Installation Guide

INSTALLATION INSTRUCTIONS
Start by digging a shallow trench
4"(102mm) deep by 12" (305mm)
wide. Cut through and remove any
sod, roots or large rocks. For organic
loam soils, dig 4" (102mm) deeper
and add a leveling pad of sand or
gravel. Compact and level the soil to
receive the first course of
Wall Block.
Place and level the first unit. Level
each additional unit on the base
course as you place it, making sure
that the outside edges touch. If
your wall contains both straight and
curved areas, start with a straight
area and build into the curves.
Complete the base course before
proceeding to the second course.
Starting with straight areas first,
begin placing the second course.
Center each unit on the seams of
thecourse below in a running bond
pattern as shown. Now proceed
to the next layer, backfilling as you
go. For drainage behind the
wall, clean gravel or crushed stone is
recommended
LANDSCAPE WALL | 4-IN X 11.5-IN WALL BLOCK
Use clean granular backfill such as gravel or crushed stone for drainage and to
prevent soil from leaching through the wall. A commercial filter fabric (stocked by
most garden supply stores) may be used when existing site soils are used for backfill.
Curves as small as 2'–2" (660mm)
in radius can be built with
4-in x 11.5-in Wall Block. Convex
& concave course bonding
will adjust sideways. If stack
bond occurs, remove rear
interlock lip as shown or cut
units accordingly to get back to
running bond.
Building Curves
Typical Wall Section Remove Edges
To remove outside lugs or edges of retaining lip,
hold unit securely or place at angle on ground.
Strike the lug firmly with a hammer. Always wear
safety glasses to protect eyes from chips.
Minimum radius
at top of wall 2'-2"
(660mm)
1. Prepare Wall Location
2. Place & Compact Backfill
3. Install Additional Courses
9"
(229mm)
4"(102mm)
4" (102mm)
Base leveling pad of free
draining granular material
Clean
granular fill
Setback
©2017 Keystone Retaining Wall Systems LLC
Keystone Retaining Wall Systems LLC • A Contech Company
4444 West 78th Street • Minneapolis, MN 55435
[phone] • www.keystonewalls.com