Half-round cast aluminium gutters and pipes offer the traditional look of cast iron with the durability, corrosion resistance, and low maintenance of modern aluminium. They are lightweight, easy to install, and available in various colours and finishes to match different architectural styles, making them ideal for heritage buildings, conservation projects, and high-quality new builds. While aesthetically pleasing and functional, their higher cost and more complex installation compared to other gutter types should be considered.