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  • Castlestone
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  • Rockwood retaining walls
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      Install Tips
      How to estimate & install Castlestone (max 48" in height)
     
    Step 1
    Estimating & Ordering

    Estimating is easy with Castlestone. The same size block is used for the base, the wall block, and the capstone block. Vertical walls can be built to a maximum of 8 courses or1220mm (48" including base course).
    Method A
    Straight or curved
    (with gaps at back)
    Method B
    Straight or curved
    (without gaps)
    WALL HEIGHT
    WALL LENGTH
    Course

    1
    2
    3
    4
    5
    6
    7
    8
    mm

    153
    306
    459
    612
    765
    918
    1071
    1220
    Inches

    6
    12
    18
    24
    30
    36
    42
    48
    1.5m
    (5')
    7
    14
    21
    28
    35
    42
    49
    56
    3m
    (9.8')
    14
    28
    42
    56
    70
    84
    98
    112
    4.5m
    (14.8')
    20
    40
    60
    80
    100
    120
    140
    160
    Back

    Top View         Front



    Face View - Uniform
    WALL HEIGHT
    WALL LENGTH
    Course

    1
    2
    3
    4
    5
    6
    7
    8
    mm

    153
    306
    459
    612
    765
    918
    1071
    1220
    Inches

    6
    12
    18
    24
    30
    36
    42
    48
    1.5m
    (5')
    8
    16
    24
    32
    40
    48
    56
    65
    3m
    (9.8')
    16
    32
    48
    64
    80
    96
    112
    128
    4.5m
    (14.8')
    24
    48
    72
    96
    120
    144
    168
    192
    Back

    Top View         Front



    Face View - Random



    Step 2
    Excavation & Base Preparation


    Excavate a trench for the base course to a depth of 250mm (10" below finished grade--ensure topsoil is removed). The trench width should be 300mm (12"). Spread 150mm (6") of crushed gravel in the trench, leveling and compacting it to provide a firm base for the wall.


    Levelling Tip: Place screeding guides approximately 100mm (4") below the final grade. Fill with the base material and screed to level.


    Step 3
    Base Course & Wall Construction


    Start placing the base course at the lowest grade point.

    Check alignment and levelling of base course and adjust if necessary.

    Continue with additional courses, backfill behind the wall with granular fill as you go. Fill after every second course.

    Remember, when wall layout requires gaps between pieces--the cap stone pieces will also have gaps.


    Helpful Hint: Castlestone modules are designed to construct small radius curves without cutting. Each piece is reversible and therefore works for inside or outside curves.


    Step 4
    Curves & Corners


    Solid straight wall sections are easily achieved. Simply reverse alternate pieces.

    Construct 90° curved corners and circles by placing the small side of the block to the rear of the wall.


    Just curve it! That's the beauty of Castlestone... We recommend designing curves that closely fit Castlestone angles. However, to eliminate cutting, the backs of blocks may be gapped to generate any diameter.



    Simply gap the back of blocks as desired to create larger radius curves and desired wall alignment.
    The freedom is unlimited!


    Step 5
    Cap Stone Installation


    Using the smooth-top Castlestone, place construction adhesive along the last course and secure the cap stone in position.



    Step 6
    Step Construction


    Curved or half round steps can be achieved with Castlestone, by filling the tread with paving stones. See step 4 "Curves & Corners" for curve details.


    Construction Tip: For walls with steps, build the main wall and returns first, then construct steps.


    Step 7
    90° Corner Detail


    90° degree corners are constructed using the 9" and 6" corner pieces.

    Alternate the 9" and 6" corner pieces on each subsequent row and glue each corner unit in place with construction adhesive (see diagram).

    Copyright BURNCO Rock Products Ltd