County Materials has added a new and functional Top Block unit size to the company’s Rib Rock Landscape Block product line. Rib Rock Landscape Block are oversize retaining wall units that offer accelerated installation to meet tight construction schedules by covering 8 sq. ft. per block. Available in standard gray, units can be custom stained onsite by an installer to match your design needs. The new Top Block unit can be used to finish a Rib Rock wall in place of the traditional cap units, allowing the ability to fill the back of the block with soil for planting or landscape rock to achieve desired aesthetics with ease.