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WHAT IS A RETAINING WALL SYSTEM?
Retaining walls do more than tidy up a yard, they hold back soil, create level ground and help manage sloping blocks. When the wall matters, the right system matters too. Steelmart stocks a proven retaining wall setup used across residential and landscaping jobs: precast concrete sleepers, hot dipped galvanised steel posts, and the accessories that make installation cleaner and more consistent. If you are building new or replacing a failed wall, start with materials designed to handle soil pressure properly.
Concrete Sleeper Retaining Wall
Concrete sleeper retaining walls use reinforced concrete sleepers installed horizontally between steel posts. They're one of the most popular choices for residential retaining walls because the system is straight, durable, and built for the job when installed correctly.
Retaining Wall Blocks
Retaining wall blocks are commonly used for smaller retaining walls, garden beds and stepped landscaping projects.
Why concrete sleepers are widely used
- Strong, long service life
- Clean, straight finish (great for boundaries and tight spaces)
- No rot or termites (unlike timber)
- Flexible look options: block pattern, smooth or timber-style sleepers
Important: installation depth, footing, and drainage behind the wall make a big difference to long-term performance.
Why retaining wall blocks are popular
- Easy to handle and install
- Suitable for curved and tiered walls
- Ideal for landscaping projects
- Available in different finishes and styles
For higher walls or load bearing applications, engineering advice may be required depending on height and site conditions.
Why Customers Choose Steelmart
Retaining wall supplies stocked and ready to order online Concrete sleepers in multiple finishes (block / smooth / timber pattern) Steel post options to suit straight runs and corners Accessories to help with alignment and finishing (caps, wedges, spades)
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Need Help Choosing?
Talk to the team about post types, finishes and accessories for your job.
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FAQs
What is a concrete sleeper retaining wall?
A concrete sleeper retaining wall is built using precast concrete sleepers installed horizontally between galvanised steel posts. It's a popular system for residential and landscaping retaining walls because it's strong, straight and low maintenance.
Do you sell retaining wall blocks?
Steelmart's retaining wall range is based around concrete sleepers and steel posts, not standalone "block" retaining wall systems. If you're after a block look, our block-pattern concrete sleepers give that style in a sleeper system.
What types of concrete sleepers do you stock?
We stock: Block Pattern, Smooth & Plain, Timber Pattern.
Do retaining walls need drainage?
Yes, drainage behind the wall helps relieve water pressure, which is a common cause of retaining wall issues. Good drainage and correct backfill are key parts of a reliable wall.
Do you supply posts and accessories as well as sleepers?
Yes. Steelmart stocks steel end posts, H-posts and corner posts, plus accessories like post caps, sleeper wedges and post spades.
Are concrete sleepers good for retaining walls?
Yes. Concrete sleepers are a popular choice for retaining walls because they are strong, durable and low maintenance. They do not rot, twist, or attract termites like timber, and when installed correctly with proper posts and drainage they can handle significant soil pressure.
What's the difference between an end post, H-post and corner post?
End posts are used to start/finish a run. H-posts join sleepers in the middle of a straight run. Corner posts are used when the wall changes direction.
What is the Australian standard for retaining walls?
Retaining walls must meet relevant building requirements, and walls above certain heights or supporting additional loads often require engineering design and (in some cases) council approval. It's always best to confirm local requirements for your site and wall height