Retaining Wall Advice

Weep holes or ag pipe - which does your retaining wall need? Why they work together, not as alternatives, and what a complete drainage system actually requires.

What are weep holes in a retaining wall? How they work, AS 4678 guidance, and why they're secondary drainage, not a replacement for ag pipe.

Concrete sleeper retaining walls do not require waterproofing in most residential applications — but they do require correct drainage. This guide explains when waterproofing adds value, what products are used, and why drainage is always the priority for long-lasting retaining walls in Australia.

A practical guide to retaining wall drainage in Australia — covering hydrostatic pressure, ag pipe, geotextile filter fabric, drainage gravel, weep holes, and the most common drainage mistakes that cause retaining walls to fail.