Quote:
Originally Posted by champion6
The lawn behind my house slopes slightly towards the lanai. It has never flooded in 3+ years. Keep this in mind: 1)the floor of the lanai is raised above ground level; 2)the soil is very porous and drains quickly; 3)if graded properly, the lawn should also slope gradually towards the sides of your house to direct water to the sides.
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Grades toward your house can be acceptable if there is proper grading over the entire lot, such as the slopes to the side that Champion mentions, connecting to side lot line swales to the street. If the slopes are subtle, the best way to be sure is to try to observe during a heavy rainfall.