How to Build Retaining Wall

ROXBlocks, Castlestone, and Yardstone are easily installed retaining wall products. ROXBlocks are durable and stable stacking stones that provide a natural stone look, while Castlestone and Yardstone products are versatile and they come in a variety of colours.

 

Materials Required:

  • Road crush (¾”) or a comparable compactable gravel
  • Adhesive (PL 400) or mortar
  • Shovel
  • Level
  • Tamper
  • Wall material, either:
    a)      ROX Blocks and sand
    b)      Castlestone
    c)      Yardstone
To estimate the amount of required wall material:
 
ROX Retaining Walls
 
1)      Design the shape of your wall and measure its length in inches. 
 
2)      Divide the total length of the wall by 20 to determine the number of 20 inch blocks you will need for each row. 
 
3)      Determine the wall’s height. ROX Retaining Wall can be a maximum of 6 rows (24 inches) tall.
 
4)      Multiply the number of blocks per row by the number of rows to calculate the total number of 20 inch blocks you require.
 
5)      Calculate the number of 10 inch blocks you will need and subtract this number from the number of 20 inch blocks you require. You will need two 10 inch blocks for every other row so that the joints between blocks in your wall will be staggered. Also, if your wall will have tight curves, replace 25% of the 20 inch blocks with 10 inch blocks. 
 
6)      Capstones will be attached to the top of the finished wall in a pattern that alternates between stones of 10 and 16 inch lengths. To calculate how many caps you require, divide the length of the wall by 26.
 
 
 
 
Castlestone and Yardstone Retaining Walls
 
These can be built two different ways: with the stones front faced and gaps at the back, or with alternating stones (no gaps will be visible). The maximum height for a Castlestone wall is 36 inches (91 cm) and the maximum for a Yardstone wall is 20 inches (51cm). 
 
Use the charts below to determine the number of blocks you will require to build the wall. (You will also need 1 additional row of caps to finish the top of the wall. Caps are the same size and shape as the standard stones.)
 
 
CASTLESTONE ESTIMATION GUIDE
Wall Height
Wall Length
Front Faced (gaps in the back)
Alternating Stones
 
6”
12”
18”
24”
30”
36”
6”
12”
18”
24”
30”
36”
# of rows
1
2
3
4
5
6
1
2
3
4
5
6
5 ft
7
14
21
28
35
42
8
16
24
32
40
48
10 ft
14
28
42
56
70
84
16
32
48
64
80
96
15 ft
20
40
60
80
100
120
24
48
72
96
120
144
20 ft
27
54
81
108
135
162
32
64
96
128
160
192
25 ft
34
68
102
136
170
204
40
80
120
160
200
240
 
YARDSTONE ESTIMATION GUIDE
Wall Height
 
Front Faced (gaps in the back)
Alternating Stones
Wall Length
 
4”
8”
12”
16”
20”
4”
8”
12”
16”
20”
# of rows
1
2
3
4
5
1
2
3
4
5
5 ft
8
16
24
32
40
10
20
30
40
50
10 ft
15
30
45
60
75
19
38
57
76
95
15 ft
22
44
66
88
110
28
56
84
112
140
20 ft
30
60
90
120
150
37
74
111
148
185
25 ft
38
76
114
152
190
46
92
138
184
230
 
 

Procedure:

  1. Dig a trench that is 8 to 10 inches (20-25 cm) wide and 4-6 inches (10-15 cm) deep.
  1. Fill the trench with road crush.
  1. Compact the road crush and level the area to create a firm base for the wall.
  1. Lay a row of blocks/stones on the compacted road crush, ensuring that the blocks/stones are level and flush with each other.
  1.  Lock the blocks/stones into place.
    1. Use sand or soil to fill the gaps between and around the ROXBlocks.
    2. Use the locking mechanisms on Yardstone and Castlestone to locks them into place.
  1. Continue this process until the desired wall height is reached. To stagger the joints on a ROX Retaining Wall, start and finish every other row with a 10 inch block. 
  1. Place the cap stones on top of the wall, alternating between stones of 10 and 16 inch lengths, and apply adhesive (PL 400) or mortar to hold the blocks/stones in place.