Most modern aluminum fences have modular designs. This means that the majority of the construction can be done very easily. Often, the rails will snap right into the post without any actual screws or fasteners. Of course, the actual specifics of the modular design depends on the material and brand that you choose. That being said, they are all made with easy installation in mind. Regardless of the exact product that you choose, the most difficult part of the entire fence installation process is probably going to be setting the post.