Drainage is the most overlooked and most critical component of any retaining wall. A wall without adequate drainage will fail — it's not a matter of if, but when. Water pressure behind a retaining wall can exceed the lateral earth pressure the wall was designed to handle, causing blowouts, tilting, and complete structural failure. Our drainage kit gives you everything you need to protect your wall investment from day one.
With 40+ years of hands-on retaining wall experience across Australia, we've seen more walls fail from inadequate drainage than from any other cause. Don't cut corners on drainage. See our full guide: How to Install Drainage Behind a Retaining Wall.
Install coarse gravel backfill (minimum 300mm wide) directly behind the wall, with slotted ag pipe at the base discharging to a legal point of discharge. Wrap the gravel zone in geotextile fabric to prevent native soil fines from migrating into the drainage layer over time. See our full installation guide: How to Install Drainage Behind a Retaining Wall.
All retaining walls must comply with AS 4678-2002 Earth Retaining Structures, which requires adequate drainage provision. See our Retaining Wall Regulations — State-by-State Guide.
Delivered direct to your site across Sydney, Melbourne, Brisbane, Perth, Adelaide, Canberra, Gold Coast, and regional Australia. Get a free quote with delivery cost to your address.
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