A modular privacy fence, which includes a stringer having two rails, wherein at least the first rail comprises a plurality of fence picket dividers that protrude in a perpendicular direction from the first rail. The modular privacy fence also includes a fastener attached to the end of the stringer, wherein the fastener is arranged to secure the stringer to a fence post, and a bottom rail with a trough. In some embodiments, the second rail may also include a separate plurality of fence picket dividers that protrude from the second rail in a direction perpendicular to the second rail and parallel to the first plurality of fence picket dividers. In such arrangements, the first plurality of fence picket dividers is offset from the second plurality of fence picket dividers in a direction parallel to the first rail.