Drainage - Man Hole Cover Grates & Ducting. Guttering refers to channels of plastic or metal for draining away water. Guttering and drainage form part of the liquid discharge system of a building. Guttering is made from many materials such as cast iron, asbestos cement, cast and extruded aluminium and UPVC. Searching for all the suitable materials can be a daunting task. That’s why you have Buildworld, a single stop for all guttering and drainage requirements. Buildworld provides complete solutions for repairing and replacing your existing guttering and drainage systems and new installations. Select styles from Rounding, Squareline, and Mini-Fit Guttering systems. We offer gutter and drainage systems only from the best companies for both domestic and commercial constructions. We have a massive range of profiles for your drainage systems.