Installing an above-ground pool wall can be very difficult if you try to do it alone. This is one project that requires a few extra hands to help. The problem is that the walls are quite flimsy before the water is added to hold them up. But with the extra help it becomes a much easier task. There is a lot of work to do before the walls can be installed, however, so you need at least a weekend to get to this point. Installing the walls only takes a couple of hours when the prep work is done correctly.