Thread: Shower Remodel
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Old 05-26-2017, 09:26 PM   #5
Veteran DIYer- Schluterville Graduate

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Join Date: Jul 2004
Location: Nashua, NH
Posts: 12,794
Most people prefer the level perimeter. It becomes less noticeable when the wall tile are larger, but that may or may not be your preference. A typical linear drain system does not have a level perimeter, but that single slope has some symmetry to it, which may mask the issue.

A conventional shower construction's just that a surface applied membrane works better, IMHO. Keep in mind that there's no really good way to tie a liquid applied membrane to a conventional clamping drain. Should you decide to use RedGard as your waterproofing, read, understand, and strictly follow their shower build instructions.

Once you have a preslope and a liner down, the setting bed is installed so that it is all an equal thickness. But, because what's underneath is sloped, it all works. That unbonded layer needs to be fairly thick - again, industry wants a minimum of 1-1/4" thick. Some recommend less. The industry guideline is safer, not saying thinner won't just has less of a chance than a thicker layer. Most mud manufacturer's instructions follow the industry guidelines.
Jim DeBruycker
Not a pro, multiple Schluter Workshops (Schluterville and 2013 and 2014 at Schluter Headquarters), Mapei Training 2014, Laticrete Workshop 2014, Custom Building Products Workshop 2015, and Longtime Forum Participant.
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