We explain our customers that good drainage requires a minimum of 2% ‘fall’ for water to run off properly. What this means is that the grade (angle) of the driveway should have a ¼” decline for each foot of pavement. For example, a 10 foot wide section of asphalt should decline 2 ½” to have the water run off properly. Many driveways do not have this amount of grade and water ponds accordingly. There are a variety of solutions to this including drains, swales and curbs. In areas with less than 2% fall, ponding water is to be expected.
