I'm removing the cement board to make tiling easier. I've so far removed two walls. The third wall however is the one with the shower head and controls on it.
I rubbed away a bit of cement board (to make a hole for a saw), and I noticed this one is different from the other two. It appears their is a wooden board underneath the cement board.
From what I've read, this isn't normal, and may be detrimental (breath-ability?). Does anyone know why this may be the case? Should I remove this board as well, or should I replace it with another board?
Edit: I've removed some of the cement board. No adhesive is between the cement board and the wooden board.
Thanks, Justin W.