What should the slope be on solid surface (tiled) balcony be? The homeowner is concerned because he believes the patio slopes too much. He’s had no luck getting the builder to change anything (it was be a very expensive undertaking at this point). In the attached photo, you can see the balcony from a distance. I measured it and it has a slope away from the house of 1.25 to 1.5" over a 4 foot span. That equates to a maximum of .375" per foot. Is there any code that addresses this?