Retaining Wall Waterproofing Sydney
A retaining wall holds back the ground behind it — and if the water in that ground isn’t managed properly, it will eventually find a way through the wall itself.
Why retaining walls leak
Soil holds water after rain, and that water pushes against the wall — hydrostatic pressure — until it finds a way through: cracks, joints, or straight through porous concrete or block. A retaining wall without proper waterproofing and drainage behind it is a matter of when, not if.
How we waterproof them
Membrane on the wall’s soil-facing side, a drainage cell or aggregate behind it to relieve pressure, and an agi-drain at the base to carry water away instead of letting it sit against the wall.
New walls and existing failures
On new builds this goes in before backfill, as part of the sequence. On existing walls showing damp, efflorescence or cracking, we assess what’s failed and whether it can be fixed from the exposed side or needs excavation.
Got a retaining wall that needs doing properly?
Call and speak to someone who does the work, or send through the details and we’ll get back to you.
Talk to us about your projectCall 0450 679 512