Planting Issues

Planting trees or shrubs behind the Keystone wall can be accomplished with a few simple considerations.

Plant small ornamental trees approximately 5'-0" (1.5m) minimum from face of wall to avoid root growth into drainage zone or surchase loading developed by wind load acting on the tree.

Plant large trees approximately 10'-0" (3m) minimum from face of wall.

Utilize a root control barrier as required to avoid root pressures or growth thru the Keystone concrete units. Note: If root growth pushes on Keystone wall during growth life of tree, Keystone units can be dismantled and relocated if property limits permit.

If the design includes irrigation lines, locate them directly behind wall units.  In this location, if there is a break in the line, the water will be noticed on the wall face and the path of excess water will be draining through the wall versus saturating the reinforced fill zone and adding hydrostatic load to the wall.