How do I extend an existing shower pan?

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  #1  
Old 01-21-09, 01:51 PM
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How do I extend an existing shower pan?

Ok. I have been researching high and low on how to extend my shower pan without any real luck. I have a 3 ft x 3 ft shower with a curb. I have room to extend the shower to make it more like a 3 ft x 5 ft shower, which should be able to make it doorless which is what the wife and I want.

Now here is the question. I do not want to rip up the existing shower pan and start over from scratch. Could I: Option "A" demo the curb and extend the shower pan using Portland Cement and Redgard or PVC liner? Or: Option "B" would it be smarter to extend the curb to create a two foot sloped "landing" which would be the same height as the curb to serve my purpose. I intend to tile over the existing tile in the shower pan but I am concerned with everything being water tight if I go with Option "A".

Suggestions? Thanks!!!!
 
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Old 01-21-09, 02:26 PM
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This seems pretty shotty to me.

They have adhesive meant for PVC liner to extend it, but you will have to tear out your tile in order to bond it, and it needs a clean surface.

Also, the pan liner needs to extend up about 6-8" above the floor onto the studs, which would require remove wall tile.

I think your only good option would be to tear it all out.

I would never recommend tiling over existing tile, especially for a shower floor. How do you plan on dealing with the drain?
 
  #3  
Old 01-21-09, 05:17 PM
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Hot....Thanks for the response. I forgot to mention that I have already pulled most of the tiles off of all the walls. I am doing a total re-tile job on the entire bathroom but I am also trying to be extremely cautious as to not make any mistakes. As for the drain, This Old House recommended this product Shower Installation: Extend-O-Drain System for this exact application. Never seen it before, but I hear that it works.

Since the wall tile will be off, is it conceivable to knock out the curb, extend the shower pan, build the new curb, Redgard the crap out of bottom two feet of the shower walls and shower floor, and then mud and tile over the entire project?
 
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Old 01-21-09, 05:46 PM
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Anything is possible really, and it's really up to you.

If you have most of this shower torn up, just tear the pan out. Making a new mud pan is dirt cheap, literally, and it will make you sleep better.

No need to RedGard the shower floor. The moisture will soak down through the top mud bed and onto the liner, where it will drain through the weep holes of the shower drain.
 
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Old 01-22-09, 03:41 AM
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I have seen plumbers seam these liners and not have any probs.Do'nt know about the pond liners but if holds up outside then sounds like a good peice of rubber to me.



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Old 01-22-09, 08:41 AM
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Dillaheys

A couple of comments. For starters, typically, a doorless shower would be bigger than 3'x5'. Water spray goes a long way and what you are proposing is not big enough. Many that think that they want a doorless shower find out that its kinda cold without the door to keep the steam and heat contained. Additionally, without a curb, you'll need to have proper slope to the drain and you'll need to waterproof the floor outside the shower area as well. Typically, you want a shower drain centered in the shower floor. This is so you can get a uniform slope to the drain in all directions and a uniform level line where the bottom row of tile begins. Piecing the shower pan as you suggest will likely prohibit you from accomplishing some of these things. You've demoed a good deal of the shower already. I'd go the extra distance.
 
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Old 01-22-09, 10:09 AM
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Thanks for all of the replies thus far!!!!! I am extremely appreciative! After much thought, I believe that I will most likely go with leaving the white tiled shower pan in place since it ain't broke and just re tile from that point up. It will look fine enough to work for me and the wife will just have to deal with it. I will purchase a frameless shower door and install that instead of messing with the curb stuff.

Any other suggestions are always welcome!!!!!!
 
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