Thread: Shower
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Unread 03-24-2018, 08:55 PM   #6
Moderator -- Mud Man
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Join Date: Jan 2003
Location: Princeton,Tx.- Dallas area
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Ed, either one will work and the Redgard will be more expensive. But one thing I try to bring up is that the surface membrane will help when you are setting your tiles. Most cement boards are thirsty and will cause your thinset to dry out fairly fast after you spread it. Once the thinset is spread, you have to work in a hurry to get it covered. If it dries too much the tiles won't stick very well. The surface membrane will keep the cement board from drying out your thinset as fast. That's what I would do.

If there's a maximum curb length, I don't know what it is. I think you'll be fine as long as you anchor it well or pour a concrete curb.
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