At Gorilla Wall, we’re your number one source of strong, durable concrete sleepers that will ensure your retaining walls last a lifetime. While timber sleepers are prone to discolouring, warping, rotting and buckling under the stress of Australia’s harsh climate, our retaining wall sleepers in Melbourne can help you get the job done right. It’s our mission to help people build premium retaining walls, made possible with years of experience in the construction industry.