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Build Higher, Faster and Smarter with Keystone KeyMass®
4x Larger Than Standard Retaining Wall Blocks
Build cost effective engineered retaining walls faster and taller with Keystone KeyMass®. Designed to offer outstanding performance in gravity, no fines concrete, and geogrid reinforced applications, Keystone KeyMass® is our largest format concrete retaining wall block system.
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Complimentary Services
Book a Free Colour Consultation
Our expert team will help you select materials and finishes to match your style. This is your chance to bring your design plans to life and create the basis of your dream home. Enquire NowTry iVisualise - Virtual Design Tool
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Keystone KeyMass® has been designed as a simple system, with a standard unit for the face of the wall, corner units for 90 degree corners, extender units for use in wall designs and capping units to neatly finish the top of the wall.
Key Benefits
The Keystone KeyMass® retaining wall system is robust, strong, and available in flushface finish. This product is ideal for both straight and curved walls and suited for engineered walls up to 15m or higher in height.

1.
Cost Effective
Keystone KeyMass is made in Australia’s most advanced masonry production facility, which offers outstanding efficiency, quality and enables us to offer a more cost effective retaining solution for our customers.

2.
Faster to Install
Keystone KeyMass walls are comprised of large format blocks which are lifted into place using machines, reducing the need for manual labour and dramatically increasing speed of construction

3.
Build Higher
Build walls up to 15m with geogrid reinforcement (25m with project specific design), up to 4.4m with extender or no fines concrete reinforcement, or up to 1.2m in a gravity wall system.

4.
Hollow Core for Drainage
Easy Keystone KeyMass block features a hollow core to allow drainage through the blocks and to reduce the block weight.

5.
Design Flexibility
Keystone Keymass can be used on straight or curved walls and offers options to build with gravity, no fines concrete, extender, and geogrid reinforced wall system options.

6.
Build Higher with KeyMass
Extenders
Our extenders use a dove tail join to the back of standard KeyMass blocks, acting as an anchor to reinforce the wall and allowing you to build higher.

7.
Designed to Impress
Featuring a rustic split face texture, Keystone KeyMass has been crafted to blend with the natural environment. Easy to design with and easy on your eyes.

8.
Engineered to Last
Created in collaboration between Austral Masonry and Keystone Walls, the Keystone KeyMass system has benefitted from years of engineering excellence and expertise to create a strong, durable retaining wall system that is designed to stand the test of time.
Reach new heights
With four systems tailored to various needs—whether for low, non-critical walls or projects up to 15m or higher—Keystone KeyMass® is built to last over a century. Its strength, ease of construction, and all-weather durability make it the ideal choice for professionals seeking reliability and speed.
System Options
01. Gravity Wall


For low, non-critical walls up to 1.2m
The Keystone KeyMass® retaining wall system is effective as a gravity wall structure, utilising their weight, interlocking pin system, and interaction of the units to resist earth pressures.
Max Wall Height: 1.2m
02. No Fines Concrete Reinforced


For mass gravity retaining walls
The no-fines concrete backfill system increases the mass of Keystone retaining walls allowing the maximum heights of up to 4.4m. This is ideal for boundary walls where the geogrids would otherwise cross into the neighbouring property.
Max Wall Height: 4.4m
03. Extender


Use Keystone KeyMass® Extenders to built up to 4.4m
Keystone KeyMass® standard units can be combined with Keystone KeyMass® extenders to create a wall that will resist overturning thanks to the interlocking units on the walls face and the Extender units behind which bear the weight of the fill behind the wall.
Max Wall Height: 4.4m
04. Geogrid Reinforced


For walls up to 15m using AS 4678 (25m using project specific design)
When placed between layers of compacted soil, geogrids create a reinforced soil mass, which essentially acts as a larger gravity wall structure. Geogrids can be used with most existing site-soils and are not affected by water, micro organisms, alkali or acidic soils.
Max Wall Height: 15m using AS 4678 (25m using project specific design)
Video
Gallery


Keystone KeyMass Retaining Walls


Keystone KeyMass Retaining Walls
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Keystone KeyMass Retaining Walls
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Keystone KeyMass Retaining Walls
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Keystone KeyMass Retaining Walls


Keystone KeyMass Retaining Walls


Keystone KeyMass Retaining Walls
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Keystone KeyMass Retaining Walls


Keystone KeyMass Retaining Walls


Keystone KeyMass Retaining Walls


Keystone KeyMass Retaining Walls


Keystone KeyMass Retaining Walls