Welcome to Outback Sleepers Australia, Adelaide’s premier provider of high-quality concrete sleepers and retaining walls. With over two decades of expertise, our team of experts specialises in crafting durable, cost-effective and visually appealing retaining wall solutions tailored for Adelaide’s unique landscapes.
Our sleepers are low-maintenance and versatile, available in a variety of colors, textures and sizes.
We can deliver retaining wall sleepers in Sydney and Adelaide.
We provide an extensive selection of concrete sleeper products, meticulously crafted to meet the varied needs of properties and lifestyles in Adelaide. Our sleepers, quality assured to a minimum of 60MPa, deliver unparalleled strength and style to your home improvement projects.
Among our diverse range, we feature sleepers in sophisticated shades like charcoal, adding a touch of elegance to your landscaping endeavors.
Complementing our product offerings, we extend a complimentary consultation service and offer convenient local pickup or delivery options in Adelaide, ensuring that our sleepers align perfectly with your specific requirements.
Our commitment to quality and innovation is evident in every sleeper we produce. Engineered to meet Adelaide’s diverse landscape requirements, our sleepers combine robust construction with aesthetic versatility. They are designed for both functionality and style, beautiful in appearance, available in a variety of sizes and colours, ideal for outdoor settings in Adelaide. Start your landscaping project with us today after a thorough consultation with our experts!

Reinforcing Bars
Reinforced with 2 x N10 bars for superior structural integrity, ensuring longevity and resistance to rot and degradation.
50 Year Product Lifespan
Manufactured to Australian standard AS3600/2018, guaranteeing a 50-year product lifespan.
Exceptional Strength
Exceptional 60 MPa concrete strength, offering 50% more strength than the standard 40 MPa.
Our concrete sleepers in Adelaide are the ideal choice for creating robust and stylish retaining walls. Crafted to suit the unique environmental conditions of Adelaide, these sleepers boast a formidable 60 MPa strength, making them 50% stronger than the standard industry offerings. This superior strength ensures they can withstand the varied Adelaide weather, offering unmatched durability. Their design versatility also means they integrate seamlessly into both modern and traditional Adelaide landscapes.
Beyond their aesthetic appeal, our Adelaide concrete sleepers are designed for simplicity in installation, making them a popular choice for large or DIY projects. Complying with the Australian Standard for Concrete Structures (AS 3600), we ensure our materials are not only robust and long-lasting but also practical and easy to work with for any Adelaide landscaping project.
Watch the video to see just how strong our concrete sleepers are!

