In the United States, half-round gutters have been in use for at least 60 years. Although they might not be as appealing to the eye as the more elaborate gutter systems, they do work quite well in the long run. These are a kind of gutter that starts out at one edge of the roof and curves around towards the opposite end. They look like a half-round globe and the purpose is to allow rainwater to flow off without running down into the eaves or blocking other areas of the roof. You can learn more at https://www.gutterilla.com/half-round-gutters-all-you-need-to-know/
Guttering materials such as clay tile have been used for half-round gutters for quite some time. Other common materials include concrete, stainless steel, copper and aluminum. For some historic homes or rural homes with steep roof shapes, flat or pitched roofs may also be used instead of the rounded gutters. Most modern homes nowadays use the aluminum type of guttering, though they are not preferred because they can rust if exposed to too much moisture or water.
The installation process of half-round gutters is actually quite easy. Since they are basically just elongated troughs with perforations for the water to drain, there is very little need for underlayment. There are two types of installation: the full-round installation which is where the entire trough is installed and the k-style gutter system, which consists of only the fascia. Fascia installation is easier because it has fewer perforations and comes in a variety of lengths and thicknesses, so you can customize it to best fit your home. In terms of efficiency, half-round gutter systems are less efficient than the k-style gutter system, but in some areas where it is less expensive to install them, they prove to be more economical.