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Retaining blocks - a simple way to reinvent your outdoors
Retaining blocks - a simple way to reinvent your outdoors
Retaining blocks can be used for a variety of garden and outdoor projects. Whether you want to build a retaining wall, establish some garden beds, install decorative edging, or create a focal point, retaining blocks are one of the most innovative and practical solutions to transform your outdoor space into the oasis you deserve.
Made from pre-cast concrete, they are functional, easy to install, durable, and can last for decades, making them a solid investment for your property.
With our wide range of shapes, sizes, and colours from established companies Firth and Austral Masonry, you’ll find exactly what you need to create a unique and visually stunning project that perfectly matches your budget, style, and taste.
Remember to check with your local council, as certain projects will require consent and might need the expertise of a certified building practitioner or chartered professional engineer.
Firth Retaining Blocks
Firth retaining blocks are perfect for DIY. They’re easy to assemble and come in earth-tone colours, with a natural look of quarried stone. Known as ‘Lego for the backyard’, you’ll love the variety of projects you can use these retaining blocks for. One of New Zealand's best-known and most trusted trade names, Firth has been developing, manufacturing, and delivering concrete products to Kiwis for almost a century. Our range includes Ezi Wall, Keystone Sedona Stone, Keystone Garden Wall, and Keystone Compac III.
Austral Masonry Retaining Blocks
Austral Masonry retaining blocks are quality, stylish, and versatile. Designed for durability and inspired by nature, oxides and coloured sands are added to raw materials giving Austral products contemporary colours and textures. Their timeless appearance will complement any project you have in mind. Our range includes Hayman, Heron, and Moreton Austral Masonry retaining blocks.
Firth Ezi Wall Retaining Blocks
These blocks are small, light, and easy to handle, with a unique interlocking system for easy installation. And with minimal foundation preparation required, you'll have the job done quickly. Ezi Wall is suitable for low freestanding retaining walls, garden edging, garden beds, and tree wells.
- Capping units available
- Build curved, straight, or terraced walls
- Build walls up to 0.5m high
- Small block size (approx. 5.6kgs)
- 57 blocks per m2
- 7.14 blocks per lineal metre
- Strength: 12.5Mpa
Available Colours:
Firth Keystone Sedona Stone Retaining Blocks
Available in two face styles, Keystone Sedona Stone is a compact, lightweight, and versatile solution for creating low walls, decorative tree rings, planters, raised garden beds or finishing your lawn edge. Note: This system cannot handle any loading or surcharge (extra weight such as patios, swimming pools or driveways) in the retained area above the wall.
- Available in Straight Faced or Triface style
- Straight Faced available in Ash or Charcoal colour
- Triface available in Rockface colour
- Build curved, straight, or terraced walls
- Build walls up to 0.5 m high
- Lightweight: approximately 5 kgs
- 50 units per m2
- 5 units per lineal metre
- Strength: 12.5 MPa
- Not suitable for loading or surcharge in the retained area above the wall
Available Colours:
Firth Keystone Garden Wall Retaining Blocks
With a natural look of quarried stone, this block will blend in with any landscape. It's perfect for projects like retaining walls, tree rings, patios, lawn edging, and garden or flower borders and its unique interlocking system makes installation easy. Note: This system cannot handle any loading or surcharge (extra weight such as patios, swimming pools or driveways) in the retained area above the wall.
- Triface style
- Colour: Rockface
- Build curved, straight, or terraced walls
- Build walls up to 0.7 m high
- Medium-size block (approx. 13 kgs)
- 33.3 units per m2
- 3.3 units per lineal metre
- Strength: 12.5 MPa
Available Colours:
Firth Keystone Compac III Retaining Blocks
The Compac III is a large format retaining block suitable for DIY and professionally engineered projects. Its lighter weight makes installation easy whilst maintaining structural integrity. Available in colours that complement any taste and design, the natural stone texture appearance will fit beautifully in any landscape.
- Straight Faced style
- Available in 2 colours: Rockface, Onyx
- Corner and Capping units available
- Unit doesn’t require inverting, the shape allows for radius curves and vertical core alignment
- Build walls up to 0.7 m high (18.2 m when engineered and with correct consent)
- Large-size block (approx. 32 kgs)
- 11 units per m2
- 2.19 units per lineal metre
- Strength: 15 MPa
Available Colours:
Austral Retaining Blocks
Austral Masonry Hayman Retaining Blocks
Sleek and modern with a smooth finish, Hayman retaining blocks are available in two neutral colours. Their simple design, mortarless interlock, and manageable weight make them perfect for a DIY project.
- Available in 2 colours: Limestone, Charcoal
- Build curved or straight walls, corners, steps
- Build walls up to 0.8 m high (3 m when engineered)
- Standard unit: 390 L x 245 W x 198 H mm, 24 kg, 13 units per m2
- Universal Corner unit: 360 L x 160 W x 198 H mm, 17.2 kg, 5 units per m2
- Capping unit: 390 L x 245 W x 90 H mm, 16 kg, 2.56 units per lineal metre
Austral Masonry Heron Retaining Blocks
Heron retaining wall blocks have a colour and finish suitable for all landscaping projects. Perfect for DIY, they require no mortar and are virtually maintenance-free.
- Available in 2 colours: Limestone, Charcoal
- Build curved or straight walls, corners, steps
- Build walls up to 0.8m high (3m when engineered)
- Standard unit: 390 L x 245 W x 198 H mm, 24 kg, 13 units per m2
- Corner unit: 360 L x 160 W x 198 H mm, 20 kg, 5 units per m2
- Capping unit: 390 L x 245 W x 90 H mm, 9 kg, 5.13 units per m2
Austral Masonry Moreton Retaining Blocks
Earthy colours, a split face finish, and the diamond shape of each block ensures Moreton retaining walls will complement any landscape with a unique and timeless appeal. This is the perfect block for DIY projects.
- Available in 2 colours: Limestone, Charcoal
- Build curved or straight walls, corners, steps
- Build walls up to 0.8 m high
- Standard unit: 390 L x 200 W x 200 H mm, 18.5 kg, 13 units per m2
- Capping unit: 390 L x 200 W x 200 H mm, 22 kg, 2.56 units per m2
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