New to the site here and looking for some advice. I'm looking to refinish a sunroom floor with porcelain tile. Currently the floor in the room is split with half being concrete slab and the other half exposed aggregate. The concrete is somewhat new and the aggregate from what I can tell was put in twenty-five years ago when the house was built. How do I prep the floor for tile? Is the prep different for concrete than the aggregate? Can I lay tile right over it? Any info is appreciated. Thanks.