Half-round gutters are on many turn-of-the-century homes. Although, many homeowners still use them. Half-round gutters come in a variety of materials and can also be seamless. These gutters are also favored for their smoothness and resistance to corrosion and clogging. Plus, they are easier to clean.
Half-round gutters aren't able to hold a lot of water, which can cause them to overflow in areas with a lot of rainfall.