. Looking at the hole where the drain was to downstairs.Dont even see the sub floor (wood). Any thoughts?

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Old 09-20-2011, 04:35 PM   #2
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Quote:
Any thoughts?
Yow...possibly not properly constructed by any standards that existed then or now. The warranty is probably gone too.

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Old 09-20-2011, 07:04 PM   #3
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I suggest you gut it and start over. Won't be too difficult
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Old 09-21-2011, 04:41 AM   #4
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Appears the floor is entirely made of poured concrete with rebar supported by steel I-beams. There is no wood involved. That being the case, I am thinking i should remove the tiles and grout and build up from there. This is to say, lay the shower pan liner over the concrete as though it were the wood sub floor, then proceed from there? Has anyone ever encountered this before? Any suggestions?
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Old 09-21-2011, 05:20 AM   #5
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Why not buy a fiberglass pan?
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Old 09-21-2011, 05:42 AM   #6
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I thought of that but its an unusual shape, I didnt see one off-the-shelf that would fit and I dont think a custom pan would meet budget approval.
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Old 09-21-2011, 05:49 AM   #7
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Hand packed bases coat about $150 in materials plus the tile---Building a shower pan with pre-sloped mortar bed, liner and curb.

Time to install and tile is another story.
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Old 09-21-2011, 06:01 AM   #8
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Its a shower at my job. I want to fix it because my house has flooded three times in the last two years and this would be a convenient place to shower while I am "between water heaters". My company will not spend more than $200 to repair.

I was thinking I would remove the tiles, lay down an acrylic shower pan liner with a new drain then lay mortar and tile over that. Maintianing the existing "slope".

Do you think this would / could work?
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Old 09-21-2011, 06:07 AM   #9
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No---This would, though--Hydroban by Latacrete----It is a paint on rubber waterproofing used for fountains,pools and showers.

I've used it and found it easy to apply ---you can tile right over it.
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Old 09-21-2011, 06:26 AM   #10
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oh'mike - Does this perform a similar function as red guard ? (and it is better?).

Thanks!
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Old 09-21-2011, 06:30 AM   #11
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So, rip up the tiles and mortar. lay down some concrete to fill in the gap left by removing the cast iron drain pipe, then spread some of this watertight stuff, then mortar and tile over that? Sound like a plan?
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Old 09-21-2011, 06:31 AM   #12
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Same idea as red guard----but a thicker and more elastic product.

I've used both and would trust the Hydroban on a pan---but not the Redguard--
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Old 09-21-2011, 06:36 AM   #13
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Pretty much---you need to get a Schluter drain --or a regular clamp type drain and a disk of flexible membrane ---Noble makes a disk for this purpose---

You must be able to seal the drain to the concrete pan with the hydroban.
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Old 09-21-2011, 06:45 AM   #14
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These are the three-part drains they sell in Home Depot, right?
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Old 09-21-2011, 06:55 AM   #15
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Correct---You need to clamp a disk of flexible membrane into the drain so that you can get a good seal on the pan/drain connection.

Go to the Latacrete site for instructions.

I'm headed for work---I;ll check back this evening---Mike----

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