I am getting a brickie to build a retaining wall for me. It will be about 500mm high, and is purely decorative. It will also be up against a colorbond fence.
Now, I need a 'backing' so that the weight is not up against the colourbond fence. Someone suggested blueboard to me. What exactly is it, will it do the job, and how much does it generally cost?
Are there any other cheap solutions? I could obviously get the brickie to do the back as well, but will double my cost which is not something i'm willing to do.