15" Coffee Creek 3-Piece Random Bundle Olde Quarry Wall Block |  1574WT0026622-0

Key Features

• Connection - mechanical (use plastic insert provided) or adhesive, make sure surface is clear of dust before gluing, always read adhesive manufacturers directions
• Recommended base stabilization one layer of DriveGrid™ stabilization grid between subgrade and base material
• Standard base - minimum 6 to 8 in. of 3/4 in. crusher run gravel (any road base standard in accordance with ASTM-D2940) compacted to 98% standard proctor density (SPD)
• Alternative permeable base - minimum 6 to 8 in. of 3/4 in. clear open-graded stone compacted to achieve full particle lock up and consolidation
• Levelling - levelling retaining wall blocks directly on top of gravel is tedious and generally does not yield the best results