For a successful landscaping project in our region drainage must come first. In the Northern Rivers, rainfall isn’t just seasonal. It’s intense, fast, and often unpredictable. Summer downpours can overwhelm poorly designed hardscapes, leading to pooling, surface movement, algae growth, and premature material failure. Drainage isn’t glamorous, but it is fundamental for a successful design outcome that won’t crumble in your first rain event.
Before you lock your aesthetics in, you need to consider where the water flows on your site. This requires an audit of where it will go during heavy rainfall, how materials shed, absorb or channel water and how the whole system is going to work.
Base preparation
No hardscape material can compensate for poor base design. Use open-graded aggregates for rapid drainage and increase the depth of your base in clay-heavy soils. Avoid using standard road base where free draining is required.
Slopes, levels and water flow
Designers often introduce intentional slopes to support good drainage. This can look like subtle falls away from buildings, integrated drainage channels or gravel zones. Resolving this early can prevent costly fixes down the track.
Choose hardscape materials designed for heavy rain
Permeable pavers are a great choice in our climate. They allow water to infiltrate through joints, reducing surface water run-off. Make sure you choose the right aggregate as a sub-base. Make sure that it drains water efficiently, will provide structural support and stay stable over time.
Textured, natural stone is often recommended by designers. It is practical and attractive with reduced surface sheen and better slip resistance. Avoid highly polished or overly smooth finishes outdoors.
Exterior rated porcelain pavers are also popular due to their extremely low water absorption, consistent slip ratings and resistance to staining and algae. They work well on mortar-bed systems that allow water to flow beneath the surface.
To optimise your drainage, it is worth considering open-joint systems, particularly in courtyards, stepped landscapes and transitional zones near structures. This method involves leaving the joints between the pavers or stone permeable so that the water can drain through the surface rather than across it. Instead of locking everything together with dense sand or mortar, the joints stay open becoming part of the drainage system.
In the Northern Rivers, water will always find its way. Your goal should be to guide it, not fight it. When hardscape materials, base construction, drainage and aesthetics work together you will enjoy your garden design for years to come.
Plateau Landscape Supplies is your landscape and garden superstore. Our experienced team are here to guide you if you have any questions on your next landscaping project.