Just wondering if its ok to put Durock directly over drywall? It would make the job a lot faster and less messy, but just not sure if its ok to do that or not? Anyone have any thoughts or? I always appreciate any advice I get here, so thank you in advance. I plan to just trim out the edge where it will project from the wall, about a half inch also, and yes this is a bathroom, a second one in basement. I also plan to put porcelain tile over the durock.