The precast L Wall units are ideal for forming both retaining and containing structures in residential, commercial, industrial and waste developments. 

L Wall units are an ideal product where speed of installation is necessary. They offer a fast, cost effective solution for constructing retaining walls, with standard sizes range from 1m high up to 3.75m high and a width of 1m or 2m depending on height dimensions. We now also offer L Walls in heights of 4m-6m. 

Installing L-shaped vertical concrete walls

Common uses

General retaining wall requirements
Can be used where space is restricted so a vertical system is required
Where a robust durable method of retention is required


On a design, supply and installation basis, Phi Group will design and install the foundation if required. The installation process is then simple, with the units machine placed onto the concrete foundation and fixed into place using resin and bolts.


Up to 120 year design life
Quick and easy to install
In stock so quick delivery times
A range of standard unit sizes available
Corner units available