I'm renovating a house and am getting close to installing the flooring. The original pine plank flooring is going to be the subfloor. Over that will be 3/4" hardwood throughout, with tile in the bathrooms. I'm looking for the best way to get 3/4" thickness in the bathroom. I don't have specs on the specific tile, but I will work on getting that. It's going to be a standard porcelain tile. I'm thinking 1/2" CBU over the pine, plus the tile should be just right, but I'm looking for thoughts from more experienced flooring installers. I'd like to get the CBU down before the hardwood.