Steam Shower. Kerdi vs AquaDefense advice needed
I'm about to remodel my master bath. I've got bad arthritis so I think I want to invest in a steam shower.
After using the Internet to research it seems the consensus is that Kerdi is an excellent choice to water/vapor proof the enclosure.
I've used one tile guy for a number of years and when I asked him about it he said he has built a number of steamers and is familiar with Kerdi by prefers using liquid (he mentioned AquaDefense).
His description of using liquid waterproofing was "Everything in the process is basically the same except for the waterproofing which gets two coats of liquid over underlayment and fabric in the corners to seal completely."
Should I be comfortable with this? Or, should I ask him to use Kerdi? Or should I look elsewhere? I've been very happy with him in the past. He's got over 30 years experience in tile setting.