In Des Moines, you woud be better served with 2 layers of paper and then lath/scratchcoat.
after checking around online it looks like perma base or Durock approves use for exterior. 2 layers of felt paper ( or Ice/water I suppose) liquid water proofer then thin set and brick. Any problems foreseen with this method?cibula11 said:Could I wrap in ice and water and use cement board or something similar? Is it drainage that becomes an issue with cement board vs. lath/scratch?