Retaining walls are used to contain soil and manage water run-off for the prevention of hillside erosion and slips. It is important that retaining walls are appropriately designed for their location as they must withstand significant pressure and a failing wall can cause significant damage.
There are many different systems used for retaining walls.
Low cost and easy to build, Gabion basket retaining walls are an attractive option. They are constructed of rocks wrapped in strong wire mesh baskets and stacked together.
Crib walls are made up of a series of interlocking beams, creating a hollow space which is filled with soil and rock and all held in place by gravity.
This type of retaining wall has been around for a long time and while they can be constructed from timber, they are most commonly made from prefabricated concrete blocks.
The way crib walls are constructed makes them ideal for planting and they can look very pleasing to the eye.
Timber retaining walls use strong wooden posts buried deep in the ground with cross beams to contain the hillside.
Many retaining walls were damaged in the Christchurch earthquakes – it is important that they are checked and properly repaired to ensure they don’t pose a safety risk.
The Christchurch City Council has more info here.
Contact Backyard Projects contact us to discuss your retaining wall needs today.