Most patio enclosure structures have three basic elements: the foundation and the floor; the walls, windows and doors; and the roof system. Of these, the roof system is the most challenging element for the do-it-yourselfer. There are a variety of patio roof products to choose from, but one of the most economical solutions is to install a corrugated roof panel system. Corrugated panel systems are installed over a network of rafters and spacers, called "purlins." The rafters can be tricky to install because they must be trimmed at an angle where they meet the house. If the cutting angle for the rafters is not indicated on your construction plan, consult an engineer or a building construction reference book to find the required angle.

Work from a blueprint or plan. Consult a professional architect or designer to help you design a project that meets your needs. Working from approved plans that are created with professional input is a key factor in the success of any patio enclosure project.

Create footings for the patio enclosure walls. Check with your building department for code requirements. One way to create a footing for walls is to dig a trench around the concrete slab, to the required width and depth. Pour concrete into the trench, using building paper or fiberboard to form an isolation joint that keeps the footing from bonding to the old concrete. If you do not have experience working with concrete, get additional information before you start.