I am setting tile on an outside patio that is on the second level of the house. The patio is a concrete slab that is completely level. I need to know what kind of concrete to use and how to go about diverting all the water so that it will drain properly

Slope between 1 in 60 cm to 1 in 100 cm is ideal depending if tiles are rough or smooth bed on a mix or 5-1 sand cement for less than 1" tiles or for indian stone a more robust mis using crushed stone (dust) 3 parts, 2 sand,1 part cement and add some plasterciser it will make a better smoother mix

From create-a-scape landscapers pembrokeshire