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> WALLSTONE

WALLSTONE INSTALLATION
Wallstone™ has been designed to meet the demands of the landscape gardener or DIY homeowner for small decorative
retaining walls up to 800mm in height.

Wallstone™ has many of the features of other systems but with the added advantage of choice between a vertical wall or
a setback wall. Wallstone™ gives a contemporary feel to an extremely flexible system, encompassing straight walls, convex
or concave curves, right angle corners and formal stairs in 150mm step heights. The radius of convex walls can be as little
as 2400mm and concave walls 2100mm, while the standard and tapered units can be mixed to achieve appealing designs.
Pins, clips or mortar are not required. A compacted gravel-leveling pad is sufficient in all Wallstone™ applications.



WALLSTONE LAYING INSTRUCTIONS

Step 1:
Dig a shallow trench, level and place 100mm of crushed rock in the bottom. Level and compact. Allow for 75mm
embedment of the bottom course and 300mm behind the wall for drainage.

Step 2:
Spread and level approximately 25mm of coarse sand as a bedding layer then place the first course of Wallstone™.
Use a stringline for creating a straight line, and level from side to side and front to back. Install a 90mm Agricultural
Pipe (on grade) at the rear of the wall for drainage.

Step 3:
Fill behind each course with granular rock for drainage and carefully compact. Check each course is level before
proceeding and stack each additional row offsetting from the block below.

Step 4:
On the last course of stacking units, place a line of adhesive front and back and place the capping unit. Apply
pressure to secure and use a stringline and level for the best result. NB: Slope the soil above and below the wall
to ensure that water will flow away from and not accumulate near the wall.
• It is advisable to place a dob of adhesive between corner units.
• If a vertical wall is required then follow the same instructions but remove the narrow section at the top of each
• unit using a hammer and bolster.


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BUILDING STEPS WITH WALLSTONE
The versatility of building steps is only limited by your imagination. Steps can be designed with flowing curves or with
right angles.

The simplest step design combines Wallstone™ standard units with corner units and Wallstone™ capping as step treads.

Alternatively, C&M bullnose pavers may be used as step treads.


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TYPICAL CROSS SECTION

MAXIMUM HEIGHTS (BEFORE CAPPING)
Wallstone™ Solid: Vertical Wall - 750mm; Setback Wall - 900mm
Wallstone™ Hollow: Vertical Wall - 600mm; Setback Wall - 750mm

These heights apply where ideal site conditions exist, ie. no surcharge loading and site soils consisting of rock,
gravel or sandy gravel (not sandy or silty clays).

Typical Surcharge Loadings Are:
• Wall supporting a driveway or any other load
• Greater than 3:1 slope above the wall
• Another retaining wall above the wall which is less in distance behind the wall than double the height of the
• lower wall.

If a wall exceeds the maximum recommended height or a surcharge loading applies please ask C&M for help
or consult an engineer for design.


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TIPS & TRICKS FOR RETAINING WALLS
• Start at the lowest point, or start from the corners & work out from there
• Make sure all walls are locked in & pushed forward. Then fill & compact before gluing & applying capping units
• There is no such thing as too much drainage
• Never cut corner units, always blocks if need be
• Use short screed bars in your trench. This will make it easier & quicker to prepare base course.

NOTE: Ensure you order all you need at once & include an allowance for breakages & cutting.

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