I am learning a good way to handle shower curb (wood). I found there are three ways to take care of a shower curb:
1. waterproof membrane with lath, then tiling on the top of it with thinset;
2. waterproof membrane with plastic U cover, then tiling on the top of it with thinset;
3. waterproof membrane, then tiling on top of it with thinset;
I can see the #1 option is better. #3 is better than #2 if the membrane is not a regular smooth plastic membrane, like Oatey, I think.
Basically the tile need to be bound well with the curb. smooth U cover and smooth plastic membrane will not help on the purpose. Some membrane like Kerdi and NobleSeal TS are not smooth surface but with fabric hairs which will be a good way to go with #3 above.
What's your opinion?