Basically I'm getting a guy to do my tile around my tub/shower. He swears you don't need Redgard and we are on a tight timeline so applying it when hung would put us behind anyway (We really have 2 days to do everything). I have two questions.
1) Do I even need Redgaurd. The internet has mixed reviews. 2) Can I apply the Redgard BEFORE hanging the cement baord so we don't have to wait for them to dry once they are hung?