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cabot 10-15-2012 01:56 AM

Shower Pan Installation - Help!
Okay, I have done my share of reading on this subject, but have yet to find an answer that is on point (one was close).

I poured a pad in my basement. The pad has a recess for a shower because I want a cureless shower (the space is small). The recess is about 2" on three side and 1 1/2" on the open side where I have a glass enclosure.

Now for my questions:

1. Is it possible to build the base slope using a thin cement - with the 1/4 inch required slope and go to zero toward the drain, this will take up about 1/2 inch of the recess. This would then leave me approximately 1 inch for the dry cement over the membrane. The base is 4-5" of concrete and stable.

Is there an alternate way to do this? I really don't want to use a store bought custom pan because they are too expensive and the drain will not match up to the standard sizes.

2. If I am able to work the pan into the recess, how do I connect the membrane with the floor of the bathroom? I know that some water will end up on the tile outside of the shower. Should the membrane be overlapped under the first few tiles? If so, how do you thinly cover the membrane so that there is not a noticeable difference between the first few towels and the rest of the floor? Do I have to waterproof the entire space? Does the remaining space have to have a slope toward the shower?

I have a height restriction in the basement and cannot raise the base floor too much. If I put the membrane over the entire area and have to cover it with 1" of cement, it will be too high.

If someone can manage a solution, you will be held in high regards!

oh'mike 10-15-2012 05:03 AM

You are a prime candidate for a Hydroban shower---

Google Hydroban by Latacrete----this is a paint on membrane that will seal the deck mud and cement board and give you a safe shower system without the liner under the pan----

I've used this for barrier free showers below grade ---it's a fine product and very easy to use----if this sounds interesting--I'll walk you through the process.

cabot 10-15-2012 11:57 AM

Shower Pan
Hello and thanks for the reply. I looked at the website and definitely interested in this method. Can you walk me through the install.

There are two items to consider (I'm not an expert when it comes to concrete):

My drain is offset. The shower recess measures approximately 52" x 37". The centerline of the 2" PVC drain is 17" from the short side and 17" from the long side.
| |
| |
| |
| 37" O ---17"-->
| | |
| 17" |
|____________ |________|
Open End to Bathroom

I also found Schluter-KERDI-SHOWER-KIT that says if you are offset, you can cut the tray and fill the gaps with dry cement. However, the Schluter system is about $600. I'd rather get a larger piece and cut the sides - it seems that the Hydroban system may allow for this, and at a more reasonable price.

Also, what about meeting the floor of the bathroom (open end). I am at 1 1/2" to 1 3/4" how do I ensure a smooth and waterproof transition. Do you know the thickness of the Hydroban material (not on website)? I believe the KERDI is 1 1/2"

Thanks again for your insight and I believe we are on the path to success!

oh'mike 10-15-2012 08:05 PM

A picture of what you have,so far would help-----I would use a Schluter or Latacrete drain---and do a bed using deck mud---

Mesh the pan to the wall using tilers mesh---coat the mesh with modified thinset--then paint the entire shower---wallls andfloors with three coats of Hydroban---If it's acurbless design I might seal the bath floor and lowere few inches of the walls near the shower--

Then tile it---

I lost my links---(computer crash) someone here should be able to get you a link to mixing deck mud---

I've made a few of these---good use of Hydroban---safe when done correctly---

cabot 10-15-2012 10:26 PM

Alternate Approach
Thanks for the reply! I spent a good part of the day researching and have discovered an alternate approach which, if accurate, will solve the problem.

First, I noticed that you can extend a Kerdi base with mud and cover both the extension and the base with Kerdi membrane. This got me thinking...I then found another blog that discussed laying one thick layer of sloped mud and then covering the entire section with the Kerdi membrane. This appears to be a solution I found on a couple of sites and also discussed with Kerdi.

This approach essentially eliminates one of the two mud beds.

What do you think?

oh'mike 10-16-2012 01:13 AM

I guess I confused you---You don't need a liner with hydroban---thus---only one bed of mud---

Kerdi works---perhaps that's your ticket---

pwgsx 10-16-2012 08:11 AM

Yep, only one slope using deck mud ( spread a thin layer of thinset on your foundation before adding the deck mud) and then hydroban the whole shower once dry. I would use the "divot" method around the drain. Check this out and search the liberry for ideas

If you need any other help, PM me, I did this same method and it was super easy, and have pics to show.

oh'mike 10-16-2012 10:56 PM

Interesting link----thanks

cabot 10-16-2012 11:15 PM

I think we have it solved!
Thanks so much for the insightful replies.

As mentioned on the original post. I hold you in high regard for coming up with a solution!

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