Outback Sleepers Australia, with over 20 years of experience, is a family-run business that has grown from a small South Australian workshop to a leading supplier of high-quality concrete sleepers and retaining walls. Our commitment to excellence in product quality and customer service is unwavering making us the DIYers and tradies’ choice for concrete sleepers in Adelaide:
Discover more about our journey, values, and the comprehensive range of products we offer for Adelaide’s landscaping needs.
Visit www.outbacksleepers.com.au or check out our Facebook page and browse through our gallery of successful projects in South Australia. Start your landscaping project with us today!
I have been working with Outback Sleepers for over 8 years now and have had a great relationship with them. They have always provided great products and always keeping the quality up where it needs to be for us builders. They are the market leaders and their products are head and shoulders above the rest. Looking forward to many more years of working together.
Bruce Colbert, Retaining Wall Builder
I'm very happy with the high level of customer service I always receive at Outback Sleepers Australia. The paperwork is consistently correct and my orders are always packed up and ready for collection when I require them. There's never any fuss - I sign for my orders and I'm soon on my way.
Brian Hunter, Bridge Building Supplies
You can be proud of your staff whom at the forefront of communication handle orders with utmost professionalism. Furthermore, it's nice to know we can rely on a premium grade product that makes our life easier.
Gary Offley, Retaining Wall Industries (Civil) Pty Ltd
I visited my house at Crafers last night and all good with the retaining wall. I am so glad we managed to come to the arrangement. I appreciate your follow up, service and, of course, your offer to fix it. Five stars to you and the company.
Martin, Crafers
We have been dealing with Outback Sleepers Australia for over 20 years and we have found them to be a very supportive and professional organisation. They have a great range of products and the engineering specifications to back up their products. Orders are always delivered on time and the price is great. As a reseller of Outback Sleepers Australia, we are not treated like another customer but treated as a trade partner working together.
Theo Kyriazis, Newtons Building & Landscape Supplies
We appreciate Outback Sleepers as a business that values every customer as just as important as the next, big or small!
Doug Chetwynd, Aldinga Landscapes
I’ve dealt with Steve on the phone ever since he has worked for Outback Sleepers and have always found him a pleasure to deal with. I believe he represents Outback Sleepers in a very professional manner, and is an asset to the company.
Stuart Fletcher, Fletcher's Landscaping
Outback Sleepers provide impeccable service and have not let us down on any occasion. The wide range of quality products makes it extremely easy to meet project engineering requirements. I have also found their delivery service to be very reliable and professional.
Mitchell Long, Project Manager, Diverse Civil & Commercial Projects
We have used Outback Sleepers since 2007 and have found their products to be of the highest quality & to exact length and height, allowing us to construct a wall that’s always flat with lines that match up. We find they have an extensive range of styles and colours that are always in stock giving us more variety of choice. Their team always provides excellent and professional customer service, making the overall experience for us and our customers amazing. We always use Outback Sleepers for our jobs and recommended them as our preferred supplier.
Darren Langsford, Complete Retaining Walls Pty Ltd
I have been using Outback Sleepers for my Retaining walls and Under Fence Plinths now for about 2 years, The detail to there finished product is second to none, and there pricing is very competitive, I highly recommend giving Outback Sleepers a chance to quote next time you are thinking of Tendering your next Retaining wall.
Simon, Butterfield Fencing
We’ve used Outback Sleepers Australia for the last couple years because they manufacture the highest quality sleepers. We're a small-to-medium size retaining wall company in Adelaide, and they make ordering sleepers easy. They always deliver when they say they will, making our construction timeline predictable. On the very rare occasion a concrete sleeper is chipped or not 100% perfect, they bend over backwards and do everything they can to fix it right away. Their quality, service & ability to handle large orders in short time frames has enabled us to grow our company.
Martin Mucha, Director, Active Fencing and Retaining
We have been using outback sleepers for all of our Under Fence Plinths and small retaining wall supplies. We like to use them because they always have the items we need in stock, they deliver my product on time and their staff are all friendly and very helpful.
Lee Benson Fencing
Absolutely! We cater to everyone in Adelaide, from individual homeowners to professional trade clients. Our wide range of concrete sleepers is designed to meet the diverse needs of your Adelaide projects, including retaining walls and garden edges. Aside from Adelaide, we also cover various locations nearby, including Clare, Mt. Gambier, Renmark, Port Lincoln, Port Augusta, Riverland, Naracoorte, Whyalla, and Mildura.
We offer convenient delivery services across Adelaide. Alternatively, you can pick up your order directly from our local warehouse. Our Adelaide team is ready to assist with any queries regarding the weight and size specifications of your order.
In Adelaide, retaining walls over 1 meter in height typically require engineering and council approval. This can vary, so we recommend checking with your local council. We’re here to provide installation guidance and can offer quotes for both DIY and professional setups.
To guide your purchases and installation process, we also have an informative PDF guide available.
Yes, all our sleepers can be tailored to your specific needs. While we don’t offer a cutting service, our sleepers are compatible with standard 100uc and 150uc steel options.
For more details on cutting sleepers, please refer to our post cutting your sleepers.
Sure – the C channel is for the start and finish of the wall (and for creating corners) and the I beam is for the continuation of the sleeper wall (i.e. it connects each sleeper bay). We also supply fence brackets for added support.
I Beams can also be known as H beams, UB (Universal Beam), joiners etc.
C Channels can also be known as end pieces, PFC, U piece etc.
Our Primed steel is powder coated red and can be painted any colour you wish, or treated with rust prevention solutions.
Galvanised steel is easier to work with because you can put it straight into the ground. There is no need to paint or treat it, unlike Primed steel. As it’s hot dipped galvanised, it will last a long time before rusting occurs.
Afraid not – we simply manufacture and supply.
Please contact our office in Adelaide at (08) 8387 9227 or message us on our Live Chat if you’d like us to recommend some installers for your local area.
We also have an installation guide on page 12 in our Product Guide.
Our sleepers come in 2m and 2.4m lengths, 200mm high and they come in a range of thicknesses to cater for different wall heights for creating the perfect boundary.
We also manufacture 2m and 2.4m Cribs (100mm high) for each of our sleeper designs.
To determine how many sleepers you need, make sure to check out our Retaining Wall Calculator.
Contact us to discuss the best options for your property at (08) 8387 9227 or message us on our Live Chat for more information.
Yes – we can supply you with any type, size and length of steel, including C Channel Posts and I/H Beams.
We don’t charge for the delivery of retaining wall steel posts if it’s delivered with your sleepers. *
* Certain exclusions apply i.e. large quantities and long lengths of steel)
Yes – for more information visit our warranty page here.
Yes – we deliver via Semi-Trailer and unload using an All-Terrain Forklift. Returns and exchanges are handled efficiently to ensure customer satisfaction.
Yes – you can pick up direct from our factory. Please call (08) 8387 9227 or message us on our Live Chat in advance so we can prepare your order.
Please note that due to WHS regulations and general road safety issues we can’t load cars, vans, station wagons etc with Concrete Sleepers, regardless of the size and quantity of the order.
You can build retaining walls up to 4m high using our engineered sleepers (subject to council approval and engineering).
The illustration below shows how you could construct your wall using our different 2m sleepers.

No – UFP’s are not engineered and designed to retain heavy compaction.
A light back fill (i.e. garden soil or bark) is fine, however if paving and concrete will be against the UFP’s then sleepers should be used instead. Please see the UFP page for more info.
UFP’s primary function is to fill the gap underneath a fence, prolong the life of the fence panel by preventing it from rusting and provide extra privacy.
The general rule, unless otherwise stated by an engineer, is that whatever is out of the ground must be in the ground. For example, an 800mm high wall must have 800mm of steel in the ground as well. Therefore, the steel length should be 1600mm.
It is recommended that you always go a minimum of 600mm into the ground.
Please see the ‘Resellers’ page to locate your nearest Reseller with a display.
Unfortunately, not – please see our opening hours below;
Office hours 7.30 am – 5.00pm Monday to Friday
Pick Up hours 7.30 am – 4.30pm Monday to Friday
*All times are ACST (Australian Central Standard Time)
Please contact us on (08) 8387 9227 or message us on our Live Chat so we can provide you with pricing to suit your requirements.
