Does water drain through the sand between the paving stones?

Initially, some water will seep into the joint sand for the first few weeks but soon silts and dust in the air will fill any voids and water will then shed off the paver surface just like any other pavement. During installation a slope (or fall) needs to be designed into the base course of your paver project for water runoff. Typically, it is recommended that you allow for a slope of 1 inch for every 8 to 12 feet of paving to provide drainage away from your home.