Round downspouts are often more complicated to install than rectangular ones. They aren't available as easily, which means you may have to wait longer. They aren't available as easily, which means you may have to wait longer to install them. Semicircular gutters are often seen in older homes and offer more character and charm than traditional K-style channels. Because of their round shape, they are not placed flush with fascia boards and must be installed with support brackets to keep them in place.
In general, type K channels usually withstand larger volumes of water, but they don't offer the same charm. The semicircular channels combine perfectly with round downspouts, which are smooth cylindrical tubes. Round downspouts tend to have a more decorative look than the corrugated downspouts.
