I would like to install engineered flooring on top of a ceramic tile covered concrete floor. This is in an enclosed and heated porch, there is no moisture problem. I'm planning to apply a skim coat to make the floor flat. What kind of leveler or thin set should I use to do this? Also What kind of glue should I use to adhere the flooring to the flat surface? The engineered flooring has a wood layer on the bottom. I do not like the feel of a floating floor. So I want to glue the flooring directly to the skim coated surface.