Retaining walls are designed to hold back soil on sloped or uneven ground, so it doesn’t erode or collapse. As an Australian homeowner, you know how important this is given our varied terrain and weather.
Retaining walls also offer practical benefits and can also add to your property’s aesthetic. Let’s take a look at some of these perks.
1. Prevents Soil Erosion and Landslides
One of the biggest benefits of retaining walls is stabilising the soil on sloped ground. Holding the soil in place protects your property and structures from erosion or landslide damage. This is especially important in areas of Australia, like Sydney, where retaining walls are needed to stop heavy rain from eroding unprotected soil.
Fact: Did you know retaining walls can reduce soil erosion by 75%?
A well-built wall can also save you from costly repairs and extend the life of your property.
2. Creates Flat Space
These walls can turn sloping ground into levelled areas for:
- Landscaping
- Gardening
- Outdoor entertaining areas
- Children’s play areas
3. Looks Good
In addition to the practical benefits, retaining structures can add to your property’s visual and street appeal. With many materials and design options, you can pick a retaining wall that matches your home’s style and landscaping.
Some popular retaining wall materials include:
| Material | Pros | Cons |
| Concrete Blocks | Durable, cost-effective, easy to install | Limited design options |
| Natural Stone | Attractive, timeless appearance | Expensive, labor-intensive installation |
| Timber | Affordable, eco-friendly, easy to work with | Less durable, requires regular maintenance |
| Brick | Classic look, complements many home styles | Prone to cracking, labour-intensive installation |
Choosing the right material and design for your retaining wall can be a feature in your outdoor space.
Drainage Control
Drainage is key to preventing water damage to your property. Retaining walls can direct water away from your home and other structures by including features like weep holes and backfill materials that allow drainage.
A good retaining wall system can:
- Stop water from getting into your home’s foundation
- Reduce soil saturation and instability
- Minimise erosion from poor drainage
Talk to a professional to make sure your retaining wall has adequate drainage.
Adds Value
A well-built retaining wall can add value to your property. They create more space and prevent erosion damage, making your property more attractive to buyers.
Things to Consider When Building a Retaining Wall
Before you start your project, consider:
- Height: The height of your retaining wall will dictate the materials and construction methods. Walls over 1m high require professional engineering and design.
- Materials: Choose materials that fit your budget, style and purpose of the wall.
- Drainage: Make sure your retaining wall has drainage solutions to prevent water damage and soil instability.
- Anchoring: Retaining walls must be anchored to withstand the pressure of the soil they’re holding back.
- Regulations and permits: In Australia, for example, walls over a certain height or affecting neighbour’s properties may require council approval. Check with your local council for the rules.
If in doubt, talk to the experts to ensure your retaining wall is designed and built to perfection.
FAQs
How long do these walls last?
The life of a wall like this depends on the materials used, the quality of construction and the environment it’s exposed to. A well-built retaining wall can last 20-100 years with maintenance.
Can I build a retaining wall myself?
While you can build a small wall as a DIY project, hiring professionals for walls over 1m high or complex designs is generally recommended. Professionals have the expertise to ensure your wall is structurally sound and complies with local regulations.
How much does it cost to build one?
The cost depends on the materials, height and length of the wall and complexity of the design. In Australia, retaining wall costs range from $200 to $800 per m2. Get quotes from multiple contractors to get a quote for your project.
Summary
- It prevents soil erosion and landslides and protects your property.
- Creates flat space for landscaping, gardening and outdoor living areas.
- Retaining walls can be a feature that enhances your property and your home’s style.
- Drainage control is key to preventing water damage, and retaining walls can help direct water away from your home.
- A well-built retaining wall can add value to your property and attract buyers.
- Consider height, materials, drainage, anchoring and local regulations when building your retaining wall.
- Talk to the experts to ensure your retaining wall is designed and built perfectly.
