Roofs come in all shapes and forms, ranging from “flat” concrete roofs to steeply pitched roofs. Some roofs are tiled while others types of roofing is finished with sheeting of various types. Thatch is also used for roofing, though the structure of rafters and beams is completely different to that used for other types of roofs.
The National Building Regulations are mostly concerned with elements that will ensure our roofs are durable and waterproof, and will resist fire.
You can read the basics about Roofs and Roofing in the section that covers SANS 10400-L (2001). In addition, we have provided articles that will help you: