Shower Stall Floor

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  #1  
Old 11-03-07, 07:40 PM
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Shower Stall Floor

I hope I have this post in the right place.

I am tiling my shower walls and intend to use a prefabed acrylic shower floor. The stall is 36x36 and the sub-floor is OSB and pretty stable; however, I am thinking if I place a piece of concrete backerboard under the shower base it would provide more support. Thoughts please on whether you think this is necessary.

Thanks so much.
 
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  #2  
Old 11-04-07, 10:17 AM
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Backerboard won't provide a much (if any) additional strength. If all you have is a 1/2' OSB subfloor you'll probably get some flexing. Adding 3/4" plywood on top will help provide support, but you'll also have to add some framing to nail it off. Bed the shower base in mortar to keep it from flexing.
 
  #3  
Old 11-05-07, 07:22 AM
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Thanks, bedding it in mortar seems to be the best way.
 
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