We've witnessed a significant rise in installations of 6" seamless gutters in recent years. Given the considerable variation in roof pitch among homes, it is crucial to design a custom gutter system that suits your specific roof. The pitch greatly affects how rainwater flows into the gutters, and many homeowners have found their smaller 5" gutters overflow during heavy rain. 6-inch gutters can handle approximately 40% more volume than a 5″ gutter system. Below are additional factors that need to be considered when deciding between 5-inch and 6-inch gutters for residential housing.