K-style is the most common residential gutter profile, with a flat back and a decorative front that resembles crown molding. It holds more water than a half-round gutter of the same width.
Named for the shape of its cross-section, the K-style gutter has a flat back that mounts cleanly to the fascia and a curved, ogee-style front face that gives a finished, molding-like look. Its profile carries significantly more water than a half-round of equal width, which makes it the default choice for most homes — especially steep or large roofs. K-style gutters are commonly formed seamlessly on-site in 5-inch and 6-inch sizes. The 6-inch size, paired with larger downspouts, is worth considering for roofs that shed a lot of water fast.
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