CONCORD WALL™ Coping | Unilock Boston
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After many years of being the go-to residential concrete wall product for contractors across North America, Concord Wall has earned its place as one of the best designed modular walls on the market. Whether you’re building low planter walls or a 16 foot high wall holding up your client’s swimming pool, Concord Wall delivers on both appearance and structural capacity. ConcordXL is a slightly longer block which boosts installation productivity especially when a UniLyft is used. High wall engineering is provided.
Colors
Shape and size

XL WALL
400mm x 150mm x 300mm
15 3/4" x 5 7/8" x 11 7/8"

CORNER
200mm x 150mm x 300mm
7 7/8" x 5 7/8" x 11 7/8"

WEDGE CAP
248mm x 86mm x 330mm
9 7/8" x 3 1/2" x 13"

CORNER
200mm x 150mm x 300mm
7 7/8" x 5 7/8" x 11 7/8"

XL WALL
400mm x 150mm x 300mm
15 3/4" x 5 7/8" x 11 7/8"

WEDGE CAP
248mm x 86mm x 330mm
9 7/8" x 3 1/2" x 13"



XL WALL
400mm x 150mm x 300mm
15 3/4" x 5 7/8" x 11 7/8"

CORNER
200mm x 150mm x 300mm
7 7/8" x 5 7/8" x 11 7/8"

WEDGE CAP
248mm x 86mm x 330mm
9 7/8" x 3 1/2" x 13"

COPING 24"
600mm x 75mm x 300mm
23 5/8" x 3" x 11 7/8"

COPING 24"
600mm x 75mm x 300mm
23 5/8" x 3" x 11 7/8"

COPING 24"
600mm x 75mm x 300mm
23 5/8" x 3" x 11 7/8"

XL WALL
400mm x 150mm x 300mm
15 3/4" x 5 7/8" x 11 7/8"

CORNER
200mm x 150mm x 300mm
7 7/8" x 5 7/8" x 11 7/8"

WEDGE CAP
248mm x 86mm x 330mm
9 7/8" x 3 1/2" x 13"



COPING 24"
600mm x 75mm x 300mm
23 5/8" x 3" x 11 7/8"

Technologies
Applications
Fire Feature
Garden Wall
Outdoor Kitchen
Pillars
Retaining Wall
Seat Wall
Water Features
Recommended Equipment
Unilift
Technical information
  • Packaging
  • Things to know
  • Cross Sections
Select category
Packaging
  • Packaging
  • Things to know
  • Cross Sections
Unit Thickness (mm)
Layers per Bundle
FcFt per Bundle
FcFt per Layer
FcFt per Unit
Units per Bundle
Units per Layer
Lbs per Bundle
Lbs per Layer
Lbs per Section
Lbs per Unit
XL WALL
150
4
21.33
5.33
0.67
32
8
2,455
613.75
-
76.72
CORNER
150
3
15
5
0.83
18
6
819.99
273.33
-
45.56
COPING 24"
75
8
31
3.88
1.94
16
2
2,320
290
1,160
145
WEDGE CAP
86
8
64
8
0.67
96
12
2,544
318
-
26.50
THINGS TO KNOW

Concord Wall™

Concord Wall is the most versatile residential and commercial retaining wall block on the market today. Use Concord Wall to construct projects from low walls to high walls.

Applications – Design and build projects such as planters, steps, grill islands, pillars, seat walls and water features. Can be used for straight and curved installations (Radius 5’ is the tightest radius).

Capacity – Gravity walls up to 39” (1m). Geogrid reinforced walls up to 20 ft. (6.1m).

Recommended Base Stabilization – one layer of DriveGrid™ stabilization grid between subgrade and base material. Use under Standard Base or Permeable Base.

Standard Base – Min. 6” – 8” of ¾” Crusher Run gravel (any road base standard in accordance with ASTM-D2940) compacted to 98% Standard Proctor Density (SPD).

Alternative Permeable Base – Min. 6” – 8” of ¾“ clear open-graded stone compacted to achieve full particle lock-up and consolidation. (Clear open-graded does not compact but does consolidate slightly by rattling the particles together).

Leveling – Leveling retaining wall blocks directly on top of gravel is tedious and generally does not yield the best results. U-Grip Base units or universal base pads are recommended under all Unilock walls for improved accuracy and speedier installation. Additional benefits include long term structural integrity and an overall better appearance. Poured concrete leveling pads, reinforced with rebar, are also a great way to accomplish leveling, particularly for larger installations. You must ensure that the concrete is poured and finished perfectly in order to achieve a good visual appearance.

Connection – features a tongue and groove connection. Use appropriate concrete adhesive for connection between units where the key has been removed or for corners. Always read adhesive manufacturers’ directions prior to gluing.

Handling – No specific handling instructions.

Coping - This wall requires coping. Choose a manufactured coping such as Unilock Universal Coping or any of our natural stone coping options. Install with tight joints or 3/16” gap between units and amend with an exterior latex caulking. Cutting may be required; a diamond blade saw is required to cut coping properly. Glue all coping using a specially formulated concrete adhesive that is strong and will not break down over time. Always read adhesive manufacturers’ directions prior to gluing.